C4H4O2
84.07 g/mol
Pharmaceutical IntermediateDanger
2-Butynoic acid
CAS590-93-2EC209-695-7
Category
Pharmaceutical Intermediate
Compound Class
Organic Acid
Primary Use
Pharmaceutical Intermediate
2-Butynoic acid, also known as tetrolic acid, is a short-chain unsaturated carboxylic acid. It is used as a pharmaceutical intermediate in chemical manufacturing.
Pharmaceutical intermediate
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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pharmaceutical intermediate
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pharmaceutical intermediate
ReferenceSame Category
3,5-dimethylpyridine
CAS591-22-0
pharmaceutical intermediate
Safety Reference
Danger
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
Customs Tariff Classification
The international HS code for 2-Butynoic acid (CAS 590-93-2) is 2916.19.
HS code (international, 6-digit)
2916.19
EU CN code (8-digit)
2916 19 95
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
but-2-ynoic acid
InChIKey
LUEHNHVFDCZTGL-UHFFFAOYSA-N
SMILES
CC#CC(=O)O
Synonyms (22)
- 0D-118
- 0D-154
- 0D-190
- 0D-226
- 0D-262
- 1D-190
- 1D-226
- 1D-262
- 1D-298
- 1-Propynecarboxylic acid
- 2-Butynoic acid
- 2-butylnoic acid
- 2-butynic acid
- 3-Methylpropiolic acid
- Tetrolic acid
- TetrolsA currencyure
- Tetrolsaure
- but-2-ynoic acid
- butynoic acid
- propinecarboxylic acid
- propynecarboxylic acid
- small carboxylic acid 15
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