Sodium arsenite
Chemical compound
Summary
Sodium arsenite usually refers to the inorganic compound with the formula NaAsO2. Also called sodium meta-arsenite, it is an inorganic polymer consisting of the infinite chains [AsO2]n−n associated with sodium cations, Na+. The polymer backbone has the connectivity -O-As(O−)-. backbone. Sodium ortho-arsenite is Na3AsO3. Both compounds are colourless solids. A mixture of sodium meta-arsenite and sodium ortho-arsenite is produced by treating arsenic trioxide with sodium carbonate or sodium hydroxide. Sodium arsenite is amorphous, typically being obtained as a powder or as a glassy mass.
Originally created by Ping
12/27/2005, 7:22:04 AM
Modified
2/6/2026, 7:05:49 AM
Recent revisions
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correction of an incorrect formula NaAsO3 to NaAsO2: https://www.sigmaaldrich.com/CZ/en/product/aldrich/s7400?context=product
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