I-Methane (I-CH4) iyigesi engenaphunga nengenambala evuthayo futhi isebenza njengomthombo ophakeme kaphethiloli. Iyazimela cishe ku-538°C, ukuvutha ngokuzenzekelayo lapho ufinyelela amazinga okushisa athile.
Ibonakala ngelangabi eliluhlaza okwesibhakabhaka, I-methane ingafinyelela amazinga okushisa aphezulu cishe ku-1400°C. Lapho ehlangana nomoya, kuba eziqhumayo phakathi 4.5% futhi 16% ukugxila. Ngaphansi kwalo mngcele, ivutha ngenkuthalo, ngenkathi ngaphezulu, isekela ukuthotshiswa kakhudlwana ukuvutha.