顺-2-丁烯

Description

cis-2-butene · CAS 590-18-1 · C4H8. UNII L35ORC9C05. Boiling Point: 3.73 °C at 760 mm Hg /cis-2-Butene/; Boiling Point: 3.72 °C; Boiling Point: 3.7 °C.

Identification

CAS Registry Number	590-18-1
PubChem CID	5287573
Molecular formula	C4H8
IUPAC name	(Z)-but-2-ene
UNII (FDA)	L35ORC9C05

Computed Descriptors

Molecular Weight	56.11
XLogP3	2.3
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	0
Exact Mass	56.062600255
Monoisotopic Mass	56.062600255
Topological Polar Surface Area	0
Heavy Atom Count	4
Formal Charge	0

Physical & Chemical Properties

Boiling Point	3.73 °C at 760 mm Hg /cis-2-Butene/
Boiling Point	3.72 °C
Boiling Point	3.7 °C
Boiling Point	3.7 °C @760 [mm Hg]
Melting Point	-139.3 °C /cis-2-Butene/
Melting Point	-138.89 °C
Melting Point	-138.7 °C
Melting Point	-138.9 °C
Flash Point	-11.99 °C (10.42 °F) - closed cup
Solubility	In water, 658 mg/L at 25 °C

Physical description & handling notes

• 2-butene appears as a colorless liquefied petroleum gas. Asphyxiate gas. Flammability limits in air 1.8-9.7% by volume.
• Gas Vapor; Liquid
• COLOURLESS COMPRESSED LIQUEFIED GAS.
• Colorless gas
• Flammable gas
• Slightly aromatic odor

GHS Hazard Classification

Reported hazard statements	H220, H280 (80.7%), H336 (11.7%)

Documented Uses

• INT FOR BUTADIENE, HEPTENES, SEC-BUTYL ALC, BUTYLENE OXIDE; PRODN OF HIGH-DENSITY POLYETHYLENE & POLYMER GASOLINES
• Solvent, cross-linking agent, polymerization of gasoline, butadiene synthesis; synthesis of C4 and C5 derivatives.
• CHEM INT FOR GASOLINE ALKYLATE & POLYGAS (BUTYLENES MIXT)
• REFINERY FUEL (MIXT OF BUTYLENES)
• For more Uses (Complete) data for cis-2-Butene (6 total), please visit the HSDB record page.
• Not Known or Reasonably Ascertainable

Synonyms

cis-2-Butene; (Z)-But-2-ene; cis-Butene; 590-18-1; cis-But-2-ene; beta-cis-Butylene; (2Z)-but-2-ene; cis-1,2-Dimethylethylene; High-boiling butene-2; 2-BUTENE, (Z)-; z-but-2-ene; L35ORC9C05; DTXSID0027224; CHEBI:48366; RefChem:577312; DTXCID307224

Frequently Asked Questions

What are the CAS number and molecular formula of cis-2-butene?

CAS 590-18-1; molecular formula C4H8; molecular weight — g/mol.

What other names is cis-2-butene known by?

cis-2-Butene, (Z)-But-2-ene, cis-Butene, 590-18-1, cis-But-2-ene, beta-cis-Butylene.

Is cis-2-butene classified as hazardous?

Hazard statements reported: H220, H280, H336.

What are the key physical properties of cis-2-butene?

Boiling Point: 3.73 °C at 760 mm Hg /cis-2-Butene/; Boiling Point: 3.72 °C; Boiling Point: 3.7 °C; Boiling Point: 3.7 °C @760 [mm Hg].

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.