How are your chemical reagents stored in the laboratory?

The following content is quoted from page P421 of "Laborator's Reader, Third Edition". I'll type and learn along the way. * Next, paste it along the way. Colleagues in CTRL+c also come together. 2. Management of chemicals There are many types of chemicals and reagent solutions required in laboratories. Most of the chemicals have certain toxicity and danger. Strengthening their management is not only a need to ensure the quality of analysis data, but also a need to ensure safety. The laboratory should only store a small amount of medicines that are needed in the short term. Chemicals must be classified when stored. Inorganic substances can be classified according to acids, bases, and salts. Salts can be arranged according to the metal elements of the periodic table, such as potassium salts, sodium salts, etc. Organic substances can be classified according to functional groups, such as hydrocarbons, alcohols, phenols, aldehydes, acids, etc. In addition, it can also be classified according to application, such as benchmarks, indicators, chromatographic fixatives, etc. 1. Chemicals that are dangerous goods 1) Explosive and unstable substances. Such as concentrated hydrogen peroxide, organic peroxides, etc. 2) Oxidizing substances. Such as oxidizing acids and hydrogen peroxide also fall into this category. 3) Flammable substances. In addition to flammable gases, liquids, and solids, it also includes substances that produce flammable substances in moisture. Such as alkali metal hydrides, calcium carbide and substances that ignite spontaneously when exposed to air, such as white phosphorus. 4) Toxic substances. See Section 4 for details. (sic) 5) Corrosive substances. Such as acid, alkali, etc. 6) Radioactive materials. 2. Laboratory reagent storage requirements 1) Flammable and explosive reagents should be stored in iron cabinets (wall thickness more than 1mm), with ventilation holes on the top of the cabinet. It is strictly prohibited to store bottles of flammable liquids larger than 20L in the laboratory. Do not place flammable and explosive drugs in the refrigerator (except explosion-proof refrigerators). 2) Two or more compounds that can react violently, burn, explode, or release toxic gases after mixing or contacting each other are called incompatible compounds and cannot be mixed. Most of these compounds are strongly oxidizing and reducing substances. 3) Corrosive reagents should be placed in plastic or enamel trays or barrels to prevent accidents caused by bottle breakage. 4) Pay attention to the storage period of chemicals. Some reagents will gradually deteriorate during storage and even form hazardous substances. Ethers, * * Furans, dioxane, olefins, liquid paraffin, etc. can form peroxides if they come into contact with air under light conditions, and the longer they are left, the more dangerous they become. Diethyl ether, isopropyl ether, butyl ether, * * The storage period of furan, dioxane, etc. without adding inhibitors (hydroquinone, pyrogallol, ferrous sulfate, etc.) should not exceed one year. If 1,2,3-phloroglucinol is added to opened bottles of ether (0.1 mg per 100 mL), the storage period can be up to two years. 5) Medicine cabinets and reagent solutions should be kept away from direct sunlight and away from heat sources such as heaters. Reagents that require protection from light should be packed in brown bottles or wrapped in black paper or black cloth and stored in a dark cabinet. 6) If you find that the label on the reagent bottle has fallen off or is about to become blurred, attach the label immediately. Reagents without labels or with illegible labels must be re-identified as dangerous goods and handled with care. Do not throw them away casually to avoid serious consequences. 7) Highly toxic drugs should be locked in special drug cabinets, and a system requiring application, approval, and double registration and signature should be established for use. Let's find fault! If you find any typos, I will correct them and I will add one point each time. (I can only add 3 points every 24 hours, and I can only add 1 point to 1 point. sweat) another: Google Pinyin Input Method 2.0 is recommended for typing. It took me 20 minutes to type, please encourage me. This post was last edited by thong0421 on 2009-2-26 21:59 ]

Usually liquid reagents are stored in glass bottles, and solids are stored in plastic bottles.； Strongly corrosive, volatile, toxic and other reagents need to be stored separately

For solutions, it is best to prepare them freshly and use them immediately, and the indicator should indicate the expiration date! Store solid samples in a dry and ventilated place, and store drugs that easily absorb moisture in a desiccator!

Liquid and solid reagents are kept in classified categories and managed by dedicated personnel. To receive, you need to fill in the record of use. For highly toxic and dangerous goods, sulfuric acid is managed by two people and two keys. To receive, you need to fill in the record of use. The use record must be kept for three years.

Freshly purchased, unopened, solid and odorless products can be placed in the same cabinet, and liquids can be placed in a medicine cabinet. The prepared solutions, such as standard solutions, should be labeled, named, and used on the laboratory bench. The indicator should be placed as required. If it is stored at low temperature, put it in the refrigerator or in a dark place in a cupboard. Generally speaking, as long as the properties are stable and not easy to volatilize, the sealed number can be put together

Dedicated personnel, dedicated places, and dedicated reagent cabinets are required for standardized storage.

A few words about the storage area and management of highly toxic drugs: 1. The highly toxic drug warehouse and storage boxes must be managed by two people at the same time. Double lock, two people arrive at the same time to open the lock. 2. Personnel who store highly toxic drugs must be familiar with the relevant physical and chemical properties of highly toxic drugs in order to properly control the temperature and ventilation of the warehouse. 3. Strictly implement the inspection system for chemical reagents in the warehouse. Regular inspections of reagents in stock must be carried out. If any deterioration or abnormality is found, the cause must be analyzed, storage conditions and protection measures should be improved, and relevant departments should be notified in a timely manner. 4. Distribution of highly toxic drugs shall be based on the first-in, first-out principle, and accurate registration shall be carried out during distribution (measurement of reagents, distribution time and handler). 5. All units must be picked up by two people and returned by two people. Otherwise, the custodian of the highly toxic drug warehouse has the right not to issue the drug. 6. When receiving highly toxic drug reagents, you must apply and report in advance, receive as much as you need, and prepare the reagents at one time. 7. When using highly toxic reagents, you must strictly abide by the analysis operating procedures. 8. Personnel who use highly toxic reagents must wear work clothes, protective glasses, gloves and other labor protection equipment. 9. Waste liquid generated after use is not allowed to be poured into the pool casually. It should be poured into the designated waste liquid bucket or bottle. Waste liquid must be disposed of on the same day and cannot be stored. 10. The waste liquid generated must be neutralized chemically in a designated safe place. 11. Establish waste liquid treatment records, including: Amount of waste liquid, treatment method, treatment time, location, and handler.

Commonly used ones are easy to handle, but those containing gas and corrosive ones should be kept separately.

The main principle is classified management based on safe storage. Reagent library: The preservation and management of highly toxic drugs shall be in accordance with relevant regulations, and shall be managed by two people and two keys. When receiving, a receipt record shall be filled in, and use records shall be filed for three years. Liquid and solid reagents shall be kept in categories and managed by dedicated personnel. A receipt record shall be filled in when receiving. For ease of use, solid reagents are stored separately according to salt categories such as sodium salt, potassium salt or indicator. Standard substances and perishable reagents are stored in desiccators. The mother liquor of the prepared standard solution is stored in a unified manner, and the receipt record is filled in when used. Laboratory workshop: Acids, organic and solid reagents, standard solution diluents, etc. taken out to the laboratory are stored in special reagent cabinets in each laboratory.