Methylarsonic acid

Methylarsonic acid
Names
	Preferred IUPAC name Methylarsonic acid
	Other names Methanearsonic acid; Monomethylarsonic acid
Identifiers
CAS Number	124-58-3;
3D model (JSmol)	Interactive image;
Beilstein Reference	4-04-00-03682
ChemSpider	8604;
ECHA InfoCard	100.004.278
EC Number	204-705-6;
PubChem CID	8948;
RTECS number	PA1575000;
UNII	J37VJ5709S;
UN number	1557
CompTox Dashboard (EPA)	DTXSID4020903 ;
	InChI InChI=1S/CH5AsO3/c1-2(3,4)5/h1H3,(H2,3,4,5) Key: QYPPRTNMGCREIM-UHFFFAOYSA-N;
	SMILES C[As](=O)(O)O;
Properties
Chemical formula	CH5AsO3
Molar mass	139.970 g·mol−1
Appearance	white solid
Melting point	160.5 °C (320.9 °F; 433.6 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Methylarsonic acid is an organoarsenic compound with the formula CH₃AsO₃H₂. It is a colorless, water-soluble solid. Salts of this compound, e.g. disodium methyl arsonate, have been widely used in as herbicides and fungicides in growing cotton and rice.

Names

Preferred IUPAC name Methylarsonic acid
Other names Methanearsonic acid Monomethylarsonic acid
Identifiers
CAS Number	124-58-3
3D model (JSmol)	Interactive image
Beilstein Reference	4-04-00-03682
ChemSpider	8604
ECHA InfoCard	100.004.278
EC Number	204-705-6
PubChem CID	8948
RTECS number	PA1575000
UNII	J37VJ5709S
UN number	1557
CompTox Dashboard (EPA)	DTXSID4020903
InChI InChI=1S/CH5AsO3/c1-2(3,4)5/h1H3,(H2,3,4,5) Key: QYPPRTNMGCREIM-UHFFFAOYSA-N
SMILES C[As](=O)(O)O
Properties
Chemical formula	CH₅AsO₃
Molar mass	139.970 g·mol⁻¹
Appearance	white solid
Melting point	160.5 °C (320.9 °F; 433.6 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references