7784-40-9

Basic information

• Product Name: LEAD ARSENATE
• Synonyms: acidleadarsenate;acidleadorthoarsenate;arsenateoflead;arsenicacid(h3aso4),lead(2+)salt(1:1);arsenicacid(h3aso4),lead(2++)salt(1:1);LEAD ARSENATE;arsenicacid,lead(2+)salt(1:1);Arsenicacidlead(2+)salt(1:1)
• CAS NO: 7784-40-9
• Molecular Formula: AsHO4Pb
• Molecular Weight: 347.13
• EINECS: 232-064-2
• Mol File: 7784-40-9.mol
• Article Data: 0

Chemical Properties

• Melting Point: decomposes at 1042℃ [HAW93]
• Appearance: /white monoclinic crystals
• Density: 5.79
• Water Solubility: insoluble H2O; soluble HNO3, alk [CRC10]
• CAS DataBase Reference: LEAD ARSENATE(CAS DataBase Reference)
• NIST Chemistry Reference: LEAD ARSENATE(7784-40-9)
• EPA Substance Registry System: LEAD ARSENATE(7784-40-9)

Safety Data

• Hazard Codes: T,N
• Statements: 45-61-23/25-33-50/53-62
• Safety Statements: 53-45-60-61
• RIDADR: 1617
• HazardClass: 6.1
• PackingGroup: II
• Hazardous Substances Data: 7784-40-9(Hazardous Substances Data)

Usage

Description

Lead arsenate appears as odourless white heavy powder and practically is insoluble in water. It is not combustible and emits irritating or toxic fumes (or gases) in a fire. Lead arsenate is currently used as a growth regulator on grape fruit crop. A large bulk of lead arsenate is also used annually to control cockroaches, silverfish, crickets, earthworms, and other soil-inhabiting insects on golf greens and lawns and on airport turf adjoining runways to reduce bird hazard related to earthworm. Lead arsenate is quite stable and readily accumulates in soils either as a result of use in specific soil treatments or foliar application. Lead arsenate insecticide was used in many countries, including Australia, Canada, New Zealand, and the United States. It was used for insect pests on apples and other fruit tree, garden crops and turf grasses, on rubber and coffee trees, and for mosquito abatement in cattle dips. All insecticidal uses of lead arsenate in the United States were officially banned on August 1, 1988 (U.S. EPA, 1988), with a comment that all registrations for insecticidal use had lapsed before that date. In Australia, use of lead arsenate decreased after the introduction of DDT in 1950, and it has not been used on exported crops since 1983.

Chemical Properties

Lead arsenate is an odorless, white, heavy powder. It is not combustible and emits irritating or toxic fumes (or gases) in a fi re. Lead arsenate enters the body by inhalation, or from contaminated food and beverages. It is used to make insecticides.

Uses

Different sources of media describe the Uses of 7784-40-9 differently. You can refer to the following data:
1. Insecticide; veterinarian treatment as a teniacide and insecticide.
2. Lead arsenate [Pb3(AsO4)4] is a toxic commercial insecticide and herbicide.
3. As constituent of various insecticides for larvae of gypsy moth, boll weevil, etc.

Health Hazard

Exposures to lead arsenate occur in work areas and it is absorbed into the body by inhalation of its dust and by ingestion. It is irritating to the eyes, the skin, and the respiratory tract, and causes adverse effects on the gastrointestinal tract, nervous system, kidneys, liver, and blood. Accidental ingestion of lead arsenate in the workplace causes cough, sore throat, abdominal pain, diarrhea, drowsiness, headache, nausea, vomiting, muscular cramp, constipation, excitation, and disorientation in the worker.

InChI:InChI=1/AsH3O4.Pb/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+2/p-2