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Carbon Dioxide

An inorganic compound, CO2, 44.009 g/mol. Boiling point Sublimes, melting point -109.3 °F, as published. Appears in 1 documented reaction.

verified record, Inorganic compound, 7 measured properties, 1 documented reactions

Identifiers

Molecular formula
CO₂
Molecular weight
44.009 g/mol
Exact mass
43.989829 g/mol
IUPAC name
carbon dioxide
SMILES
O=C=O
InChI
InChI=1S/CO2/c2-1-3
InChIKey
CURLTUGMZLYLDI-UHFFFAOYSA-N
Open in ReactionLensUse in reaction prediction

Measured properties

Published measurements, each with its source. Two readings of one property are both shown, in the units each used.

Boiling Point
Sublimes (NIOSH, 2024)measured · CAMEO Chemicals
Sublimes (NIOSH, 2024)measured · CAMEO Chemicals
Melting Point
-109.3 °F (USCG, 1999)measured · CAMEO Chemicals
-109 °F (Sublimes) (NIOSH, 2024)measured · CAMEO Chemicals
Density
1.56 at -110.2 °F (USCG, 1999) - Denser than water; will sinkmeasured · CAMEO Chemicals
Absolute density: 0.1146 lb/cu ft at 25 °C; density: (gas at 0 °C) 1.976 g/L at 760 mm Hg; (liq at 0 °C) 0.914 at 34.3 atm; (solid) at -56.6 °C) 1.512; critical density: 0.464measured · Hazardous Substances Data Bank (HSDB)
Solubility
0.2 % at 77 °F (NIOSH, 2024)measured · CAMEO Chemicals
0.2 % at 77 °F (NIOSH, 2024)measured · CAMEO Chemicals
Vapor Pressure
56.5 atm (NIOSH, 2024)measured · CAMEO Chemicals
56.5 atm (NIOSH, 2024)measured · CAMEO Chemicals
LogP
0.83measured · Human Metabolome Database (HMDB)
0.83measured · ILO-WHO International Chemical Safety Cards (ICSCs)
Flash Point
Not applicablemeasured · Hazardous Substances Data Bank (HSDB)

Calculated properties

Derived from the structure, not from a sample; kept apart from the measurements above.

Molecular weight
44.009 g/molcalculated · reference compound database
Average mass of one molecule, from reference compound database.
Exact mass
43.989829239 Dacalculated · reference compound database
Mass of the most common isotopic form.
XLogP3
0.9calculated · reference compound database
Estimated oil/water partition, computed by reference compound database.
Polar surface area
34.1 Ųcalculated · reference compound database
Polar surface area as computed by reference compound database.
Complexity
18calculated · reference compound database
A rough measure of how intricate the structure is.
H-bond donors
0calculated · reference compound database
H-bond acceptors
2calculated · reference compound database
logP
-0.5835calculated · chemistry engine
Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area
34.14 Ųcalculated · chemistry engine
Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors
0calculated · chemistry engine
Atoms that can donate a hydrogen bond.
H-bond acceptors
2calculated · chemistry engine
Atoms that can accept a hydrogen bond.
Rotatable bonds
0calculated · chemistry engine
Single bonds the molecule can freely twist around.
Molar refractivity
5.007 cm³/molcalculated · chemistry engine
Relates to the molecule's polarisability.
Fraction sp³ carbons
0calculated · chemistry engine
Share of carbon atoms with tetrahedral bonding.
QED drug-likeness
0.3642calculated · chemistry engine
Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

Percentages are of the molecular weight above, worked out the same way the molar mass calculator does it.

Structure

Heavy atoms, hydrogen excluded
3
Total atoms, hydrogen included
3
Rings
0
Aromatic rings
0
Stereocentres
0
Formal charge
0

The molecule in three dimensions

Rotate and inspect the atoms. Loaded only when you ask, so the page stays light.

The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.

Reactions it appears in

1 documented reaction involves Carbon Dioxide, each with a written procedure and a source, and all of them are combustion. A few are shown.

Combustion of methane

Combustion · as a product

A recorded experiment with its conditions, its yield where one was published, and a link to the source.

All 1 combustion records

Other names for it

The systematic name on this record is carbon dioxide.

The sources also call it carbonic anhydride, carbonic acid gas, Carbonic acid anhydride, methanedione, Carbonica, Kohlendioxyd, Carbon oxide, di-, Kohlensaure, Khladon 744, After-damp, AER Fixus.

Structurally related

Nothing structurally close to Carbon Dioxide has a page here yet.

Seen alongside it in reaction records

Molecules that appear in the same recorded reactions as Carbon Dioxide. This says nothing about structure: most of them are the bases, solvents, ligands and catalysts the chemistry needed, and they are here because somebody put them in the same flask.

1,1'-Carbonyldiimidazole

used as a reactant

C₇H₆N₄O, 162.152 g/mol.

1,2,4-Trichlorobenzene

used as a reactant

C₆H₃Cl₃, 181.449 g/mol.

1,2,3-Trichlorobenzene

used as a reactant

C₆H₃Cl₃, 181.449 g/mol.

1,4-Benzodioxin-2,3-dicarboxylic acid

formed as a product

C₁₀H₆O₆, 222.152 g/mol.

Where these values came from

compound record.

What this page does not claim

Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.

Where to next

More molecules under C

The rest of this shelf, a hundred names at a time.

Molar mass calculator

Work with CO2 in a calculation, with every element's contribution shown.

Molarity calculator

Grams of Carbon Dioxide for a volume and a concentration, or the concentration a mass gives.

Open in ReactionLens

The full record in the workstation: every atom, every bond, and the reactions it appears in.