400890

cis-2-Butene

≥99%

• Synonym(s): (2Z)-2-Butene, (Z)-2-Butene, Z-Butene, cis-1,2-Dimethylethylene, cis-2-Butylene
• Linear Formula: CH₃CH=CHCH₃
• CAS Number: 590-18-1
• Molecular Weight: 56.11
• Beilstein/REAXYS Number: 1361341
• EC Number: 209-673-7
• MDL number: MFCD00009294
• UNSPSC Code: 12142100
• PubChem Substance ID: 24864964
• NACRES: NA.22

Properties

• vapor density: 2 (vs air)
• vapor pressure: 1414 mmHg ( 21 °C)
• assay: ≥99%
• form: gas
• autoignition temp.: 615 °F
• expl. lim.: 9.7 %
• bp: 3.7 °C (lit.)
• mp: −139 °C (lit.)
• SMILES string: [H]\C(C)=C(/[H])C
• InChI: 1S/C4H8/c1-3-4-2/h3-4H,1-2H3/b4-3-
• InChI key: IAQRGUVFOMOMEM-ARJAWSKDSA-N

Description

application

cis-2-Butene is an unsaturated olefinic hydrocarbon used as a precursor in the polymerization of gasoline. It is also used to synthesize butadiene and other aliphatic C4/C5 organic molecules. It is also employed as a cross-linking agent.

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
• signalword: Danger
• hcodes: H220,H280
• pcodes: P210 - P410 + P403
• Hazard Classifications: Flam. Gas 1 - Press. Gas Liquefied gas
• Storage Class: 2A - Gases
• wgk_germany: WGK 3
• flash_point_f: 10.4 °F - closed cup
• flash_point_c: -12 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)