Analytical methods for the first batch of SVHC substances under REACH subject to public consultation

Well, 4,4’-diaminodiphenylmethane, dibutyl phthalate, cobalt dichloride, arsenic pentoxide, arsenic trioxide, sodium dichromate dihydrate, xylene musk, bis(2-ethylhexyl) phthalate, hexabromocyclododecane, short-chain chlorinated paraffins, dibutyltin oxide, lead hydrogen arsenate, triethyl arsinate, butylbenzyl phthalate. The question posed is a bit vague – what are the concentrations of these substances, and in what media do they exist? It is preliminarily determined that organic compounds such as esters can be analyzed using gas chromatography, while heavy metals can be detected by atomic absorption.

Finished product analysis. I know how to use GC-MS or LC-MS ； or ICP-OES ； But since there are no national standards, does any colleague have any analysis criteria available?

Chinese name: Anthracene English name: Anthracene Molecular formula: C14H10, C6H4(CH)2C6H4 Structure: All C atoms form σ bonds using sp2 hybridized orbitals. Molecular weight: 178.22 Basic properties: Physical properties: White flaky crystals with a faint blue fluorescence, or light yellow needle-shaped crystals. (The pure form is white with purple fluorescence.) Relative density: 1.25 (27°C); 1.283 (25°C). Melting point: 217°C; boiling point: 342°C; flash point: 196.1°C and 121.1°C (closed system) – all values in °C. Vapor pressure: 0.13 kPa at 145°C. It is insoluble in water, slightly soluble in ethanol and ether, and more soluble in hot benzene. 　　Stability: Stable. Applications: Used as a luminescent material (e.g., in scintillation counters), especially for coatings (e.g., to absorb ultraviolet light). Used in the production of anthraquinones and dyes, etc. It is also used as an insecticide, fungicide, gasoline antifreeze, etc. 　　Production or source: Obtained in the final stage of coal tar distillation, and can be separated from the anthracene oil fraction of coal tar. 　　Hazard mark 20 (Corrosive). Derivatives: Aniline, anthraquinone. Based on their properties, they should be analyzable using gas chromatography. GB/T 3998-1983. Last edited by lifanwang on 2009-3-5 20:43.]

Diaminodiphenyl methane, also known as methylenedianiline; abbreviated as DD50 or MDA. Its molecular formula is C13H14N2. Diaminodiphenyl methane is also referred to as methylenedianiline, with the abbreviations DD50 or MDA; its molecular weight is 198.3. A white crystalline powder with a relative density of 1.15 (at 20°C/4°C), a melting point of 89–90°C, and a boiling point of 232°C (at 1.2 kPa). Soluble in propane and methanol. Insoluble in benzene and ether. Toxic, LD50 252 mg/kg. 　　Used as a high-temperature resistant curing agent for epoxy resins; the recommended dosage is 25–30 phr. The pot life is 8 hours (for 100 g), and the curing conditions are 100 ℃/2 hours followed by 150 ℃/2 hours. The heat deformation temperature of the cured product is 155°C, and it turns dark brown after prolonged exposure to sunlight. 　　Those precipitated from water are white flaky or needle-like crystals, while those precipitated from benzene are flaky crystals. Slightly soluble in cold water, readily soluble in ethanol, ether, and benzene. 　　Dye raw materials for the production of azo dyes ； Vulcanizing agents and vulcanization accelerators, used for polyurethane rubber and other synthetic rubbers ； Resin curing agent for epoxy resins, with properties similar to m-phenylenediamine ； Monomers for heat-resistant polymers and polyisocyanates ； Organic synthesis intermediates, used in the production of corrosion inhibitors and polyamides ； Wolfram detection reagents, etc. 　　It oxidizes easily in air, causing its color to darken. This substance is toxic and can cause damage to the liver. A regular gas chromatograph equipped with a FID is sufficient for detecting a purity of ≥99.0% for 1260 (GC). Last edited by lifanwang on 2009-3-5 at 20:55

SVHC　　Substances of Very High Concern under REACH – SVHCs　　Substances that meet the requirements of Article 57 of REACH are generally considered to be Substances of Very High Concern (SVHCs). For such SVHC substances that meet the following conditions, notification is required in accordance with Article 7(2) of REACH: (1) The substance is listed on the list of candidate substances for which authorization is required before use (Appendix *V) ； (2) The concentration of this substance in the material is greater than 0.1% (by weight ratio W/W) ； (3) The total amount of that substance in the items manufactured or imported by each manufacturer or importer per year exceeds 1 ton ； (4) This substance has not been registered for this use yet. 　　Service phone numbers in China for SVHC testing: 0574-27867928, 27867926, 27867925. However, under normal, reasonable, and foreseeable conditions of use and disposal, if the manufacturer or importer can rule out the possibility of exposure of humans or the environment to this substance, then no notification is required. As stipulated in Article 7(7) of REACH, notifications regarding Substances of Very High Concern (SVHCs) must be submitted no later than 6 months after the substance is included in the list of substances subject to authorization for use; this provision came into effect on June 1, 2011. Information regarding substances contained in a product that are on the list of candidate substances shall be submitted directly by the supplier of that product to the recipient of the product after such substance is added to the candidate list (Article 33 of the REACH Regulation). As substances are identified as meeting the criteria of Article 57’, the list of candidate substances will be continuously updated. 　　On June 18, 2008, the EU announced the first batch of SVHC substances under REACH that were made available to the public, totaling 16 substances. After revisions, cyclododecane was removed, leaving 15 substances. Chinese Name Substance Name CAS Number EC Number Anthracene Anthracene 120-12-7 204-371-1 4,4’-Diaminodiphenylmethane 4,4’-Diaminodiphenylmethane 101-77-9 202-974-4 Dibutyl phthalate Dibutyl phthalate 84-74-2 201-557-4 Cyclododecane Cyclododecane 294-62-2 206-33-9 Cobalt dichloride Cobalt dichloride 7546-79-9 231-589-4 Diarsenic pentoxide Diarsenic pentoxide 1303-28-2 215-116-9 Diarsenic trioxide Diarsenic trioxide 1327-53-3 215-481-4 Sodium dichromate, dihydrate Sodium dichromate, dihydrate 7789-12-0 2,4,6-Trinitro-3,3-dimethyl-5-tert-butylbenzene (Musk xylene) 5-tert-butyl-2,4,6-trinitro-m-xylene (musk xylene) 81-15-2 201-329-4 Bis(2-ethyl(hexyl)phthalate) (DEHP) Bis(2-ethyl(hexyl)phthalate) (DEHP) 117-81-7 204-211-0 Hexabromocyclododecane (HBCDD) Hexabromocyclododecane (HBCDD) 25637-99-4 247-148-4 Alkanes, C10-13, chloro (Short Chain Chlorinated Paraffins) Alkanes, C10-13, chloro (Short Chain Chlorinated Paraffins) 85535-84-8 287-476-5 Bis(tributyltin) oxide Bis(tributyltin) oxide 56-35-9 200-268-0 Lead hydrogen arsenate Lead hydrogen arsenate 7784-40-9 232-064-2 Triethyl arsenate Triethyl arsenate 15606-95-8 427-700-2 Benzyl butyl phthalate Benzyl butyl phthalate 85-68-7 201-622- 1. Anthracene Anthracene, C14H10 White flaky crystals with a pale blue fluorescence. Insoluble in water, slightly soluble in ethanol and ether, more soluble in hot benzene. 　　Used in the production of anthraquinones and dyes, etc. It is mainly used in the production of dye intermediates such as anthraquinones and tannins; it is employed in anthraquinone manufacturing, as well as in applications like insecticides, fungicides, and gasoline antifreeze. High-purity anthracene is used to produce single-crystal anthracene, which is applied in scintillation counters. 　　2. 4,4’-Diaminodiphenylmethane 　　4,4’-Diaminodiphenylmethane, C13H14N2 　　It forms white flaky or needle-like crystals when precipitated from water, and flaky crystals when precipitated from benzene. Slightly soluble in cold water, readily soluble in ethanol, ether, and benzene. 　　Dye raw materials for the production of azo dyes ； Vulcanizing agents and vulcanization accelerators, used for polyurethane rubber and other synthetic rubbers ； Resin: A curing agent used for epoxy resins, with properties similar to m-phenylenediamine ； Monomers for heat-resistant polymers and polyisocyanates ； Organic synthesis intermediates, production of corrosion inhibitors, polyamides ； Wolfram detection reagents, etc. 　　It oxidizes easily in air, causing its color to darken. This substance is toxic and can cause damage to the liver. 　　3. Dibutyl phthalate 　　Dibutyl phthalate, C16H22O4 　　Colorless liquid. Insoluble in water, soluble in organic solvents such as ethanol and ether. 　　It is a common plasticizer for plastics, synthetic rubbers, artificial leathers, etc. It is also a solvent and fixative for spices, and can be used as a repellent for pests; however, its effectiveness is inferior to that of dimethyl phthalate. 　　4. Cobalt dichloride 　　Cobalt dichloride, CoCl2. Cobalt chloride is generally used as a moisture indicator for silica gel desiccants; by adding a certain amount of cobalt chloride to the silica gel, it is possible to determine the degree of moisture absorption by the silica gel. 　　It can also be used in the electroplating industry, as a coloring agent for glass and ceramics, as a paint drying accelerator, in the production of cobalt catalysts, and in the manufacture of invisible/invisible ink. It can additionally be used as a feed additive. 　　