| Agent Name |
ACID ANHYDRIDES |
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| Alternative Name |
CLASS |
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| Major Category |
Plastics & Rubber |
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| Category |
Acid Anhydrides |
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| Sources/Uses |
The acid anhydrides are used primarily as curing agents for alkyl and epoxy resins. [Rom, p. 1213] They are also one of the basic building blocks of polyesters. [Sullivan, p. 473] |
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| Comments |
An acid anhydride is a chemical compound that can form the acid when united with a molecule of water, e.g., from phthalic anhydride to phthalic acid. [Hawley] Acid anhydrides cause immunologic, occupational contact urticaria. [Kanerva 2004, p. 104] Phthalic anhydride and trimellitic anhydride are in the NIOSH Pocket Guide. Six other acid anhydrides are listed in "Agents Causing Occupational Asthma with Key References" by Chan-Yeung & Malo [Malo] These six are tetrachlorophthalic anhydride, pyromellitic dianhydride, methyl tetrahydrophthalic anhydride, himic anhydride, chlorendic anhydride, and maleic anhydride. |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
Not evaluated |
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| Adverse Effects |
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| Asthma |
Yes |
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| Links to Other NLM Databases |
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