Acrylic acid

Acrylic acid
Names
	IUPAC name Acrylic acid
	Preferred IUPAC name Prop-2-enoic acid
	Other names Acrylic acid; Acroleic acid; Ethylenecarboxylic acid; Propenoic acid; Vinylformic acid; Methyleneacetic acid;
Identifiers
CAS Number	79-10-7 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	635743
ChEBI	CHEBI:18308 ;
ChEMBL	ChEMBL1213529 ;
ChemSpider	6333 ;
DrugBank	DB02579 ;
ECHA InfoCard	100.001.071
EC Number	201-177-9;
Gmelin Reference	1817
KEGG	D03397 ;
PubChem CID	6581;
RTECS number	AS4375000;
UNII	J94PBK7X8S ;
CompTox Dashboard (EPA)	DTXSID0039229 ;
	InChI InChI=1S/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5) Key: NIXOWILDQLNWCW-UHFFFAOYSA-N ; InChI=1/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5) Key: NIXOWILDQLNWCW-UHFFFAOYAJ;
	SMILES O=C(O)C=C; C=CC(=O)O;
Properties
Chemical formula	C3H4O2
Molar mass	72.063 g/mol
Appearance	Clear, colorless liquid
Odor	Acrid
Density	1.051 g/mL
Melting point	14 °C (57 °F; 287 K)
Boiling point	141 °C (286 °F; 414 K)
Solubility in water	Miscible
log P	0.28
Vapor pressure	3 mmHg
Acidity (pKa)	4.25 (H2O)
Viscosity	1.3 cP at 20 °C (68 °F)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H226, H302, H312, H314, H332, H400
Precautionary statements	P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P273, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P370+P378, P391, P403+P235, P405, P501
NFPA 704 (fire diamond)	3 2 2
Flash point	68 °C (154 °F; 341 K)
Autoignition; temperature	429 °C (804 °F; 702 K)
Explosive limits	2.4–8.02%
	NIOSH (US health exposure limits):
PEL (Permissible)	None
REL (Recommended)	TWA 2 ppm (6 mg/m3) [skin]
IDLH (Immediate danger)	N.D.
Safety data sheet (SDS)	MSDS
Related compounds
Other anions	acrylate
Related carboxylic acids	acetic acid; propionic acid; lactic acid; 3-hydroxypropionic acid; malonic acid; butyric acid; crotonic acid
Related compounds	allyl alcohol; propionaldehyde; acrolein; methyl acrylate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Acrylic acid (IUPAC: propenoic acid) is an organic compound with the formula CH₂=CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform. More than a million tons are produced annually.

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