Carbon Monoxide
CO·28.010 g/mol·Inorganic·CID 281
⚠ ToxicCommon
A colorless, odorless, poisonous gas. Contains a triple bond (one σ, two π) making it isoelectronic with N₂. Binds hemoglobin ~200× more strongly than oxygen.
IUPAC: carbon monoxide
Also known as: carbon monooxide, Carbonic oxide, Carbon oxide (CO), 630-08-0, carbon(II) oxide (+14 more)
Molecular Structure
Molecular Propertiesmass · H-bonds · stereo
Molecular Weight
28.010g/mol
Exact Mass
27.994915Da
Monoisotopic Mass
27.994915Da
XLogP
0.7
Polar Surface Area
1.0Ų
Complexity
10
Formal Charge
0
H-Bond Donors
0
H-Bond Acceptors
1
Rotatable Bonds
0
Heavy Atoms
2
Stereo Centers
0
Bond Stereo
0
Drug-Likeness (Lipinski's Rule of Five)
✓ 28.0 g/mol
MW ≤ 500
✓ 0.7
LogP ≤ 5
✓ 0
H-bond donors ≤ 5
✓ 1
H-bond acceptors ≤ 10
Passes all rules — good oral bioavailability predicted
GHS Hazard Classification
Danger
Hazards
H220Extremely flammable gasH331Toxic if inhaledH221Flammable gasH280Contains gas under pressure; may explode if heatedH360May damage fertility or the unborn childH372Causes damage to organs through prolonged or repeated exposureH370Causes damage to organsH373May causes damage to organs through prolonged or repeated exposure
Source: PubChem GHS Classification. Always consult the SDS for handling.
Constituent Elements
Isomers8 compounds with formula CO
(113C)methylidyneoxidanium
CID 9793682 · 29.0 g/mol
(111C)methylidyneoxidanium
CID 10313038 · 27.0 g/mol
methanidylidyne(15O)oxidanium
CID 10129878 · 27.0 g/mol
methylidyneoxidanium
CID 6857676 · 28.0 g/mol
methanone
CID 11966310 · 28.0 g/mol
(114C)methylidyneoxidanium
CID 10307848 · 30.0 g/mol
methanidylidyne(18O)oxidanium
CID 11263463 · 30.0 g/mol
(112C)methylidyneoxidanium
CID 16212711 · 28.0 g/mol