found: Wikipedia, Nov. 8, 2012:Lead hydrogen arsenate (Lead hydrogen arsenate, also called lead arsenate, acid lead arsenate or LA, chemical formula PbHAsO₄, is an inorganic insecticide used primarily against the potato beetle. Lead arsenate was the most extensively used arsenical insecticide. Two principal formulations of lead arsenate were marketed: basic lead arsenate (Pb₅OH(AsO₄)₃) and acid lead arsenate (PbHAsO₄).)
found: Lead arsenate EPA pesticide fact sheet 12/86, viewed online Nov. 8, 2012(Common Name: Lead Arsenate. Chemical Name: Acid Orthoarsenate - PbHAsO4; Basic Orthoarsenate - Pb4(PbOH) (AsO4)3. Trade Name: Lead Arsenate, Gypsine, Security, Talbot. Pesticide Type: Growth Regulator, Insecticide, Herbicide, and Fungicide. Chemical Family: Inorganic Arsenicals)
found: Peryea, F.J. Historical use of lead arsenate insecticides, resulting soil contamination and implications for soil remediation, 1998, viewed online Nov. 8, 2012(Lead arsenate (LA) was the most extensively used of the arsenical insecticides. It was first prepared as an insecticide in 1892 for use against gypsy moth (Lymantria dispar) in Massachusetts; LA was rapidly adopted for insecticidal use throughout the world; Lead arsenate pastes and powders also were sold commercially. Their formulations became more refined over time and eventually two principal forms were marketed: basic lead arsenate [Pb₅OH(AsO₄)₃] for use in certain areas in California, and acid lead arsenate [PbHAsO₄] for all other locations)
found: Lead arsenate hazardous substance fact sheet, via New Jersey Dept. of Health Right to Know Program website, Nov. 8, 2012(Common name: Lead arsenate. Synonyms: Acid lead arsenate. Chemical name: Arsenic acid (H₃AsO₄), Lead (2+) salt (1:1). An odorless, heavy white powder; used to kill insects, weeds, and rodents)