CoCl2·6H2O has a molecular weight of 237.93. It appears as pink to red monoclinic crystals. Density is 1.924 g/cm3. Melting point 86°C. Slightly deliquescent. It remains stable at room temperature and turns blue when exposed to heat; it returns to red when cooled in humid air. Soluble in water, alcohol, ether, acetone, and glycerin. Loss of water of crystallization results in an anhydrous form that is a blue powder. 　　Application areas: It is used in instrument manufacturing to produce barometers, hydrometers, moisture indicators, etc. It is used as a coloring agent in the ceramics industry. The coating industry uses it to manufacture paint curing agents. Used in the livestock industry to formulate compound feed. It is used in the brewing industry as a beer foam stabilizer. Defense: The industry is used to manufacture gas masks. Used as a catalyst in chemical reactions. It is used in analytical chemistry for the titrimetric analysis of zinc and in haploid breeding; in addition, it is also used in the production of latent ink, cobalt chloride test strips, and color-changing silica gel. It is also used as an absorbent for ammonia. 　　5. Diarsenic pentaoxide 　　Arsenic pentoxide ； arsenic anhydride ； Arsenic anhydride As2O5 White amorphous solid. Very soluble in water, soluble in ethanol. It is used in the production of drugs, pesticides, metal welding agents, non-ferrous metal glasses, dyes, and also in printing. It is highly toxic. It decomposes at 315°C into arsenic trioxide and oxygen. Deliquesces in air. 　　6. Diarsenic trio*de 　　Arsenic trioxide ； arsenic anhydride ； Arsenic ； white arsenic ； Anhydrous arsenic trioxide As2O3 – used as a deoxidizer and high-temperature clarifying agent in the glass industry, as well as in the production of drugs, pesticides, and herbicides; it is also used for treating wool and in metal extraction. Arsenic is utilized for manufacturing arsenic alloys and in the production of semiconductors. It is also used in the production of arsenic-containing pesticides. It can also be used as a preservative for goods, a scale inhibitor for boilers, and a reagent for chemical analysis. 　　In addition, it is used in industries such as pottery glazing, enamel, coatings, leather preservatives, and dyes. It is highly toxic. The precipitated iron hydroxide, together with slightly burned magnesium oxide, can be used as an antidote. 　　7. Sodium dichromate, dihydrate 　　Dihydrate of sodium dichromate; sodium red sulfate 　　Na2Cr2O7·2H2O 　　Orangish-red monoclinic prismatic crystals or needle-like crystals. Very soluble in water. 　　Used for tanning leather, electroplating, producing chromium pigments, and making matches; it is also used as an enzyme dye and oxidizer. 　　Used in the production of anhydrous chromic acid, potassium dichromate, basic chromium sulfate, chrome yellow, lignosulfonates, etc. Used as a tanning agent, as an oxidizing agent in the dyeing with aniline dyes, as a post-treatment agent in the dyeing with sulfurized reduction dyes, and as a mordant in the dyeing with acid mordant dyes. In the pharmaceutical industry, it is used to produce amines, benzene sulfones, benzocaine, folic acid, rifonul, and others. It is also used for passivation treatment after galvanizing and for metal surface treatment, in the production of basic lake blue dyes, saccharin, synthetic camphor, synthetic fibers, and synthetic fragrances. 　　A strong oxidizing agent. 　　8. 5-tert-Butyl-2,4,6-trinitro-m-xylene (musk xylene) 2,4,6-Trinitro-5-tert-butyl-m-xylene (xylene musk); C12H15N3O6. CH3; HCCCCH33; HC3CH3; NO2; NO2; O2N. It appears as pale yellow needle-shaped crystals with a strong musky odor. 　　It is a synthetic musk used as a fixative in cosmetic fragrances and soap fragrances. 　　9. Bis (2-ethyl(hexyl)phthalate) (DEHP) 　　Bis(2-ethylhexyl) phthalate C24H38O4 　　COO 　　COO 　　CH 　　C H 　　C2H5 　　C2H5 　　(CH2)3CH3 　　(CH2)3CH3 　　Colorless and odorless liquid. Insoluble in water, soluble in ethanol, ether, mineral oil, etc. 　　It is an excellent plasticizer for polyvinyl chloride and vinyl chloride copolymers. 　　10. Hexabromocyclododecane (HBCDD) 　Hexabromocyclododecane, C12H18Br6 　White crystals. There are two isomers: the one with a low melting point has a melting point of 167–168°C, while the one with a high melting point has a melting point of 195–196°C. It has good stability to heat, ultraviolet light, and stability. 　　Used as an additive flame retardant, it is employed as a flame-retardant finishing agent for polystyrene foam plastics, polypropylene, as well as fabrics such as polyester, acrylic, and polypropylene. 　　11. Alkanes, C10-13, chloro (Short Chain Chlorinated Paraffins) Short-chain chlorinated paraffins (C10-13). Based on the chlorine content, they can be divided into four types: 42%, 48%, 50-52%, and 65-70%. The first three are pale yellow viscous liquids, while the latter is a yellow viscous liquid. 