Potassium arsenite
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| General | |||||||||||||||||||
| Surname | Potassium arsenite | ||||||||||||||||||
| other names |
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| Molecular formula | K 3 AsO 3 | ||||||||||||||||||
| Brief description |
white hygroscopic powder |
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| properties | |||||||||||||||||||
| Molar mass | 146.02 g mol −1 | ||||||||||||||||||
| Physical state |
firmly |
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| density |
2.876 g cm −3 |
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| Melting point |
Decomposes at 300 ° C (below melting point) |
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| solubility |
easily soluble in water |
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| safety instructions | |||||||||||||||||||
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| MAK |
repealed because it is carcinogenic |
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| Toxicological data | |||||||||||||||||||
| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | |||||||||||||||||||
Potassium arsenite (more precisely potassium orthoarsenite) is an inorganic-chemical compound. It is the potassium salt of arsenic acid .
properties
Potassium arsenite is a white, non-flammable powder that dissolves easily in water. When exposed to heat and in contact with the carbon dioxide in the air, it decomposes, releasing toxic, arsenic-containing vapors. Potassium arsenite forms arsine with acids .
safety instructions
Potassium arsenite poisoning is fatal even in small doses. The substance can be ingested orally (by mouth) or through the respiratory tract. Acute symptoms of poisoning include abdominal pain, burning sensation in the throat and chest, vomiting, diarrhea, dizziness, headache, shock or collapse. Potassium arsenite changes the genetic makeup and is highly carcinogenic.
Related links
- Potassium metaarsenite , KAsO 2
- Potassium arsenate K 3 AsO 4
Individual evidence
- ↑ a b c d e f g h Entry on potassium arsenite in the GESTIS substance database of the IFA , accessed on February 16, 2017(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 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .