Tetrahydromethylphthalic anhydride
Agent Name
Tetrahydromethylphthalic anhydride
CAS Number
11070-44-3
Formula
C9-H10-O3
Major Category
Plastics & Rubber
Synonyms
1,3-Isobenzofurandione, tetrahydromethyl-; [ChemIDplus] Tetrahydromethyl-1,3-isobenzofuranedione; Methyltetrahydrophthalic anhydride; [eChemPortal: SIDSUNEP]
Category
Acid Anhydrides, Cyclic
Sources/Uses
Used mainly as a hardener for epoxy resins; [eChemPortal: SIDSUNEP]
Comments
Sensitizing substance; [MAK] "Several occupational sensitization cases by inhalation at processing sites were reported. Respiratory sensitization by this substance mediated by IgE have been reported (Nielsen, J. et al.1992, Yokota, K. et al. 1998, Yokota, K. et al. 1999)." [eChemPortal: SIDSUNEP] May cause skin and respiratory sensitization after prolonged contact; May cause serious damage to eyes; [eChemPortal: ESIS] Danger of sensitization of airways; [MAK] See "ACID ANHYDRIDES."
Biomedical References
Exposure Assessment
TLV (ACGIH)
7E-05 ppm, (TLV-SL = 0.7 mg/100 cm2)
STEL (ACGIH)
0.0003 ppm
Vapor Pressure
0.003 mm Hg
Explanatory Notes
"The Japan society for occupational health recommended 50 ug/m3 as a limit for this substance exposure during an 8 hr work shift." [eChemPortal: SIDSUNEP]
Adverse Effects
Asthma
Yes
Diseases, Processes, and Activities Linked to This Agent
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: