Constituent
Name
CH4 gas 99.995%
Family
gas
Class
molecular gas
Compound type
gas
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0 $\pm$ 0.001
Chemical composition
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Mass fraction State Relevance Comments
$CH_4$ Methane molecule 0.999975 $\pm$ 2.5e-05 0.9999636744727767 $\pm$ 7.304806510743679e-05 pure main stated purity: > 99.995% - natural istopic composition, but possible fractionation
$C_2H_6$ Ethane molecule 7.5e-06 $\pm$ 7.5e-06 1.4057345248812003e-05 $\pm$ 1.405802070556835e-05 mixed impurity maximum impurity in CH4 gas bottle
$C_nH_m$ Hydrocarbons molecule 2.5e-06 $\pm$ 2.5e-06 mixed impurity maximum CnHm impurity in CH4 gas bottle
$H_2O$ Water molecule 2.5e-06 $\pm$ 2.5e-06 2.807399659702106e-06 $\pm$ 2.8075345555188016e-06 mixed impurity maximum impurity in CH4 gas bottle
$O_2$ Oxygen molecule 2.5e-06 $\pm$ 2.5e-06 4.9865107934826065e-06 $\pm$ 4.986750395793458e-06 mixed impurity maximum impurity in CH4 gas bottle
$CO_2$ Carbon dioxide molecule 5e-07 $\pm$ 5e-07 1.371639404594182e-06 $\pm$ 1.3717053119960924e-06 mixed impurity maximum impurity in CH4 gas bottle
$H_2$ Hydrogen molecule 5e-08 $\pm$ 5e-08 6.282865218924283e-09 $\pm$ 6.283167111186742e-09 mixed impurity maximum impurity in CH4 gas bottle
$N_2$ Nitrogen molecule 7.5e-06 $\pm$ 7.5e-06 1.3096349251429268e-05 $\pm$ 1.3096978532237897e-05 mixed impurity maximum impurity in CH4 gas bottle
Chemical functions
  Function Number Relevance
$R-CH_3$ 2 impurity
$R-CH_3$ impurity
$R-CH_2-R$ impurity
$R=CH_2$ impurity
$R_2>CH-R$ impurity
$R=CH-R$ impurity
$R\equiv CH$ impurity
$R_2>C=C<R_2$ impurity
$R-C\equiv C-R$ impurity
$R-OH$ 2 impurity
Chemical bonds
  Bond Number Relevance
$\geq C-H$ 4 main
$\geq C-H$ 6 impurity
$\geq C-C \leq$ 1 impurity
$\geq C-H$ impurity
$\eqslantgtr C-H$ impurity
$\equiv C-H$ impurity
$\geq C-C \leq$ impurity
$>C=C<$ impurity
$-C\equiv C-$ impurity
$-O-H$ 2 impurity
$O=O$ 1 impurity
$=C=O$ 2 impurity
$H-H$ 1 impurity
$N\equiv N$ 1 impurity
Phase type
gas
Texture
gas