Potassium metaarsenite

Structural formula
General
Surname	Potassium metaarsenite
other names	Potassium arsenite Potassium-m-arsenite
Molecular formula	K 3 As 3 O 6
Brief description	white solid
External identifiers / databases
CAS number 13464-35-2 EC number 236-680-2 ECHA InfoCard 100.033.332 PubChem 23668346 Wikidata Q414359
properties
Molar mass	438.05 g mol −1
Physical state	firmly
solubility	easily soluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 331-301-410 P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Potassium metaarsenite is an inorganic chemical compound of potassium from the arsenite group .

Extraction and presentation

Potassium metaarsenite can be obtained by reacting arsenic (III) oxide with potassium bicarbonate .

${\displaystyle \mathrm {As_{2}O_{3}+2\ KHCO_{3}\longrightarrow 2\ KAsO_{2}+2\ CO_{2}+H_{2}O} }$

properties

Potassium metaarsenite is an incombustible white solid that is easily soluble in water. It is chemically unstable at elevated temperatures.

use

Potassium metaarsenite was used therapeutically for various ailments until the 1960s. For example, it is part of Fowler's solution . Today it occurs in strong dilution as a so-called "supplement" in the Schüssler salts .

Related links

• Potassium orthoarsenite , K ₃ AsO ₃
• Potassium arsenate K ₃ AsO ₄

Individual evidence

1. ↑ ^{a b c d e} Entry on potassium metaarsenite in the GESTIS substance database of the IFA , accessed on October 28, 2016(JavaScript required) .
2. ^ ^{A b} William M. Haynes: CRC Handbook of Chemistry and Physics, 93rd Edition . CRC Press, 2016, ISBN 978-1-4398-8050-0 , pp. 82 ( limited preview in Google Book search).
3. ^ ^{A b} Daniel Schenk: Pharmaceutical-chemical internship production, testing and theoretical elaboration of pharmaceutical-chemical preparations . Springer-Verlag, 2013, ISBN 978-3-642-92537-5 , pp. 69 ( limited preview in Google Book search).
4. ↑ Thomas Feichtinger, Susana Niedan-Feichtinger: Extension funds in biochemistry according to Dr. Schüßler basics, materia medica, areas of application . Georg Thieme Verlag, 2009, ISBN 978-3-8304-7346-6 , p. 24 ( limited preview in Google Book search).