C9H8O3
164.16 g/mol
Pharmaceutical IntermediateDanger
5-Norbornene-2,3-dicarboxylic anhydride
CAS826-62-0EC212-557-9
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
5-Norbornene-2,3-dicarboxylic anhydride, also known as nadic anhydride, is an organic acid anhydride derivative of norbornene. It is used as a pharmaceutical intermediate in the production of fine chemicals.
Pharmaceutical intermediate for fine chemicals
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
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Safety Reference
Danger
H317May cause an allergic skin reaction
H318Causes serious eye damage
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
Customs Tariff Classification
The international HS code for 5-Norbornene-2,3-dicarboxylic anhydride (CAS 826-62-0) 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
4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
InChIKey
KNDQHSIWLOJIGP-UHFFFAOYSA-N
SMILES
C1C2C=CC1C3C2C(=O)OC3=O
Synonyms (35)
- 3, 1,2,3,6-tetrahydro-
- 5-Norbornene-2, cis-exo-
- Nadic Anhydride (NA)
- Nadic anhydrous
- endo,3-dicarboxylic anhydride
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