Haz-Map: Occupational Exposure to Hazardous Agents

Exposure Assessment
Agent Name	Methyltetrahydrophthalic anhydride
CAS Number	26590-20-5
Formula	C9-H10-O3
Major Category	Plastics & Rubber
Synonyms	1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-; Methylcyclohexene-1,2-dicarboxylic anhydride (mixture of isomers); [ChemFinder]
Category	Acid Anhydrides
Sources/Uses	Exposures have been reported in workers applying polyester resin glues and curing epoxy and alkyl resins; [NIOSHTIC]
Comments	Occupational asthma reported in workers curing epoxy resins; [Malo] [Tarvainen K, et al. Immunologic contact urticaria due to airborne methylhexahydrophthalic and methyltetrahydrophthalic anhydrides. Contact Dermatitis. 1995 Apr;32(4):204-9.]
Reference Link	Allergy to methyltetrahydrophthalic anhydride in epoxy resin workers
Skin Designation (ACGIH)	Not evaluated
Reference Link	Exposure assessment and sensitisation in workers exposed to organic acid anhydrides
Adverse Effects
Asthma	Yes
Skin Sensitizer	Yes
Links to Other NLM Databases
Toxicity Information	Search TOXNET
Chemical Information	Search ChemIDplus
Biomedical References	Search PubMed
Related Information in Haz-Map
Diseases	Occupational diseases associated with exposure to this agent: Asthma, occupational Contact dermatitis, allergic
Processes	Industrial Processes with risk of exposure: Plastic Composites Manufacturing Working with Glues and Adhesives