What are the safety regulations for 20% ethylene glycol solutions?

Search for MSDS on Baidu. 1. Physical and chemical properties of the substance: National standard code: CAS: 107-21-1; Chinese name: Ethylene glycol; English name: Ethylene glycol; Alternative names: Glycerol; Molecular formula: C2H6O2； HOCH2CH2OH Molecular weight: 62.07 Melting point: -13.2°C Boiling point: 197.5°C Density: Relative density (water=1): 1.11 ； 　 　Vapor pressure: 6.21 kPa at 20°C; Flash point: 110°C. Solubility: Miscible with water, and can also be mixed with ethanol, ether, etc. Stability: Stable. Appearance and properties: Colorless, odorless, sweet-tasting, viscous liquid. Hazard symbols: None. Uses: Used in the production of resins, plasticizers, synthetic fibers, cosmetics, and **; also used as a solvent and in the formulation of antifreeze for engines. 2. Environmental impact: (1) Health hazards; Routes of exposure: Inhalation, ingestion, dermal absorption. Health hazards: No reports of acute or chronic poisoning from this substance have been seen in China. Acute poisonings abroad are often due to misreporting. Inhalation poisoning is characterized by recurrent episodes of syncope, and may be accompanied by nystagmus and an increase in lymphocytes. Acute poisoning after oral ingestion occurs in three stages: the first stage is characterized by symptoms affecting the central nervous system; in mild cases, these symptoms are similar to those of ethanol poisoning, while in severe cases, coma and convulsions occur rapidly, leading ultimately to death ； In the second stage, cardiopulmonary symptoms are prominent; severe cases may present with pulmonary edema, bronchopneumonia, and heart failure ； The third stage is primarily characterized by renal failure to varying degrees. The estimated lethal dose for humans when taken orally in a single dose is 1.4 ml/kg (1.56 g/kg). (2) Toxicological data and environmental behavior: Toxicity: It belongs to the low-toxicity category. Acute toxicity: LD50 8.0–15.3 g/kg (oral, mice) ； 5.9～13.4g/kg (oral, rats) ； 1.4 ml/kg (oral, lethal in humans). Subacute and chronic toxicity: After 8 days of inhalation of 12 mg/m3 (repeatedly), 2 out of 15 rats developed corneal opacity and blindness ； 9 out of 28 people who inhaled a 40% ethylene glycol mixture experienced brief loss of consciousness ； After inhaling a 40% ethylene glycol mixture heated to 105°C, nystagmus occurred in 14/38 individuals, and lymphocytosis was observed in 5/38 individuals. Hazardous properties: It poses a risk of fire and explosion when exposed to open flames, high temperatures, or oxidizing agents. In the event of high temperatures, the pressure inside the container increases, posing a risk of cracking and explosion. Combustion (decomposition) products: carbon monoxide, carbon dioxide. 3. On-site emergency monitoring methods 4. Laboratory monitoring methods: Magenta sulfite method, “Methods for Determining Hazardous Substances in the Air of Chemical Enterprises”, Chemical Industry Press; Chromotropic acid method, “Methods for Determining Hazardous Substances in the Air of Chemical Enterprises”, Chemical Industry Press 5. Environmental standards: Former Soviet Union – Maximum allowable concentration of hazardous substances in workshop air: 5 mg/m3. Former Soviet Union (1975) – Maximum allowable concentration of hazardous organic substances in water: 1.0 mg/L; Odor threshold concentration: 90 mg/m3 6. Emergency response measures: (1) Emergency response to leaks – Cut off the source of fire. Wear a self-contained breathing apparatus and standard fire protection clothing. Do not come into direct contact with the leak; seal it up only when safety is ensured. Rinse with plenty of water, and pour the diluted wash solution into the wastewater system. In the event of a large-scale spill, it should be contained using dikes, and then collected, transferred, recycled, or disposed of after being rendered harmless. (2) Protective measures: Respiratory protection: No special protection is generally required; an self-contained breathing apparatus can be worn in case of exposure to high concentrations. Eye protection: Wear safety goggles if necessary. Protective clothing: Wear work clothes. Hand protection: Wear chemical-resistant gloves if necessary. Other: Take a shower after work**. Avoid prolonged and repeated exposure. Regular health check-ups. (3) First aid measures: Skin contact: Remove contaminated clothing and rinse with flowing water. Eye contact: Immediately lift the upper and lower eyelids and rinse with flowing water for 15 minutes. Inhalation: Quickly move to a place with fresh air. Seek medical attention immediately. Ingestion: In case of accidental ingestion, wash the stomach with large amounts of water or saturated soda water. Seek medical attention. Fire extinguishing methods: fog water, foam, carbon dioxide, dry powder, sand. Relatively speaking, propylene glycol has lower toxicity, but its higher price hinders its replacement of ethylene glycol; however, in the long term, the hazards associated with ethylene glycol are receiving increasing attention. Last edited by eleg on 2009-3-26 08:11]

It cannot be allowed to be leaked from any perspective