C3H4
40.06 g/mol
Industrial ChemicalDanger
Propyne
CAS74-99-7EC200-828-4
Category
Industrial Chemical
Compound Class
Other
Primary Use
Welding fuel and chemical intermediate
Propyne, also known as methylacetylene, is an alkyne compound used primarily as a fuel in gas welding and as a chemical intermediate. Unlike acetylene, it can be safely condensed, making it a practical component of MAPD gas for industrial applications.
Welding fuelChemical 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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stabilizer and lubricant additive
Safety Reference
Danger
H220Extremely flammable gas
H280Contains gas under pressure; may explode if heated
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
Customs Tariff Classification
The international HS code for Propyne (CAS 74-99-7) 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
prop-1-yne
InChIKey
MWWATHDPGQKSAR-UHFFFAOYSA-N
SMILES
CC#C
Synonyms (11)
- 1-PROPYNE
- Acetylene, methyl-
- Allylene
- CH3C.$.CH
- Methylacetylene
- Propyne
- Propynylidyne
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