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    Acetic anhydride
    Product name
    Acetic anhydride
    Alias
    Acetic anhydride, acetic anhydride
    Place of origin
    China
    Molecular formula : C4H6O3
    Molecular weight : 102.09
    Physicochemical properties
    Appearance & Properties: A colorless, transparent liquid with a pungent odor; its vapor is a tear gas.
    Melting point (°C): -74.13 Relative density (water = 1): 1.08
    Boiling point (°C): 138.6 Relative density (air = 1): 3.52
    Saturated vapor pressure (KPa): 1.33 (°C) Heat of combustion (KJ/mol): 1804.5
    Critical temperature: (°C) 326 Critical pressure: ( KPa ): 4.36
    Flash point: 49
    Solubility: Soluble in ethanol, ether, benzene.
    Toxicity and protection

    Inhalation has a stimulating effect on the respiratory tract, causing cough, chest pain, and difficulty breathing. Vapor is irritating to the eye and can cause burns. Abdominal pain, nausea, vomiting, and shock occur orally. The vapor forms an explosive mixture with the air, causing a combustion explosion in the event of an open flame or high heat. Contact with oxidant reacts strongly to cause combustion. Accidental release measures: evacuate personnel and restrict access. Cut off the fire source. Handling personnel wear emergency protective equipment and cut off the source of leakage as much as possible. Rinse with a small amount of water, dilute the wash water and put it into the waste system. When a large number of buildings are built, dikes or digging pits are constructed. Use an explosion-proof pump to transfer to a tank truck or special collector for recycling or transport to a waste disposal site for disposal. Extinguishing media: Anti-solvent foam, dry powder, carbon dioxide, water spray.

    Quality Index
    Chromaticity, Hazen unit (platinum-cobalt color number) ≤
    10
    Acetic anhydride content, % ≥
    99.0
    Residue on Evaporation , % ≤
    0.005
    Iron content, % ≤
    0.0001
    Potassium permanganate substance index ≤
    60
    Uses
    Acetic anhydride is an important acetylating agent, acetic anhydride is used in the manufacture of cellulose acetate; acetic acid plastic; non-combustible film film; in the pharmaceutical industry for the manufacture of tetracycline; furazolidone; dibutazole; caffeine and Aspirin; sulfa drugs; mainly used in the dye industry to produce disperse dark blue HCL; disperse red S-SWEL; disperse yellow brown S-2REL; used in the perfume industry to produce coumarin; borneol acetate Musk scent; cedar acetate; rosin acetate; phenylethyl acetate; geranyl acetate; etc.; acetyl peroxide produced by acetic anhydride, is the initiator of polymerization and bleach.

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