42%, 48%, and 50–52% can replace some of the main plasticizers; they not only reduce costs but also endow the products with flame-retardant properties as well as good compatibility. It is widely used in cables, and can also be used to make water pipes, floors, films, synthetic leather, plastic products, and daily necessities. 65–70% 　　Primarily used as a flame retardant, and is used in combination with antimony trioxide in polyethylene, polystyrene, etc. 　　12. Bis(tributyltin) oxide 　　Oxidized bis-tributyltin C24H54OSn2 　　((CH3CH2CH2CH2)3Sn)2O 　　Colorless liquid. Insoluble in water, soluble in common organic solvents. 　　It is used as a fungicide in agriculture; it has strong fungicidal properties and low toxicity. It is used as a protective agent in industries such as timber, papermaking, textiles, and plastering. 　　It is also used as a catalyst in polymerization reactions. 　　Non-corrosive. It reacts chemically with acidic substances. It cannot be used in combination with acidic chemicals. 　　13. Lead hydrogen arsenate 　　PbHAsO4 　　A well-known arsenate insecticide that appeared at the end of the 19th century; it is produced by reacting arsenic acid with lead oxide. It exerts a gastric toxic effect on pests and is used to control pests with chewing mouthparts. It was once a widely used insecticide, but its use declined with the rise of synthetically produced insecticides. It has gradually been replaced by organic pesticides and is no longer in use. 　　14. Triethyl arsenate Triethyl arsenate (C2H5)3AsO4 15. Benzyl butyl phthalate Benzyl butyl phthalate C19H20O4 Primarily used as a plasticizer. It has strong dissolving capacity, good miscibility with polyvinyl chloride resin, vinyl acetate resin, polystyrene, and nitrocellulose. It exhibits good resistance to contamination, fast plasticization speed, a high capacity for fillers, as well as resistance to water and oil extraction. It can be used as a plasticizer. It is often used in combination with other plasticizers in plastic flooring, decorative materials, corrugated boards, etc., which contain large amounts of fillers. 　　This substance is used in the manufacture of films, sheets, and pipes, enabling the production of products with excellent transparency and a smooth surface. It is also used in the calendering process to produce foam-based artificial leathers.
Chinese Name:
Substance Name:
CAS Number:
EC Number:
Anthracene: 120-12-7; 204-371-1
4,4’-Diaminodiphenylmethane: 101-77-9; 202-974-4
Dibutyl phthalate: 84-74-2; 201-557-4
Cobalt dichloride: 7546-79-9; 231-589-4
Diarsenic pentoxide: 1303-28-2; 215-116-9
Diarsenic trioxide: 1327-53-3; 215-481-4
Sodium dichromate, dihydrate: 7789-12-0; 2,4,6-Trinitro-3,3-dimethyl-5-tert-butylbenzene (musk xylene): 81-15-2; 201-329-4
Bis(2-ethyl(hexyl)phthalate) (DEHP): 117-81-7; 204-211-0
Hexabromocyclododecane (HBCDD): 25637-99-4; 247-148-4
Alkanes, C10-13, chloro (Short Chain Chlorinated Paraffins): 85535-84-8; 287-476-5
Bis(tributyltin) oxide: 56-35-9; 200-268-0
Lead hydrogen arsenate: 7784-40-9; 232-064-2
Triethyl arsenate: 15606-95-8; 427-700-2
Benzyl butyl phthalate: 85-68-7; 201-622-7
􀂙Norway’s “Prohibition on Certain Hazardous Substances in Consumer Products”􀂙 PoHS: Prohibition on Certain Hazardous Substances in Consumer Products. Expected to be adopted on December 15, 2007, and take effect on January 1, 2008. Scope of application: Almost all consumer products (with a few exceptions). The product categories included range from electrical and electronic consumer goods to clothing, bags, construction materials, toys, and more. This regulation does not apply to food and food packaging, fertilizers, medical equipment, and cigarettes, as well as to fixtures on vehicles, tires, and other similar vehicle components. 􀂙Hazardous substances under PoHS control: The new regulations recommend restricting 18 substances, of which only 2 (lead and cadmium) are included in the EU RoHS directive; in addition, 16 other substances are specified as being prohibited from use. Percentage limits for classified substances: 1. Brominated flame retardants: Hexabromocyclododecane HBCDD – 0.1; Tetrabromobisphenol A TBBP-A – 1; Chlorinated paraffins C14-17; Chlorinated paraffins C14-17 MCCP – 0.1. 2. Metals and metal compounds: Arsenic and its compounds – As – 0.01; Lead and its compounds – Pb – 0.01; Cadmium and its compounds – Cd – 0.01. 3. Organotin compounds: Tributyltin TBT – 0.001; Triphenyltin TPT – 0.001. 4. Aromatic compounds: Musk xylene – 0.05; Musk ketone – 0.05; Perfluorinated compounds: Ammonium perfluorooctanoate PFOA – 0.005. 5. Surfactants: Bis(hydrogenated tallow alkyl)dimethylchloroamine DTDMAC; Diestearyldimethylchloroamine DODMAC/DSDMAC; Di(hydrogenated tallow)dimethylchloroamine DHTDMAC – total 0.1. 6. Others: Bisphenol A, also known as bisphenol propane – 0.005 (currently); 0.0025 (in three years). Di(2-ethylhexyl) phthalate DEHP – 0.1; Pentachlorophenol – 0.1; Triclosan – 0.001. 