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.. common
H2
H
CO
OH
HCO+
C
H3+
C+
H2O
e-

.. in RATE12
C
C+
C-
C10
C10+
C10-
C10H
C10H+
C10H-
C10H2
C10H2+
C10H3+
C11
C11+
C2
C2+
C2-
C2H
C2H+
C2H-
C2H2
C2H2+
C2H3
C2H3+
C2H4
C2H4+
C2H5
C2H5+
C2H5CN
C2H5CNH+
C2H5OH
C2H5OH+
C2H5OH2+
C2H7+
C2N
C2N+
C2N2+
C2NH+
C2O
C2O+
C2S
C2S+
C3
C3+
C3-
C3H
C3H+
C3H-
C3H2
C3H2+
C3H2O+
C3H3+
C3H4+
C3H5+
C3H6+
C3H7+
C3N
C3N+
C3N-
C3O
C3O+
C3P
C3S
C3S+
C4
C4+
C4-
C4H
C4H+
C4H-
C4H2+
C4H3
C4H3+
C4H4+
C4H5+
C4H7+
C4N
C4N+
C4P
C4P+
C4S
C4S+
C5
C5+
C5-
C5H
C5H+
C5H-
C5H2
C5H2+
C5H3+
C5H5+
C5N
C5N+
C5N-
C6
C6+
C6-
C6H
C6H+
C6H-
C6H2
C6H2+
C6H3+
C6H4+
C6H5+
C6H6
C6H6+
C6H7+
C7
C7+
C7-
C7H
C7H+
C7H-
C7H2
C7H2+
C7H3+
C7H4+
C7H5+
C7N
C7N+
C8
C8+
C8-
C8H
C8H+
C8H-
C8H2
C8H2+
C8H3+
C8H4+
C8H5+
C9
C9+
C9-
C9H
C9H+
C9H-
C9H2
C9H2+
C9H3+
C9H4+
C9H5+
C9N
C9N+
CCP
CCP+
CCl
CCl+
CF+
CH
CH+
CH-
CH2
CH2+
CH2CCH
CH2CCH+
CH2CCH2
CH2CHCCH
CH2CHCHCH2
CH2CHCN
CH2CHCN+
CH2CHCNH+
CH2CN
CH2CN+
CH2CO
CH2CO+
CH2NH
CH2NH2+
CH2PH
CH3
CH3+
CH3C3N
CH3C3N+
CH3C3NH+
CH3C4H
CH3C4H+
CH3C5N
CH3C5NH+
CH3C6H
CH3C7N
CH3C7NH+
CH3CCH
CH3CH3
CH3CH3+
CH3CHCH2
CH3CHO
CH3CHO+
CH3CHOH+
CH3CN
CH3CN+
CH3CNH+
CH3CO+
CH3COCH3
CH3COCH3+
CH3COCH4+
CH3CS+
CH3OCH3
CH3OCH3+
CH3OCH4+
CH3OH
CH3OH+
CH3OH2+
CH4
CH4+
CH4N+
CH5+
CN
CN+
CN-
CNC+
CNO
CO
CO+
