Roxarsone

Roxarsone
Names
	Preferred IUPAC name (4-Hydroxy-3-nitrophenyl)arsonic acid
Identifiers
CAS Number	121-19-7 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	1976533
ChEBI	CHEBI:35817 ;
ChEMBL	ChEMBL1321154;
ChemSpider	4925 ;
ECHA InfoCard	100.004.049
EC Number	204-453-7;
Gmelin Reference	1221211
KEGG	D05771 ;
MeSH	Roxarsone
PubChem CID	5104;
RTECS number	CY5250000;
UNII	H5GU9YQL7L ;
UN number	3465
CompTox Dashboard (EPA)	DTXSID9020956 ;
	InChI InChI=1S/C6H6AsNO6/c9-6-2-1-4(7(10,11)12)3-5(6)8(13)14/h1-3,9H,(H2,10,11,12) Key: XMVJITFPVVRMHC-UHFFFAOYSA-N ; InChI=1/C6H6AsNO6/c9-6-2-1-4(7(10,11)12)3-5(6)8(13)14/h1-3,9H,(H2,10,11,12) Key: XMVJITFPVVRMHC-UHFFFAOYAF;
	SMILES Oc1ccc(cc1[N+](=O)[O-])[As](O)(O)=O; OC1=CC=C(C=C1[N+]([O-])=O)[As](O)(O)=O;
Properties
Chemical formula	C; 6AsNH; 6O; 6
Molar mass	263.0365 g mol−1
Melting point	> 300 °C (572 °F; 573 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H410
Precautionary statements	P261, P273, P301+P310, P311, P501
	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

Roxarsone is an organoarsenic compound that has been used in poultry production and to a lesser extent in pig production as a feed additive to increase weight gain, for greater feed efficiency, to improve pigmentation, and as a coccidiostat. Until June 2011, it was approved for use in the United States, Canada, Australia, and 12 other countries. It is no longer approved for use in most jurisdictions.

Roxarsone has been banned in the European Union since 1999. Its use in the United States was voluntarily ended by the manufacturers in June 2011, and it has been illegal since 2013. Its use was suspended in Malaysia in June 2011. It was banned in Canada in August 2011. In Australia, its use was discontinued in 2012.