Phenylarsonic acid

Phenylarsonic acid
Stereo structural formula of phenylarsonic acid
Names
	Preferred IUPAC name Phenylarsonic acid
	Other names Benzenearsonic acid
Identifiers
CAS Number	98-05-5 ;
3D model (JSmol)	Interactive image;
Abbreviations	PAA
Beilstein Reference	2935741
ChEBI	CHEBI:29851;
ChEMBL	ChEMBL364571;
ChemSpider	7087 ;
ECHA InfoCard	100.002.393
EC Number	202-631-9;
Gmelin Reference	131185
MeSH	Benzenearsonic+acid
PubChem CID	7365;
RTECS number	CY3150000;
UNII	57F9KU116M ;
UN number	1557
CompTox Dashboard (EPA)	DTXSID6059158 ;
	InChI InChI=1S/C6H7AsO3/c8-7(9,10)6-4-2-1-3-5-6/h1-5H,(H2,8,9,10) Key: LVKZSFMYNWRPJX-UHFFFAOYSA-N ;
	SMILES O[As](O)(=O)C1=CC=CC=C1;
Properties
Chemical formula	C6H7AsO3
Molar mass	202.041 g·mol−1
Appearance	Colourless solid
Density	1.76 g cm−3
Melting point	154 to 158 °C (309 to 316 °F; 427 to 431 K)
Solubility in water	low
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Toxic
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Phenylarsonic acid is the chemical compound with the formula C₆H₅AsO(OH)₂, commonly abbreviated PhAsO₃H₂. This colourless solid is an organic derivative of arsenic acid, AsO(OH)₃, where one OH group has been replaced by a phenyl group. The compound is a buffering agent and a precursor to other organoarsenic compounds, some of which are used in animal nutrition, e.g. 4-hydroxy-3-nitrobenzenearsonic acid.