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Chemical infobox

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Carbon dioxide
Carbon dioxide
Carbon dioxide
Other names Carbonic acid gas,
Carbonic anhydride,
dry ice (solid)
Molecular formula CO2
Molar mass 44.0095(14) g/mol
Solid state Dry ice, carbonia
Appearance colourless gas
CAS number [124-38-9]
Properties
Density and phase 1600 kg/m³, solid
1.98 kg/m³, gas at 298 K
Solubility in water 1.45 kg/m³
Latent heat of
vaporization
25.13 kJ/mol
Melting point −57 °C (216 K), pressurized
Boiling point −78 °C (195 K), sublimes
Acidity (pKa) 6.35 and 10.33
Viscosity 0.07 cP at −78 °C
Structure
Molecular shape linear
Crystal structure quartz-like
Dipole moment zero
Hazards
MSDS MSDS Data
Main hazards asphyxiant, irritant
NFPA 704

NFPA 704 svg.png

0
0
0
 
(liquid)
R/S statement R: As, Fb
S: 9, 23, 36a (liquid)
RTECS number FF6400000
Supplementary data page
Structure & properties n, εr, etc.
Spectral data UV, IR, NMR, MS
Related compounds
Related oxides carbon monoxide
carbon suboxide
dicarbon monoxide
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references