helium

• ChemBase ID: 136909
• Molecular Formular: He
• Molecular Mass: 4.002602
• Monoisotopic Mass: 4.00260325
• SMILES: [He]
• Canonical SMILES: [He]
• InChI: InChI=1S/He
• InChIKey: SWQJXJOGLNCZEY-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: helium
• IUPAC Traditional name: helium
• Synonyms: Helium

Database IDs

• CAS Number: 7440-59-7
• EC Number: 231-168-5
• MDL Number: MFCD00011031
• PubChem SID: 162231176; 24857776
• PubChem CID: 23987

CALCULATED PROPERTIES

• H Acceptors: 0
• H Donor: 0
• Log P: 0.0
• Molar Refractivity: 0.0 cm^3
• Polarizability: 2.046669 Å^3
• Polar Surface Area: 0.0 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Melting Point: -272.2 °C(lit.)
• Boiling Point: -268.9 °C(lit.); -268.934 °C(lit.)
• Vapor Density: 0.14 (vs air)

Safety Information

• RTECS: MH6520000
• UN Number: 1046
• German water hazard class: 3
• Hazard Class: 2.2
• GHS Pictograms: GHS04
• GHS Signal Word: Warning
• GHS Hazard statements: H280
• GHS Precautionary statements: P410 + P403
• Personal Protective Equipment: Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US); Eyeshields, Gloves, half-mask respirator (US), multi-purpose combination respirator cartridge (US)
• RID/ADR: UN 1046 2.2

Product Information

• Purity: ≥99.995%; ≥99.999%
• Impurities: ≤5 ppm oxygen; ≤5 ppm water
• Empirical Formula (Hill Notation): He

DETAILS

Sigma Aldrich - 295345

Packaging
56 L in steel cylinder
Recommended products
Brass control valve Z146943 or either of brass regulators Z146706 and Z146714 is recommended.

Sigma Aldrich - 00488

Other Notes
Sales restrictions may apply
Packaging
pressure tinfilling pressure at 15°C: 11 bar; content (15°C, 1 bar): 11 L;Recommended valves see section ′Tools/Valves and Adapter for Cylinders′ in the annex of the Fluka-Riedel-Catalog or under www.sigmaaldrich.com/fluka/bulletin/fl_analytix_v5_n7.pd