Trimellitic Anhydride
Title: Trimellitic Anhydride
CAS Registry Number: 552-30-7
CAS Name: 1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid
Additional Names: trimellitic acid 1,2-anhydride; anhydrotrimellitic acid; 1,3-dioxo-5-phthalancarboxylic acid
Molecular Formula: C9H4O5
Molecular Weight: 192.13
Percent Composition: C 56.26%, H 2.10%, O 41.64%
Literature References: Prepd by subliming trimellitic acid above its mp: Alder, Dortmann, Ber. 85, 556 (1952); by heating crude trimellitic acid with V2O5: McKinnis, US 2998431 (1959 to Union Oil of Calif.).
Properties: Crystals, mp 161-163.5°. bp14 240-245°. Solubilities at 25° in g/100 g solvent: carbon tetrachloride 0.002; ligroin 0.06; mixed xylenes 0.4; dimethylformamide 15.5; acetone 49.6; ethyl acetate 21.6.
Melting point: mp 161-163.5°
Boiling point: bp14 240-245°
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, nose, respiratory system; pulmonary edema, respiratory sensitization; rhinitis, asthma, cough, wheezing, dyspnea, malaise, fever, muscle aches, sneezing. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 318.
Use: In the preparation of resins, adhesives, polymers, dyes, printing inks.

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