Product character of Pyromellitic Dianhydride (PMDA) CAS 89-32-7
This product is white or yellowish crystal, melting point 284-288 ℃, boiling point 397-400 ℃, flash point 380 ℃, specific gravity 1.680, soluble in dimethyl sulfoxide, dimethyl formamide, acetone, methyl ethyl ketone, methyl isobutyl ketone and ethyl acetate, insoluble in chloroform, ether and benzene. When exposed to humid air, it will quickly absorb water in the air and hydrolyze to pyromellitic acid. It is highly toxic and can stimulate skin and mucosa.
Security message of Pyromellitic Dianhydride (PMDA) CAS 89-32-7
1. Swallowing may be harmful and may cause serious eye damage. Inhalation may cause allergy or asthma symptoms or dyspnea.
2. Half lethal dose (LD50) orally - rat - 2250 g / kg.
3. Flammability: it is combustible in case of open fire and releases toxic gas in high heat.
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