C9H8O3
164.16 g/mol
Pharmaceutical IntermediateDanger
Carbic anhydride
CAS129-64-6EC204-957-7
Category
Pharmaceutical Intermediate
Compound Class
Ester
Primary Use
Pharmaceutical Intermediate
Carbic anhydride is a cyclic anhydride with a bicyclic ring system, characterized by its low molecular weight and lack of aromatic rings. It is primarily significant as a pharmaceutical intermediate used in the manufacturing of olmesartan medoxomil.
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
SimilarStructure SimilarSimilarity 0.73
Bicyclo[2.2.2]oct-5-ene-2,3-dicarboxylic anhydride
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(S)-(+)-1-Methoxy-2-propanol
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ReferenceSame Category
2-Chloro-5-methyloxazole
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(2S)-6-FLUORO-3,4-DIHYDRO-2H-1-BENZOPYRAN-2-CARBOXYLIC ACID
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pharmaceutical intermediate
ReferenceSame Category
(R)-6-Fluoro-3,4-dihydro-2H-1-benzopyran-2-carboxylicacid
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pharmaceutical intermediate
Referencestereoisomer of
Himic anhydride
CAS2746-19-2
pharmaceutical intermediate
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 Carbic anhydride (CAS 129-64-6) 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
(1S,2R,6S,7R)-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
InChIKey
KNDQHSIWLOJIGP-UMRXKNAASA-N
SMILES
C1[C@@H]2C=C[C@H]1[C@@H]3[C@H]2C(=O)OC3=O
Synonyms (34)
- Carbic anhydride
- Endic anhydride
- Kayahard CD
- NADIC ACID ANHYDRIDE
- Nadic anhydride
- endo-Himic acid anhydride
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