Methane

Specification

Purity,% 99.9 99.99 99.995 99.999 99.9999
Oxygen ≤50 ppmv ≤10 ppmv ≤5 ppmv ≤1 ppmv ≤0.25 ppmv
Nitrogen ≤250 ppmv ≤35 ppmv ≤15 ppmv ≤4 ppmv ≤0.25 ppmv
Carbon dioxide

≤2 ppmv ≤0.02 ppmv
Carbon monoxide

≤1 ppmv ≤0.02 ppmv
Moisture ≤50 ppmv ≤10 ppmv ≤5 ppmv ≤1.0 ppmv ≤0.5 ppmv
Ethane ≤600 ppmv ≤25 ppmv ≤15 ppmv ≤3 ppmv ≤0.02 ppmv
Ethylene

≤1 ppmv ≤0.02 ppmv
Hydrogen ≤50 ppmv ≤10 ppmv ≤5 ppmv ≤1 ppmv ≤0.02 ppmv
Propane

≤1 ppmv ≤0.02 ppmv
Acrylic

≤1 ppmv ≤0.02 ppmv

transportation    

DOT shipping name Methane, compressed

DOT classification 2.1

DOT label combustible gas

UN NO. UN 1971

CAS No. 74-82-8

CGA/DISS /BS341/DIN477 350/W22-14L/NO.4/NO.1

Transport state Compressible gas

Technical Information    

Cylinder condition @ 21.1°C gas

Combustion limit in air 5–15.0%

Natural temperature (°C) 580

Molecular weight (g/mol) 16.043

Specific gravity (air =1) 0.555

Critical temperature (°C) -82.57

Application

It is used to prepare standard gas for calibration of natural gas, petrochemical and environmental monitoring.