463035

Methane

electronic grade, ≥99.998%

• Synonym(s): Marsh gas, Methyl hydride
• Empirical Formula (Hill Notation): CH₄
• CAS Number: 74-82-8
• Molecular Weight: 16.04
• Beilstein/REAXYS Number: 1718732
• EC Number: 200-812-7
• MDL number: MFCD00008279
• UNSPSC Code: 41116107
• PubChem Substance ID: 24869888
• NACRES: NA.23

Properties

• grade: electronic grade
• Quality Level: 100
• vapor density: 0.55 (vs air)
• assay: ≥99.998%
• form: gas
• autoignition temp.: 998 °F
• expl. lim.: 15 %
• impurities: <2 ppm CO; <2 ppm CO₂; <3 ppm Water (H₂O); <5 ppm Ethane (C₂H₅); <5 ppm Nitrogen (N₂)
• bp: −161 °C (lit.)
• mp: −183 °C (lit.)
• transition temp: critical temperature −82.1 °C
• density: 0.716 g/mL at 25 °C (lit.)
• SMILES string: [H]C([H])([H])[H]
• InChI: 1S/CH4/h1H4
• InChI key: VNWKTOKETHGBQD-UHFFFAOYSA-N

Description

Features and Benefits

Methane is used as a carbon source for the chemical vapor deposition (CVD) of carbide and diamond thin films.

Recommended products

High-purity regulators Z527378 or Z527386 are recommended.

Safety Information

• pictograms: GHS02,GHS04
• signalword: Danger
• hcodes: H220,H280
• pcodes: P210 - P377 - P381 - P410 + P403
• Hazard Classifications: Flam. Gas 1A - Press. Gas Compr. Gas
• Storage Class: 2A - Gases
• wgk_germany: nwg
• flash_point_f: -306.4 °F - closed cup
• flash_point_c: -188 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)