C8H10O3
154.16 g/mol
Industrial ChemicalDanger
Hexahydrophthalic anhydride
CAS85-42-7EC201-604-9
Category
Industrial Chemical
Compound Class
Heterocycle
Primary Use
curing agent for epoxy resins
Hexahydrophthalic anhydride is an organic compound used primarily as a curing agent for epoxy resins. It is a colorless solid with a characteristic odor and is valued in industrial applications for its role in crosslinking epoxy systems.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongStructure SimilarSimilarity 0.88
Tetrahydro-1H-cyclopenta[c]furan-1,3(3aH)-dione
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curing agent for epoxy resins
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curing agent for epoxy resins
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curing agent for epoxy resins
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4,4'-carbonyldiphthalic anhydride
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curing agent for epoxy resins
ReferenceSame Category
3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione
CAS85-43-8
Intermediate for alkyds, polyesters, plasticizers
ReferenceSame Category
Phthalic anhydride
CAS85-44-9
Manufacture of artificial resins
ReferenceSame Category
4,4'-butylidenebis(2-(1,1-dimethylethyl)-5-methyl-phenol)
CAS85-60-9
Antioxidant for rubber and latex
Safety Reference
Danger
H317May cause an allergic skin reaction
H318Causes serious eye damage
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
Regulatory Compliance1
- EU REACH SVHCEURegulation
Customs Tariff Classification
The international HS code for Hexahydrophthalic anhydride (CAS 85-42-7) is 2917.20.
HS code (international, 6-digit)
2917.20
EU CN code (8-digit)
2917 20 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione
InChIKey
MUTGBJKUEZFXGO-UHFFFAOYSA-N
SMILES
C1CCC2C(C1)C(=O)OC2=O
Synonyms (29)
- HHPA
- Araldite HT 907
- Hexahydrophthalic anhydride
- Lekutherm Hardener H
- Lurasidone Impurity 96
- hexahydrophtalic anhydride
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