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463035

Sigma-Aldrich

Methane

electronic grade, ≥99.998%

Synonym(s):
Marsh gas, Methyl hydride
Empirical Formula (Hill Notation):
CH4
CAS Number:
Molecular Weight:
16.04
Beilstein:
1718732
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

grade

electronic grade

Quality Level

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]

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Packaging

24 L in stainless steel cylinder

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.

Pictograms

FlameGas cylinder

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

Flam. Gas 1A - Press. Gas Compr. Gas

Storage Class Code

2A - Gases

WGK

nwg

Flash Point(F)

-306.4 °F - closed cup

Flash Point(C)

-188 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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