Acrylic Acid

A carboxylic acid, C3H4O2, 72.063 g/mol. Boiling point 141.2 °C, melting point 13.5 °C, as published.

verified recordOrganic — carboxylic acid8 measured properties

Identifiers

Molecular formula: C₃H₄O₂
Molecular weight: 72.063 g/mol
Exact mass: 72.021129 g/mol
IUPAC name: prop-2-enoic acid
SMILES: C=CC(=O)O
InChI: InChI=1S/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5)
InChIKey: NIXOWILDQLNWCW-UHFFFAOYSA-N

Open in ReactionLens Use 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: 286 °F at 760 mmHg (NTP, 1992)measured · CAMEO Chemicals; 141.2 °Cmeasured · DrugBank
Melting Point: 55 °F (NTP, 1992)measured · CAMEO Chemicals; 13.5 °Cmeasured · DrugBank
Density: 1.0497 at 68 °F (USCG, 1999) - Denser than water; will sinkmeasured · CAMEO Chemicals; 1.0511 g/cu cm at 20 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Solubility: greater than or equal to 100 mg/mL at 63 °F (NTP, 1992)measured · CAMEO Chemicals; 1000000 mg/Lmeasured · DrugBank
Vapor Pressure: 3.2 mmHg at 68 °F ; 5 mmHg at 81.1 °F (NTP, 1992)measured · CAMEO Chemicals; 3.97 [mmHg]measured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
LogP: 0.35measured · DrugBank; log Kow = 0.35measured · Hazardous Substances Data Bank (HSDB)
Flash Point: 130 °F (NTP, 1992)measured · CAMEO Chemicals; 50 °Cmeasured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Refractive Index: Index of refraction: 1.4224 at 20 °C/Dmeasured · Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-8; Index of refraction: 1.4185 at 25 °Cmeasured · Bauer W Jr; Acrylic Acid and Derivatives. Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2017). New York, NY: John Wiley & Sons. Online Posting Date: 20 Jun 2003

Calculated properties

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

Molecular weight: 72.06 g/molcalculated · reference compound database; Average mass of one molecule, from reference compound database.
Exact mass: 72.021129366 Dacalculated · reference compound database; Mass of the most common isotopic form.
XLogP3: 0.3calculated · reference compound database; Estimated oil/water partition, computed by reference compound database.
Polar surface area: 37.3 Å²calculated · reference compound database; Polar surface area as computed by reference compound database.
Complexity: 55calculated · reference compound database; A rough measure of how intricate the structure is.
H-bond donors: 1calculated · reference compound database
H-bond acceptors: 2calculated · reference compound database
logP: 0.257calculated · chemistry engine; Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area: 37.3 Å²calculated · chemistry engine; Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors: 1calculated · chemistry engine; Atoms that can donate a hydrogen bond.
H-bond acceptors: 1calculated · chemistry engine; Atoms that can accept a hydrogen bond.
Rotatable bonds: 1calculated · chemistry engine; Single bonds the molecule can freely twist around.
Molar refractivity: 17.8328 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: 0.4509calculated · chemistry engine; Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

C Carbon3 atoms · 50.0% by mass
O Oxygen2 atoms · 44.4% by mass
H Hydrogen4 atoms · 5.6% by mass

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

Structure

Heavy atoms, hydrogen excluded: 5
Total atoms, hydrogen included: 9
Rings: 0
Aromatic rings: 0
Stereocentres: 0
Formal charge: 0

Functional groups

Carboxylic acid
A carbon double-bonded to oxygen and bonded to an –OH group; acidic.
Alkene
A carbon–carbon double bond.

Matched by structural pattern, not by a measurement.

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

No documented reaction with a written procedure and a source involves Acrylic Acid yet.

Other names for it

The systematic name on this record is prop-2-enoic acid.

The sources also call it 2-Propenoic acid, prop-2-enoic acid, Propenoic acid, Vinylformic acid, Acroleic acid, Ethylenecarboxylic acid, Propene acid, Glacial acrylic acid, Kyselina akrylova, Acrylic acid, glacial, RCRA waste number U008.

Structurally related

Nothing structurally close to Acrylic Acid has a page here yet.

Seen alongside it in reaction records

Molecules that appear in the same recorded reactions as Acrylic Acid. 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.

1,2-Dichloroethane

used as a reactant

C₂H₄Cl₂, 98.96 g/mol.

1,4-Dioxane

used as a reactant

C₄H₈O₂, 88.106 g/mol.

Where these values came from

reference compound database6581
compound record
chemistry engine
structure perception

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.