7. Substances of particular concern: 1. Tetrabromobisphenol A: Widely used in printed circuit boards (PCBs), as well as in plastics, rubber, textiles, fibers, and paper. It can also be used as a reactive brominated flame retardant in the production of brominated epoxy resins and brominated polycarbonates. Additionally, it functions as an additive flame retardant in epoxy resins, ABS, HIPS, AS, etc. Harm: —Prolonged exposure hinders brain and bone development ； —When incinerated, it releases brominated dioxins and furans that are carcinogenic ； —Harms the hormone system. 2. Tetrabromobisphenol A – Regulatory limits set by other well-known companies: DELL: By 2009, all new products were not to contain brominated flame retardants, including TBBPA in circuit boards. HP: As of January 1, 2007, the content of TBBPA in the plastics on the outside of products was limited to 1000 ppm; the same requirement applied to PCBs and printed circuit boards. 3. Hexabromocyclododecane: Hexabromocyclododecane (HBCD) is an additive flame retardant, accounting for up to 74.7% of its composition. HBCD has a high flame-retardant efficiency and good flowability; it is soluble in common solvents. It is primarily used as a flame retardant in PS foam plastics, HIPS, adhesives, coatings, and polypropylene fibers. It does not need to be used in combination with antimony oxide as a synergist. Although HBCD offers excellent flame-retardant properties, it can pose potential long-term risks to humans and the environment. International environmental organizations have included it on the list of the Stockholm Convention on Persistent Organic Pollutants (POPs) ； Currently, countries around the world, especially developed ones, are actively controlling the production and emissions of HBCD. Companies are now being regulated: Lenovo’s approach is EPA3540C. 4.MCCP for medium-chain chlorinated paraffins (C14-C17). Chlorinated paraffins (CPs) are a very complex mixture, usually classified into several groups depending on the chain length of the raw materials and the amount of chlorine present in the substance. The three main categories include short-chain chlorinated paraffins (SCCPs), medium-chain chlorinated paraffins (MCCPs), and long-chain chlorinated paraffins (LCCPs). Chlorinated paraffins are suitable for flame retardancy in various products. It is widely used in industries such as plastics, rubber, and fibers as a plasticizer, as a surface treatment agent for fabrics and packaging materials, as an additive to adhesives and coatings, as an anti-wear agent for high-pressure lubrication and metal cutting processes, as a mildew inhibitor and waterproofing agent, and as an additive in inks. Treatment method: EPA3540C. 5. Organotin compounds (TBT, TPT). Organotin compounds were originally developed as stabilizers for PVC, and later were widely used as biocides. Its areas of application include: – Being applied to ship hulls as an agent to prevent fouling; – Used in textiles as a deodorant and antimicrobial treatment agent; – Used in wooden products as a preservative. – dibutyl tin (DBT) is primarily used as an intermediate in the synthesis of stabilizers for polymer materials such as PVC. Hazards of organotin compounds: – Harmful to humans and highly toxic to aquatic organisms; – Can damage the immune system; – May cause damage to the reproductive system. Treatment method: DIN38407-13. 6. Bisphenol A, also known as bisphenylpropane, is synthesized from phenol and propylene in an acidic medium. It is an important raw material for products such as epoxy resins, polycarbonates, polysulfones, polyarylates, phenolic resins, unsaturated polyester resins, and flame retardants. This substance mimics human estrogen, altering brain structure and chemicals, as well as the immune system and reproductive organs ； Even low levels of bisphenol A are associated with malformations in the mammary glands, prostate, and eggs of laboratory animals. In addition to accelerating puberty, it can also lead to obesity as well as diseases such as breast and prostate cancer. Testing method: EN71 ； ISO8974-2004 Testing instrument: HPLC/DAD. 7. DEHP – Di(2-ethylhexyl) phthalate. Phthalates are primarily used as plasticizers in plastic materials, to increase the plasticity of plastics, improve the flowability of resins during processing, and endow the resulting products with flexibility. 􀂙 Phthalates can affect human hormones, impact child development, and disrupt hormone secretion ； It may also damage organs in the human body such as the liver and kidneys, and poses a risk of causing cancer. 􀂙Detection of phthalates: Extraction method: ASTM D3421 EPA3540C; Analytical instrument: GC-MS. Last edited by lifanwang on 2009-3-6 18:52.]

