Metaphthalic anhydride CAS 552-30-7 , scientific name 1,2,4-phenylenetricarboxylic anhydride, also known as metaphthalic anhydride. The molecular formula is C9H4O5. The appearance is white flake. Melting point 168 ℃, boiling point 390 ℃, soluble in hot water and acetone, 2-J ketone, dimethylformamide, ethyl acetate, and cyclohexanone. Dissolve in anhydrous ethanol and undergo reaction, slightly soluble in carbon tetrachloride and toluene.

Chinese name: trimellitic anhydride

Chinese synonym: trimellitic anhydride; Trimellitic anhydride; Maleic anhydride; 1,2,4-phenylenetricarboxylic anhydride; Trimellitic anhydride; Trimellitic anhydride; Maleic anhydride; Benzene trimeric anhydride; Phthalic anhydride-4-carboxylic acid; Metaphthalic anhydride 500G; Benzene-1,2,4-tricarboxylic anhydride

English name: Trimellitic Anhydride

Synonyms in English: 1,2,4-Benzenetricarboxylicacidanhyride; 1,2,4-Benzenetricarboxylicacidanhyride-1,2; 1,2,4-Benzenetricarboxylicacid, cyclic1,2-anhydride; 1,2,4-benzenetricalChemicalbookarboxylic acid, cyclic1,2-anhydride; 1,2,4-benzeneetricarboxylicacidanhyride

CAS number: 552-30-7

Molecular formula: C9H4O5

Molecular weight: 192.13

EINECS number: 209 008 0

Physical and chemical properties

White powder or thin sheet. Melting point 168 ℃. Soluble in water and general organic solvents such as ethanol and acetone. Pseudocumene (mainly composed of 1,2,4-trimethylbenzene) from aromatic hydrocarbons such as coal tar fractions, cracked gasoline, and catalytic reforming gasoline can be first prepared by the Chemicalbook liquid-phase nitric acid oxidation method and the air oxidation method using cobalt or manganese catalysts, and then dehydrated to obtain benzoic acid. Metaphthalic anhydride is a plasticizer with excellent heat resistance for plastics, and can also be used as a curing agent for epoxy resins, heat-resistant insulation laminates, heat-resistant varnishes, stabilizers, etc.

Purpose

Metaphthalic anhydride is used in the production of unsaturated polyester resin, polyimide resin, high-temperature insulation material, PVC heat-resistant plasticizer, epoxy resin curing agent, dye, capacitor impregnation oil, and adhesive.

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