CO2
CO2+
COOCH4+
CP
CP+
CRP
CRPHOT
CS
CS+
Cl
Cl+
ClO
ClO+
F
F+
Fe
Fe+
H
H+
H-
H2
H2+
H2C4N+
H2C7N+
H2C9N+
H2CCC
H2CCl+
H2CN
H2CNO+
H2CO
H2CO+
H2CS
H2CS+
H2Cl+
H2F+
H2NC+
H2NCO+
H2NO+
H2O
H2O+
H2O2
H2OCN+
H2PO+
H2S
H2S+
H2S2
H2S2+
H2SiO
H2SiO+
H3+
H3C3O+
H3C5N+
H3C7N+
H3C9N+
H3CO+
H3CS+
H3O+
H3S+
H3S2+
H3SiO+
H5C2O2+
HC2O+
HC2P
HC2P+
HC2S+
HC3N
HC3N+
HC3NH+
HC3O+
HC3S+
HC4H
HC4N+
HC4S+
HC5N
HC5N+
HC5NH+
HC7N
HC7N+
HC9N
HC9N+
HCN
HCN+
HCNH+
HCNO
HCNO+
HCNOH+
HCO
HCO+
HCO2+
HCOOCH3
HCOOH
HCOOH+
HCOOH2+
HCP
HCP+
HCS
HCS+
HCSi
HCSi+
HCl
HCl+
HF
HF+
HN2O+
HNC
HNC3
HNCO
HNCO+
HNCOH+
HNO
HNO+
HNS+
HNSi
HNSi+
HOC+
HOCN
HOCN+
HOCS+
HONC
HONC+
HPN+
HPO
HPO+
HS
HS+
HS2
HS2+
HSO+
HSO2+
HSiO2+
HSiS+
He
He+
HeH+
Mg
Mg+
N
N+
N2
N2+
N2H+
N2O
N2O+
NCCN
NCCNCH3+
NCCNH+
NH
NH+
NH2
NH2+
NH2CN
NH2CNH+
NH3
NH3+
NH4+
NO
NO+
NO2
NO2+
NS
NS+
Na
Na+
O
O+
O-
O2
O2+
O2-
O2H
O2H+
OCN
OCN+
OCS
OCS+
OH
OH+
OH-
P
P+
PC2H2+
PC2H3+
PC2H4+
PC3H+
PC4H+
PCH2+
PCH3+
PCH4+
PH
PH+
PH2
PH2+
PH3+
PHOTON
PN
PN+
PNH2+
PNH3+
PO
PO+
S
S+
S-
S2
S2+
SO
SO+
SO2
SO2+
Si
Si+
SiC
SiC+
SiC2
SiC2+
SiC2H
SiC2H+
SiC2H2
SiC2H2+
SiC2H3+
SiC3
SiC3+
SiC3H
SiC3H+
SiC3H2+
SiC4
SiC4+
SiC4H+
SiCH2
SiCH2+
SiCH3
SiCH3+
SiCH4+
SiF+
SiH
SiH+
SiH2
SiH2+
SiH3
SiH3+
SiH4
SiH4+
SiH5+
SiN
SiN+
SiNC
SiNC+
SiNCH+
SiNH2+
SiO
SiO+
SiO2
SiOH+
SiS
SiS+
e-