CoCl2·6H2O has a molecular weight of 237.93; it appears as pink to red monoclinic crystals. Density is 1.924 g/cm3. Melting point 86°C. Slightly deliquescent. It remains stable at room temperature and turns blue when exposed to heat; it returns to red when cooled in humid air. Soluble in water, alcohol, ether, acetone, and glycerin. The anhydrous form, which loses its crystalline water and turns into a blue powder. Application areas: It is used in instrument manufacturing to produce barometers, hydrometers, moisture indicators, etc. It is used as a coloring agent in the ceramics industry. It is used in the coating industry to manufacture paint drying agents. Used in the livestock industry to formulate compound feed. It is used in the brewing industry as a beer foam stabilizer. The defense industry is used to manufacture gas masks. Used as a catalyst in chemical reactions. It is used in analytical chemistry for the titrimetric analysis of zinc and in haploid breeding; furthermore, it is employed in the production of latent ink, cobalt chloride test strips, and color-changing silica gel. It is also used as an absorbent for ammonia. Quantification is carried out by complexometric titration with EDTA. Cobalt dichloride (GB 1270; last edited by lifanwang on 2009-3-5 20:59)

National standard code: 61010 　　CAS number: 1303-28-2 　　Chinese name: Arsenic pentoxide 　　English name: Arsenic oxide； Arsenic anhydride Alternative name: Arsenic acid anhydride Molecular formula: As2O5 Appearance and properties: White amorphous solid that is hygroscopic Molecular weight: 229.84 Vapor pressure Melting point: 315°C (decomposition) Solubility: Soluble in water, ethanol, acids, and bases Density: Relative density (air=1): 4.32 Stability: Stable Hazard symbol: 13 (Highly toxic inorganic substance) Main uses: Used in the production of drugs, pesticides, metal welding agents, and non-ferrous metal glasses

Chemical formula: As2O3 　　National standard code: 61007 　　CAS number: 1327-53-3 　　Chinese name: Arsenic trioxide 　　English name: Arsenic trio*de； Anhydrous arsenic acid 　　Alternative names: arsenic oxide, anhydrous arsenic acid, arsenic, white arsenic, arsine anhydride 　　Molecular weight: 197.84 　　Properties: It can exist in three forms – amorphous crystals, isometric crystals, or monoclinic crystals – or as a colorless powder. They are easily reduced as well as easily oxidized. 　　Melting point: Arsenide – 275°C; White arsenic – 313°C. Boiling point: 457.2°C. Vapor pressure: 13.33 kPa (at 332.5°C). Solubility: Slightly soluble in water (at 25°C, 1 g of the substance can dissolve in between 100 ml and 1000 ml of water); soluble in acids and bases. Density: Relative density (water = 1) – 3.86. Stability: Stable. Hazard symbol: 13 (highly toxic inorganic substance). Main uses: Used in the glass, enamel, and pigment industries, as well as in insecticides and leather preservatives. Amorphous form (vitreous arsenic): A colorless, amorphous glass-like substance. Unstable, and can slowly transform into the isometric crystal system. 　　Arsenolite: small white isometric octahedral crystals (powder). It is the most stable even at room temperature. Sublimes at 135°C and transforms to the monoclinic crystal system at 221°C. 　　Claudetite is a colorless, needle-shaped crystal belonging to the monoclinic crystal system, and it remains stable at temperatures above 221°C. Health hazards: Routes of exposure: inhalation, ingestion. 　　Health hazards: It primarily affects the nervous system and capillary permeability, and has an irritating effect on the skin and mucous membranes. 　　Acute poisoning: Oral ingestion leads to nausea, vomiting, abdominal pain; the stool may sometimes contain blood; there are painful spasms in the limbs, reduced urination, coma due to anuria, convulsions, and death as a result of respiratory paralysis. Peripheral neuropathy can occur within 1–3 weeks of acute poisoning. Toxic myocarditis and hepatitis can occur. High inhalation amounts can also cause acute poisoning, but gastrointestinal symptoms are mild, with M lines appearing on the fingernails (toenails). 　　Chronic poisoning: gastrointestinal symptoms, liver and kidney damage, skin pigmentation, hyperkeratosis or verrucous hyperplasia, as well as polyneuritis. It can cause lung cancer and skin cancer.

