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Chinese name: Paraformaldehyde alias: polyformic aldehyde; Polyformaldehyde; Paraformaldehyde; Solid formaldehyde; Paraformaldehyde; Polyoxymethylene CAS No.: 30525-89-4 Molecular formula: HO (CH2O) nOH, n=10-100 Appearance and property: low molecular weight is white crystalline powder, with formaldehyde odor Molecular weight: (30) n Vapor pressure: 0.19kPa/25 ℃ Flash point: 70 ℃ Melting point: 120~170 ℃ Solubility: insoluble in ethanol, slightly soluble in cold water, soluble in dilute acid and alkali Density: relative density (water=1) 1.39; Relative density (air=1) 1.03 Stability: Stable environmental impact 1. Health hazard invasion pathway: inhalation, ingestion, percutaneous absorption. Health hazard: This product is strongly irritating to the respiratory tract, causing rhinitis, pharyngitis, pneumonia and Pulmonary edema. It has a sensitization effect on the respiratory tract. Direct eye contact can cause burns. Irritating to the skin, causing redness and swelling. Oral administration strongly stimulates the skin, causing dryness, cracking, and peeling after prolonged repeated contact. 2、 Toxicological data and environmental behavior Acute toxicity: LD501600mg/kg (oral toxicity in rats) Hazard characteristics: In the event of open flames, high heat, or contact with oxidants, there is a risk of combustion. Thermal decomposition releases flammable gases that can form explosive mixtures with air. Powder and air can form explosive mixtures, and when they reach a certain concentration, they will explode when encountering Mars. Combustion (decomposition) products: carbon monoxide, carbon dioxide. Disposal method 1: emergency treatment of leakage Isolate the leakage pollution area, set up Warning sign around it, and cut off the fire source. It is recommended that emergency personnel wear Gas mask and general fire protection clothing. Collect in a dry, clean, and covered container using spark free tools and transport to a waste disposal site. If there is a large leakage, wet it with water and store it for recycling. 2、 Protective measures Respiratory protection: wear Dust mask. Wear Gas mask when necessary. Eye protection: Wear safety goggles. Protective clothing: Wear corresponding protective clothing. Hand protection: Wear protective gloves. Other: Smoking, eating, and drinking are prohibited at the workplace. After work, take a shower and change clothes. Pay attention to personal cleanliness and hygiene. 3、 First aid measures for skin contact: Remove contaminated clothing and rinse thoroughly with soap and water. Eye contact: Immediately lift the eyelids and rinse with flowing water or physiological saline for at least 15 minutes. Seek medical attention. Inhalation: Quickly remove from the scene to a place with fresh air. Maintain unobstructed respiratory tract. Give oxygen when breathing is difficult. When breathing stops, immediately perform artificial respiration. Seek medical attention. Ingestion: If taken by mistake, drink a large amount of warm water to induce vomiting and seek medical attention. Extinguishing method: foggy water, foam, carbon dioxide, dry powder, sand. Use Paraformaldehyde with low polymerization degree to replace ordinary industrial formaldehyde aqueous solution. In the synthesis of pesticides, synthetic resins, coatings, fumigation disinfectants and other various formaldehyde downstream products, it can not only reduce the energy consumption of dehydration, but also greatly reduce the amount of wastewater treatment. This is a green environmental protection project that benefits the country and the people. Low polymerization degree Paraformaldehyde is a solid particle because it is higher than the Active ingredient of industrial formaldehyde, which is conducive to the application of chemical synthesis, pharmaceutical and other industrial fields, especially in the synthesis requiring the use of anhydrous formaldehyde as raw material. It can also be used as disinfectants, fungicides, fumigants, and herbicides, as well as in the manufacturing of resins and artificial ivory- Industry - used in synthetic resin, adhesive, coating and other industries - used in the production of herbicides: glyphosate, Alachlor, Butachlor, Acetochlor, clotrimamide and other Paraformaldehyde - pesticides - used in the production of pesticides: Tetramethrin, phorate, etc. - used in the production of pesticides: tricyclazole, triadimefon, mianlong, ornithol, etc. - used in plant growth regulators: glyphosate - medicine - used in wards Disinfection organic raw materials for clothes and bedding: used to prepare Pentaerythritol, trimethylolpropane, glycerin, acrylic acid, methyl acrylate, methacrylic acid, N-hydroxy Methacrylamide, etc.


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