294985

Allene

≥95%

• Synonym(s): Propadiene
• Linear Formula: H₂C=C=CH₂
• CAS Number: 463-49-0
• Molecular Weight: 40.06
• UNSPSC Code: 12142100
• NACRES: NA.22
• PubChem Substance ID: 24857749
• EC Number: 207-335-3
• Beilstein/REAXYS Number: 1730774
• MDL number: MFCD00008566
• Assay: ≥95%

Properties

• vapor density: 1.42 (20 °C, vs air)
• Quality Segment: 100
• vapor pressure: 6795 mmHg ( 21 °C)
• assay: ≥95%
• expl. lim.: 13 %
• bp: −34 °C (lit.)
• mp: −136 °C (lit.)
• SMILES string: C=C=C
• InChI: 1S/C3H4/c1-3-2/h1-2H2
• InChI key: IYABWNGZIDDRAK-UHFFFAOYSA-N

Description

Application

• Allene is extensively used in a variety of photochemical, thermal, and transition metal-mediated cycloadditions.
• It can be lithiated to obtain allenyllithium which reacts with alkyl halides to afford terminal allenes.
• Additional application includes the preparation of reagents such as isopropenylsilanes and isopropenylstannanes by reacting with stannyl and silyl cuprates respectively.

Packaging

Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.

Compatible with the following:

• Aldrich^® lecture-bottle station systems
• Aldrich^® lecture-bottle gas regulators

Other Notes

See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation

Legal Information

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

Safety Information

• pictograms: GHS02,GHS04
• signalword: Danger
• hcodes: H220,H280
• pcodes: P210 - P377 - P381 - P410 + P403
• Hazard Classifications: Flam. Gas 1 - Press. Gas Liquefied gas
• Storage Class: 2A - Gases
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)