• ChemBase ID: 138970
• Molecular Mass: 0
• Monoisotopic Mass: 0
• SMILES: Hydrogen
• Canonical SMILES: Hydrogen
• InChI: InChI=

NAMES AND DATABASE IDS

Names

• Synonyms: Hydrogen

Database IDs

• CAS Number: 1333-74-0
• EC Number: 215-605-7
• MDL Number: MFCD00070838
• PubChem SID: 24857780; 162233221; 24845040
• PubChem CID: 783

CALCULATED PROPERTIES

• H Acceptors: 0
• H Donor: 0
• LogD (pH = 5.5): 0.0
• LogD (pH = 7.4): 0.0
• Molar Refractivity: 0.0 cm^3
• Polarizability: 0.788768 Å^3
• Polar Surface Area: 0.0 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: false

PROPERTIES

Physical Property

• Melting Point: -259.2 °C(lit.)
• Boiling Point: -252.8 °C(lit.)
• Flash Point: <-150 °C; <-238 °F
• Auto Ignition Point: 1060 °F
• Vapor Density: 0.07 (21 °C, vs air)

Safety Information

• RTECS: MW8900000
• European Hazard Symbols: Highly flammable (F+)
• UN Number: 1049; 1950
• German water hazard class: nwg
• Hazard Class: 2.1
• Risk Statements: 12
• Safety Statements: 9-16-33
• GHS Pictograms: GHS02; GHS04
• GHS Signal Word: Danger
• Explode Limits: 74.2 %
• GHS Hazard statements: H220
• GHS Precautionary statements: P210
• Personal Protective Equipment: Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US); Eyeshields, Faceshields, Gloves, half-mask respirator (US), multi-purpose combination respirator cartridge (US)
• RID/ADR: UN 1049 2.1; UN 1950 2.1

Product Information

• Purity: ≥99.99%; ≥99.999%
• Impurities: ≤10 ppm oxygen; ≤5 ppm water
• Empirical Formula (Hill Notation): H2

DETAILS

Sigma Aldrich - 295396

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

Sigma Aldrich - 00473

Other Notes
Sales restrictions may apply
Packaging
pressure tin; filling pressure at 15°C: 11 bar; content (15°C, 1 bar): 11 L