CH4

Methane
Flags: Detected, RATE12
Empirical: CH4
Mass: 16 amu
Heat of formation: -66.8 kJ mol-1
Added to system: 2003-04-28 18:00:51

Reactions: Formation | Destruction

84 CH4 formation reactions

ReactionαβγTl - Tu (K)
1H- + CH3 → CH4 + e-1.00e-9 0.00 0.0010 - 41000
2CH4+ + C2H2 → C2H2+ + CH41.13e-9 0.00 0.0010 - 41000
3CH4+ + C2H4 → C2H4+ + CH41.38e-9 0.00 0.0010 - 41000
4CH4+ + CH3OH → CH3OH+ + CH41.80e-9-0.50 0.0010 - 41000
5CH4+ + H2CO → H2CO+ + CH41.62e-9-0.50 0.0010 - 41000
6CH4+ + H2S → H2S+ + CH49.45e-10-0.50 0.0010 - 41000
7CH4+ + NH3 → NH3+ + CH41.65e-9-0.50 0.0010 - 41000
8CH4+ + O2 → O2+ + CH43.90e-10 0.00 0.0010 - 41000
9CH4+ + OCS → OCS+ + CH44.20e-10 0.00 0.0010 - 41000
10CH3CHO + CRPHOT → CO + CH41.30e-17 0.00263.5010 - 41000
11CH3COCH3 + CRPHOT → H2CCO + CH41.30e-17 0.00750.0010 - 41000
12CH3OCH3 + CRPHOT → H2CO + CH41.30e-17 0.00857.0010 - 41000
13HCOOCH3 + CRPHOT → CO2 + CH41.30e-17 0.001000.0010 - 41000
14C2H4+ + e- → CH4 + C5.60e-9-0.76 0.0010 - 300
15C2H5OH+ + e- → H2CO + CH41.50e-7-0.50 0.0010 - 300
16CH3CHOH+ + e- → CO + CH4 + H8.47e-7-0.74 0.0010 - 1000
17CH3OCH4+ + e- → CH3 + CH4 + O7.48e-7-0.70 0.0010 - 1000
18CH5+ + e- → CH4 + H1.40e-8-0.52 0.0010 - 300
19PCH4+ + e- → P + CH43.00e-7-0.50 0.0010 - 300
20C+ + CH3CH3 → C2H2+ + CH48.25e-11 0.00 0.0010 - 41000
21C2H2 + C2H5+ → C3H3+ + CH46.84e-11 0.00 0.0010 - 41000
22C2H3+ + CH3CH3 → C3H5+ + CH42.48e-10 0.00 0.0010 - 41000
23C2H4+ + CH2CCH → C4H3+ + CH48.00e-10-0.50 0.0010 - 41000
24C2H4+ + CH3CH3 → C3H6+ + CH45.15e-13 0.00 0.0010 - 41000
25C2H4+ + H2S → H2CS+ + CH47.42e-11-0.50 0.0010 - 41000
26C2H4 + C2H5+ → C3H5+ + CH43.90e-10 0.00 0.0010 - 41000
27C2H4 + PH2+ → PCH2+ + CH41.44e-10 0.00 0.0010 - 41000
28C + CH5+ → CH4 + CH+1.20e-9 0.00 0.0010 - 41000
29CH2 + CH5+ → CH4 + CH3+9.60e-10 0.00 0.0010 - 41000
30CH3+ + C2H4 → C2H3+ + CH43.50e-10 0.00 0.0010 - 41000
31CH3+ + CH3CH3 → C2H5+ + CH41.48e-9 0.00 0.0010 - 41000
32CH3+ + CH3CHO → CH3CO+ + CH41.65e-10-0.50 0.0010 - 41000
33CH3+ + CH3OCH3 → CH3CHOH+ + CH43.50e-10-0.50 0.0010 - 41000
34CH3+ + CH3OH → H3CO+ + CH42.30e-9-0.50 0.0010 - 41000
35CH3+ + H2CO → HCO+ + CH41.60e-9-0.50 0.0010 - 41000
36CH3+ + SiH4 → SiH3+ + CH41.80e-9 0.00 0.0010 - 41000
37CH3OH + C3H+ → HC3O+ + CH41.76e-9-0.50 0.0010 - 41000
38CH3OH + PH2+ → H2PO+ + CH45.40e-10-0.50 0.0010 - 41000
39CH5+ + C2 → C2H+ + CH49.50e-10 0.00 0.0010 - 41000
40CH5+ + C2H2 → C2H3+ + CH41.60e-9 0.00 0.0010 - 41000
41CH5+ + C2H4 → C2H5+ + CH41.50e-9 0.00 0.0010 - 41000