Chinese name: Sodium dichromate English name: sodium dichromate Alternative Chinese name: Red vitriol sodium CAS No.: 7789-12-0 Molecular formula: Na2Cr2O7·2H2O Molecular weight: 297.99 Physical and chemical properties Main component: Content: For industrial grade, grades 1 and 2 have a purity of ≥98.0%. 　　Appearance and properties: Orange-red crystals, readily deliquescent. 　　Melting point (°C): 357 (anhydrous) Boiling point (°C): 400 (anhydrous, decomposition) Relative density (water=1): 2.35 Solubility: Soluble in water, insoluble in alcohol. 　　Main uses: Used in printing and dyeing, leather processing, chemicals, pharmaceuticals, electroplating, etc. 　　Health hazards: Acute poisoning: Inhaling it can cause acute respiratory irritation, nosebleeds, hoarseness, atrophy of the nasal mucosa, and sometimes asthma and cyanosis. In severe cases, chemical pneumonia can occur. Oral administration can irritate and corrode the digestive tract, causing nausea, vomiting, abdominal pain, bloody stools, etc ； In severe cases, symptoms such as difficulty breathing, cyanosis, shock, liver damage, and acute renal failure may occur. Chronic effects: include contact dermatitis, chromium ulcers, rhinitis, nasal septum perforation, and respiratory inflammation. 　　Fire and explosion hazard: This product acts as an accelerant, is a carcinogen, and is highly corrosive and irritating; it can cause burns to the human body. 　　First aid measures Skin contact: Remove contaminated clothing and thoroughly wash the skin with soapy water and clean water. 　　Eye contact: Lift the eyelids and rinse with flowing water or saline. Seek medical attention. 　　Inhalation: Immediately move to a place with fresh air. Keep the airways clear. If there is difficulty breathing, administer oxygen. If breathing stops, perform artificial respiration immediately. Seek medical attention. 　　Ingestion: Rinse the mouth with water, and wash the stomach with plain water or a 1% sodium thiosulfate solution. Give milk or egg white to drink. Seeking medical attention 《HG/T 3439-2000 Chemical Reagents – Sodium Dichromate》 Last edited by lifanwang on 2009-3-5 21:04 ]

Xylene musk: Xylene musk is a type of artificial musk. The scientific name is 2,4,6-trinitro-5-tert-butyl-m-xylene. Pale yellow needle-like crystals. Melting point 112.5-114.5°C. Boiling point: 200-202°C. It has a strong musky scent. Used as a fixative in cosmetic fragrances and soap fragrances, etc. It is prepared by reacting tert-butyl chloride with m-xylene in the presence of aluminum chloride to yield 1,3-dimethyl-5-tert-butylbenzene, which is then nitrated with concentrated nitric acid. 　　Xylene musk is also used as a transdermal agent in many traditional Chinese medicine plasters, thereby enhancing the absorption of the drugs through the skin. It has sedative and analgesic effects. Although it is called artificial musk, it is a single compound, unlike natural musk which is a multi-component mixture. The drugs made from musk contain prasterone, and are classified as stimulants; therefore, their use is subject to certain restrictions. Xylene musk, on the other hand, allows these restrictions to be bypassed, which has drawn the attention of some industry professionals. Gas chromatography analysis of xylene musk http://www.ehsy.com/pic_lib/2008/07/31/1217484606.jpg Western Region order number: L2431780 Product name: Xylene musk Product description: The standards provided by EHSY lab offer excellent performance and can meet the various requirements of different working environments. As a partner to many well-known brands, EHSY lab ensures the occupational health of your employees, a safe working environment, and a bright future through its excellent quality and services. Note: The product price includes 17% VAT, but does not include domestic delivery fees. Search keywords: Musk xylene CAS: 81-15-2 Standard sample, Reference material. List of product specifications – Request for quote (check). Order number for Western Regions. Technical specifications, Price (RMB). Indication of compliance with standards: L2431780 Xylenemusk ； Musk xylene ； CAS: 81-15-2 ； Specification: Pure product ； Packaging: 0.1g Last edited by lifanwang on 2009-3-5 21:07]

【Chinese Name】Di(2-ethylhexyl)(o-)phthalate 【English Name】di(2-ethylhexyl)(o-)phthalate 【CAS Number】【Molecular Formula】【Molecular Weight】【Density】Relative density 0.9861 (20/20°C) 【Melting Point】-55 【Boiling Point】231 (0.665 kPa) 【Flash Point】【Viscosity】【Vapor Pressure】【Refractive Index】【Toxicity LD50】【Properties】Colorless and odorless liquid. 【Solubility】Insoluble in water; soluble in ethanol, ether, mineral oil, etc. 【Use】It is an excellent plasticizer for polyvinyl chloride and vinyl chloride copolymers. 【Preparation or Source】It is prepared by the esterification of phthalic anhydride and 2-ethylhexanol under heating. Gas chromatography can be used for analysis

