Carbon Dioxide
CO₂·44.009 g/mol·Inorganic·CID 280
Greenhouse GasCommon
A linear triatomic molecule produced by combustion and respiration. Key greenhouse gas and the carbon source for photosynthesis. Solid CO₂ (dry ice) sublimes at −78.5°C.
IUPAC: carbon dioxide
Also known as: carbonic anhydride, 124-38-9, carbonic acid gas, Carbonic acid anhydride, methanedione (+14 more)
Molecular Structure
Molecular Propertiesmass · H-bonds · stereo
Molecular Weight
44.009g/mol
Exact Mass
43.989829Da
Monoisotopic Mass
43.989829Da
XLogP
0.9
Polar Surface Area
34.1Ų
Complexity
18
Formal Charge
0
H-Bond Donors
0
H-Bond Acceptors
2
Rotatable Bonds
0
Heavy Atoms
3
Stereo Centers
0
Bond Stereo
0
Drug-Likeness (Lipinski's Rule of Five)
✓ 44.0 g/mol
MW ≤ 500
✓ 0.9
LogP ≤ 5
✓ 0
H-bond donors ≤ 5
✓ 2
H-bond acceptors ≤ 10
Passes all rules — good oral bioavailability predicted
GHS Hazard Classification
Warning
Hazards
H280Contains gas under pressure; may explode if heatedH281Contains refrigerated gas; may cause cryogenic burns or injuryH336May cause drowsiness or dizziness
Source: PubChem GHS Classification. Always consult the SDS for handling.
Constituent Elements
Isomers8 compounds with formula CO₂
(113C)methanedione
CID 10129882 · 45.0 g/mol
methanedi(18O2)one
CID 12130228 · 48.0 g/mol
methanedi(17O2)one
CID 12415844 · 46.0 g/mol
CID 6857677
CID 6857677 · 44.0 g/mol
(114C)methanedione
CID 119388 · 46.0 g/mol
(111C)methanedione
CID 10197607 · 43.0 g/mol
(113C)methanedi(18O2)one
CID 24947461 · 49.0 g/mol
methanedi(18O)one
CID 9920366 · 46.0 g/mol