480983

Propyne

≥97%

• Synonym(s): Allylene, Methylacetylene
• Linear Formula: CH₃C≡CH
• CAS Number: 74-99-7
• Molecular Weight: 40.06
• EC Number: 200-828-4
• MDL number: MFCD00036235
• UNSPSC Code: 12142100
• PubChem Substance ID: 24871730
• NACRES: NA.22

Properties

• vapor pressure: 204.6 mmHg ( −49.5 °C)
• Quality Level: 100
• Assay: ≥97%
• form: gas
• bp: −23.2 °C (lit.)
• mp: −102.7 °C (lit.)
• SMILES string: CC#C
• InChI: 1S/C3H4/c1-3-2/h1H,2H3
• InChI key: MWWATHDPGQKSAR-UHFFFAOYSA-N

Description

General description

Propyne (methylacetylene) is commonly used in gas welding.[1]

Application

Propyne (CH₃C≡CH) can be used:

• As a fuel for stoichiometric low-pressure flat-flames in isomer-specific combustion studies.[2]
• In the synthesis of polycyclic aromatic hydrocarbons under various reaction conditions.[3]
• In the synthesis of phenylacetylenes.[3]
• In the selective synthesis of propene by catalytic hydrogenation using Pt/Al₂O₃ catalyst.[4]

Packaging

Supplied in a Sure/Pac^™ cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.

Compatible with the following:

• Aldrich^® Sure/Pac^™ station for liquefied gases Z566446
• PTFE Sealing tape Z104388 or Z221880
• Brass hose adapter Z146811
• Aldrich^® mini gas regulator Z513539

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

Sure/Pac is a trademark of Sigma-Aldrich Co. LLC

Safety Information

• Pictograms: GHS02,GHS04,GHS07
• Signal Word: Danger
• Hazard Statements: H220,H280,H335
• Precautionary Statements: P210 - P261 - P271 - P304 + P340 + P312 - P403 + P233 - P410 + P403
• Hazard Classifications: Flam. Gas 1A - Press. Gas Compr. Gas - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 2A - Gases
• WGK: nwg
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves