B

1-Butene

IUPAC: but-1-ene

C4H8 Organic Compounds CAS 106-98-9
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Quick Reference
Formula / NotationC4H8
CAS Number106-98-9
Molecular Weight56.11
Melting Point-301.5 °F (NTP, 1992)
Boiling Point21 °F at 760 mmHg (NTP, 1992)
Density0.6255 at 19.9 °F (NTP, 1992) - Less dense than water; will float
SolubilityInsoluble (NTP, 1992)
Appearance1-butene is a colorless gas. (NTP, 1992)
Also Known Asbut-1-ene; But-1-ene; Ethylethylene; 106-98-9; 1-Butylene; alpha-Butylene; Butene-1; alpha-Butene; LY001N554L; DTXSID1026746
CategoryOrganic Compounds

What is 1-Butene?

1-Butene (C4H8) is an organic compound that appears as 1-butene is a colorless gas. (NTP, 1992). It has a molecular weight of 56.11 g/mol. Its IUPAC name is but-1-ene. Boiling point: 21 °F at 760 mmHg (NTP, 1992). Melting point: -301.5 °F (NTP, 1992).

Formula & Notation

C4H8

IUPAC Name: but-1-ene

Other Names / Synonyms: but-1-ene; But-1-ene; Ethylethylene; 106-98-9; 1-Butylene; alpha-Butylene; Butene-1; alpha-Butene; LY001N554L; DTXSID1026746

Properties & Characteristics

Appearance: 1-butene is a colorless gas. (NTP, 1992). Molecular formula: C4H8. Molecular weight: 56.11 g/mol. Boiling point: 21 °F at 760 mmHg (NTP, 1992). Melting point: -301.5 °F (NTP, 1992). Density: 0.6255 at 19.9 °F (NTP, 1992) - Less dense than water; will float. Solubility: Insoluble (NTP, 1992). Vapor pressure: 3480 mmHg at 70 °F (NTP, 1992). LogP: 2.4.

Physical Data

PropertyValue
Melting Point-301.5 °F (NTP, 1992)
Boiling Point21 °F at 760 mmHg (NTP, 1992)
Density0.6255 at 19.9 °F (NTP, 1992) - Less dense than water; will float
Molecular Weight56.11
SolubilityInsoluble (NTP, 1992)
Appearance1-butene is a colorless gas. (NTP, 1992)

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term 1-Butene
Formula C4H8
CAS Number 106-98-9
Molecular Weight 56.11
Category Organic Compounds
Index All "B" terms
Synonyms but-1-ene; But-1-ene; Ethylethylene; 106-98-9; 1-Butylene; alpha-Butylene; Butene-1; alpha-Butene; LY001N554L; DTXSID1026746

Frequently Asked Questions

1-Butene (C4H8) is an organic compound that appears as 1-butene is a colorless gas. (NTP, 1992). It has a molecular weight of 56.11 g/mol. Its IUPAC name is but-1-ene. Boiling point: 21 °F at 760 mmHg (NTP, 1992). Melting point: -301.5 °F (NTP, 1992).

More "B" Terms

1-Butanol C4H10O 1,3-Butadiene C4H6 1,4-Butanediol C4H10O2 2-Butanol C4H10O 2-Butanone oxime C4H9NO 2-Butoxyethanol C6H14O2 9-Borabicyclo[3.3.1]nonane C8H15B Background Radiation Band E_g (band gap energy in eV) Band of Stability N/Z ratio: ~1 (light nuclei) to ~1.5 (heavy nuclei) Band Theory of Metals E_band from MO theory; conductor: overlapping bands Barium Ba
View all "B" terms →
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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.

AllChemicals.info — The Online Chemical Glossary | https://allchemicals.info/chemical/1-butene

For educational purposes only. Verify all information before use.