C3H4
40.06 g/mol
Industrial ChemicalDanger
Allene
CAS463-49-0EC207-335-3
Category
Industrial Chemical
Compound Class
Other
Primary Use
Fuel gas for welding
Allene is the simplest cumulated diene, consisting of a carbon atom double-bonded to two adjacent carbon atoms. It is used industrially as a fuel gas for welding.
Fuel gas for welding
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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Safety Reference
Danger
H220Extremely flammable gas
H280Contains gas under pressure; may explode if heated
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Allene (CAS 463-49-0) is 2901.29.
HS code (international, 6-digit)
2901.29
EU CN code (8-digit)
2901 29 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
propa-1,2-diene
InChIKey
IYABWNGZIDDRAK-UHFFFAOYSA-N
SMILES
C=C=C
Synonyms (11)
- 1,2-Propadiene
- 1,2-Propadiene-1,3-diylidene
- Allene
- Dimethylenemethane
- Propa-1,2-diene
- Propadiene, inhibited
- Sym-allylene
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