Phenoxyacetic acid

Phenoxyacetic acid
Names
	Preferred IUPAC name Phenoxyacetic acid
Identifiers
CAS Number	122-59-8;
3D model (JSmol)	Interactive image;
Beilstein Reference	907949
ChEBI	CHEBI:8075;
ChEMBL	ChEMBL173521;
ChemSpider	18107;
ECHA InfoCard	100.004.143
EC Number	204-556-7;
Gmelin Reference	142730
KEGG	C02181;
PubChem CID	19188;
UNII	YRC253429Q;
UN number	3347
CompTox Dashboard (EPA)	DTXSID9025873;
	InChI InChI=1S/C8H8O3/c9-8(10)6-11-7-4-2-1-3-5-7/h1-5H,6H2,(H,9,10) Key: LCPDWSOZIOUXRV-UHFFFAOYSA-N;
	SMILES C1=CC=C(C=C1)OCC(=O)O;
Properties
Chemical formula	C8H8O3
Molar mass	152.15 g/mol
Appearance	White solid or tan powder
Odor	Sweet and sour
Melting point	98–99 °C (208–210 °F; 371–372 K)
log P	1.48
Acidity (pKa)	3.7
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phenoxyacetic acid, POA, is a white solid with the formula of C₈H₈O₃. Although not itself usefully active as an herbicide, it forms the part-structure of many phenoxy herbicide derivatives including MCPA and 2,4-D.