Hexabromocyclododecane Name: Hexabromocyclododecane; HBCD; hexabromocyclododecane Information: Hexabromocyclododecane is abbreviated as HBCD; it has a molecular weight of 632 and appears as white crystals. 　　There are two isomers: the one with a low melting point has a melting point of 167–168°C, while the one with a high melting point has a melting point of 195–196°C. It has good stability to heat, ultraviolet light, and other factors. Bromine content: 74.7%. Soluble in methanol, ethanol, propane, and amyl acetate. Dehydrobromination begins at 170°C, and it becomes intense at 190°C. LD50 40,000 mg/kg. 　　Molecular formula: C12H18Br6. Applications: Used for flame retardancy in polypropylene plastics and fibers, polystyrene foam plastics; it can also be used for flame retardant post-treatment of polyester fabrics, as well as for flame retardancy in vinyl-coated two-sided leather. Used as an additive combustion promoter, suitable for polystyrene, unsaturated polyester, polycarbonate, polypropylene, synthetic rubber, etc. 　　CAS number 3194-55-6. Hexabromocyclododecane (HBCD) is a cyclic alkane-based flame retardant with a high bromine content; it features low usage levels, excellent flame-retardant effects, and minimal impact on the physical properties of materials. It is mainly used in EPS (expanded polystyrene, with a recommended usage of 2%), polypropylene (with a recommended usage of 2% HBCD and 1% antimony trioxide), and other styrene resins, where its excellent properties are particularly evident. In addition, it is suitable for flame-retardant treatment of knitted fabrics, styrene-butadiene rubber, adhesives, coatings, as well as unsaturated polyester resins. 　　Although hexabromocyclododecane (HBCD) offers excellent flame-retardant properties, it can pose potential long-term risks to humans and the environment. Hexabromocyclododecane (HBCD) is listed as a substance under Norway’s PoHS regulation, and it is also covered by the EU’s REACH regulation. 　　Properties of thermally stable hexabromocyclododecane Thermally stable hexabromocyclododecane is a modified version of the hexabromocyclododecane flame retardant. This product is a white crystalline powder that is soluble in organic solvents such as acetone and esters, and it exhibits good stability to heat and ultraviolet light. This product offers a better flame-retardant effect than brominated aromatic flame retardants, and it possesses excellent thermal stability, which makes processing equipment safer and improves the performance of the final products. It is particularly suitable for plastic products that are processed at higher temperatures. The flame-retardant engineering plastic containing this product can be used in various injection molding and extrusion applications, meeting various processing requirements; it is a specialized flame retardant for polystyrene foam plastics and polypropylene fibers. It can also be used as a flame-retardant additive for plastics such as polyethylene, polycarbonate, and unsaturated polyester. This product is also widely used as a flame retardant for other organic materials. 　　Technical specifications for thermally stable hexabromocyclododecane:
Appearance: White or light grayish-white powder
Bromine content: ≥72%
Melting point: 185–195°C
Decomposition temperature: ≥240°C
Volatile matter: (105°C, 2 hours) ≤0.5%
Colority: ≤40

Uses of thermally stable hexabromocyclododecane:
This product is an additive-type flame retardant, primarily used as a flame retardant in polystyrene (at a dosage of 2%), polypropylene (at a dosage of 2% plus 1% antimony trioxide), high-impact polystyrene, polypropylene, ABS, polyethylene, polycarbonate, and unsaturated polyester.

Short-chain chlorinated paraffins English name: Alkanes, C10-13, chloro (Short Chain Chlorinated Paraffins) Molecular formula: C10-13 They can be classified according to their chlorine content into four types: 42%, 48%, 50-52%, and 65-70%. The first three are pale yellow viscous liquids, while the latter is a yellow viscous liquid. 　　42%, 48%, and 50–52% can replace some of the main plasticizers; they not only reduce costs but also endow the products with flame-retardant properties as well as good compatibility. 　　It is widely used in cables, and can also be used to make water pipes, floors, films, synthetic leather, plastic products, and daily necessities. 65–70% is primarily used as a flame retardant, mixed with antimony trioxide in polyethylene, polystyrene, and others.