Lead hydrogen arsenate

Lead hydrogen arsenate
Names
	Other names Lead (II) monohydrogen arsenate
Identifiers
CAS Number	7784-40-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:81881;
ChemSpider	22976;
ECHA InfoCard	100.029.149
EC Number	232-064-2;
PubChem CID	24572;
UNII	A9AI2R9EWN ;
UN number	1617
CompTox Dashboard (EPA)	DTXSID4042092 ;
	InChI InChI=1S/AsH3O4.Pb/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+2/p-2 Key: UWRBYRMOUPAKLM-UHFFFAOYSA-L;
	SMILES O[As](=O)([O-])[O-].[Pb+2];
Properties
Chemical formula	PbHAsO4
Molar mass	347.1 g·mol−1
Appearance	white solid
Density	5.943 g/cm3
Melting point	Decomposes at 280°C
Solubility in water	Insoluble in water; soluble in nitric acid and alkalies
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H350, H360Df, H373, H410
Precautionary statements	P201, P202, P260, P261, P264, P270, P271, P273, P281, P301+P310, P304+P340, P308+P313, P311, P314, P321, P330, P391, 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

Lead hydrogen arsenate, also called lead arsenate, acid lead arsenate or LA, chemical formula PbHAsO₄, is an inorganic insecticide formerly used to control pests including gypsy moth, potato beetle and rats.

Lead arsenate was the most extensively used arsenical insecticide. Two principal formulations of lead arsenate were marketed: basic lead arsenate (Pb₅OH(AsO₄)₃, CASN: 1327-31-7) and acid lead arsenate (PbHAsO₄).

It is now banned for use as a pesticide in countries such as the US and UK as it is considered too toxic and persistent.