42CH5+ + C2H → C2H2+ + CH49.00e-10 0.00 0.0010 - 41000
43CH5+ + C6H6 → C6H7+ + CH42.00e-9 0.00 0.0010 - 300
44CH5+ + CH3CH3 → C2H7+ + CH41.20e-9 0.00 0.0010 - 41000
45CH5+ + CO2 → HCO2+ + CH43.20e-11 0.00 0.0010 - 41000
46CH5+ + CO → HCO+ + CH41.00e-9 0.00 0.0010 - 41000
47CH5+ + H2CO → H3CO+ + CH44.50e-9-0.50 0.0010 - 41000
48CH5+ + H2O → H3O+ + CH43.70e-9-0.50 0.0010 - 41000
49CH5+ + H2S → H3S+ + CH41.50e-9-0.50 0.0010 - 41000
50CH5+ + HC3N → HC3NH+ + CH44.50e-9-0.50 0.0010 - 41000
51CH5+ + HCN → HCNH+ + CH41.20e-9-0.50 0.0010 - 41000
52CH5+ + HCO → H2CO+ + CH48.50e-10-0.50 0.0010 - 41000
53CH5+ + HCl → H2Cl+ + CH42.06e-9-0.50 0.0010 - 41000
54CH5+ + HNC → HCNH+ + CH41.20e-9-0.50 0.0010 - 41000
55CH5+ + Mg → Mg+ + CH4 + H1.40e-9 0.00 0.0010 - 41000
56CH5+ + N2O → HN2O+ + CH49.00e-10 0.00 0.0010 - 41000
57CH5+ + S → HS+ + CH41.30e-9 0.00 0.0010 - 41000
58CH5+ + SiH4 → SiH3+ + CH4 + H22.00e-9 0.00 0.0010 - 41000
59CH + CH5+ → CH4 + CH2+6.90e-10-0.50 0.0010 - 41000
60H3+ + C2H5OH → CH3+ + CH4 + H2O1.50e-9-0.50 0.0010 - 41000
61H3+ + C2H5OH → H3CO+ + CH4 + H24.00e-10-0.50 0.0010 - 41000
62H3+ + CH3CHCH2 → C2H3+ + CH4 + H29.00e-10 0.00 0.0010 - 41000
63H3+ + CH3COCH3 → C2H3+ + CH4 + H2O1.16e-9-0.50 0.0010 - 41000
64H3+ + CH3COCH3 → CH3CO+ + CH4 + H21.08e-9-0.50 0.0010 - 41000
65H3+ + CH3COCH3 → CH5+ + CO + CH42.31e-10-0.50 0.0010 - 41000
66HCN + C2H7+ → CH3CNH+ + CH42.20e-10-0.50 0.0010 - 41000
67NH2 + CH5+ → NH3+ + CH49.90e-10-0.50 0.0010 - 41000
68NH3 + CH5+ → NH4+ + CH42.50e-9-0.50 0.0010 - 41000
69NH + CH5+ → CH4 + NH2+7.10e-10-0.50 0.0010 - 41000
70OH + CH5+ → H2O+ + CH47.00e-10-0.50 0.0010 - 41000
71CH3 + C2H3 → C2H2 + CH41.70e-10-1.50300.00300 - 900
72CH3 + CH3 → CH4 + CH27.13e-12 0.005052.001950 - 2300
73CH3 + H2CO → HCO + CH41.34e-15 5.051636.00300 - 2500
74CH3 + H2O → OH + CH42.30e-15 3.476681.00300 - 3000
75CH3 + H2S → HS + CH43.30e-13 0.001105.00300 - 2500
76CH3 + HCO → CO + CH42.00e-10 0.00 0.00300 - 2500
77CH3 + HNO → NO + CH43.32e-12 0.00 0.0010 - 913
78CH3 + NH2 → CH4 + NH4.76e-17 5.77-151.00300 - 2000
79CH3 + NH3 → CH4 + NH29.55e-14 0.004890.00300 - 2500
80CH3 + O2H → O2 + CH46.00e-12 0.00 0.0010 - 2500
81CH3 + OH → CH4 + O3.27e-14 2.202240.00298 - 2500
82H2 + CH3 → CH4 + H6.86e-14 2.744740.00300 - 2500
83CH3CHO + PHOTON → CO + CH41.10e-9 0.00 1.5010 - 41000
84CH3OCH3 + PHOTON → H2CO + CH41.50e-9 0.00 1.6010 - 41000

Variation of log fractional abundance (relative to H2) with log time (years) in a dark cloud model. Ref. RATE12 paper.