Ammonium arsenate

Structural formula
General
Surname	Ammonium arsenate
other names	Ammonium arsenate (V)
Molecular formula	(NH 4 ) 3 AsO 4
Brief description	white solid
External identifiers / databases
EC number	232-067-9
ECHA InfoCard	100.029.152
PubChem	24574
ChemSpider	22978
Wikidata	Q1587202
properties
Molar mass	176 g mol −1
Physical state	firmly
density	1.99 g cm −3
solubility	soluble in water
safety instructions
H and P phrases	H: 350-331-301-410
	P: ?
MAK	Switzerland: 0.1 mg m −3 (based on arsenic, measured as inhalable dust )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ammonium arsenate is an inorganic chemical compound from the group of arsenates .

Extraction and presentation

Ammonium arsenate can be obtained by reacting arsenic acid with ammonia to form the trihydrate.

{\ displaystyle \ mathrm {H_ {3} AsO_ {4} +3 \ NH_ {3} +3 \ H_ {2} O \ longrightarrow (NH_ {4}) _ {3} AsO_ {4} \ cdot 3H_ {2 } O}}

properties

Ammonium arsenate is a white solid that is in the form of rhombic crystal flakes. It loses ammonia and water in the air and changes into the hydrogen arsenate . When the aqueous solution is boiled, so much ammonia escapes that the composition of the solution corresponds to that of dihydrogen arsenate .

Individual evidence

^ ^A ^b ^c Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 25 ( limited preview in Google Book search).
↑ ^a ^b ^c Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 581.
^ Entry on ammonium arsenate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry arsenic compounds, with the exception of those named in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) on February 6, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for 7784-44-3 or ammonium arsenate ), accessed on October 24, 2016.

[Dale_L._Perry-1] A ^b ^c Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 25 ( limited preview in Google Book search).

[brauer-2] Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 581.

[3] Entry on ammonium arsenate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .

[CLP_100.240.769-4] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry arsenic compounds, with the exception of those named in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA) on February 6, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[5] Swiss Accident Insurance Fund (Suva): Limits - Current MAK and BAT values (search for 7784-44-3 or ammonium arsenate ), accessed on October 24, 2016.