arsenate n : a salt or ester of arsenic acid

English

Noun

1. Any salt or ester of arsenic acid.
2. The anion AsO43-.

Derived terms

• barium arsenate
• calcium arsenate
• chromated copper arsenate
• copper arsenate
• dihydrogen arsenate
• hydrogen arsenate
• hydrogen sodium arsenate
• lead arsenate
• lead hydrogen arsenate
• monosodium methyl arsenate
• sodium arsenate
• sulfarsenate

Translations

External links

The arsenate ion is AsO43−.

An arsenate (compound) is some compound that contains this ion.

Ions

Arsenate is much like phosphate.

• In acid conditions we have arsenic acid, H3AsO4;
• in weakly acid conditions we have the dihydrogen arsenate ion, H2AsO4−;
• in weakly basic conditions we have hydrogen arsenate ion HAsO42−;
• and finally, in basic conditions, the arsenate ion AsO43−.

Arsenate has a valency of 5 and is also known as pentavalent arsenic

Arsenate poisoning

Arsenate can replace inorganic phosphate in the step of glycolysis that produces1,3-bisphosphoglycerate to produce 1-arseno-3-phosphoglycerate instead. This molecule is unstable and quickly hydrolyzes, forming the next intermediate in the pathway, 3-phosphoglycerate. Therefore glycolysis proceeds, but the ATP molecule that would be generated from 1,3-bisphosphoglycerate is lost - arsenate is an uncoupler of glycolysis.

External links

• Case Studies in Environmental Medicine - Arsenic Toxicity