SODIUM HEXANITROCOBALTATE(III)[Na3Co(NO2)6]

 CAS Number 13600-98-1

·         Linear Formula Na₃Co(NO₂)₆

·         Molecular Weight 403.94

·          EC Number 237-077-7

·          MDL number MFCD00003512

·          PubChem Substance ID 329752417

Sodium cobaltinitrite is a coordination compound with the formula Na₃Co(NO₂)₆. The anion of this yellow-coloured salt consists of a cobalt(III) center N-bonded to six nitrito ligands. It is a reagent for the qualitative test for potassium and ammonium ions.

Detailed description

Application for analysis of potassium

Although the sodium cobaltinitrite is soluble in water, it forms the basis of a quantitative determination of potassium, thallium, and ammonium ions. Under the recommended reaction conditions the insoluble double salt, K₂Na[Co(NO₂)₆]·H₂O is precipitated and weighed.^[3] In geochemical analysis, sodium cobaltinitrite is used to distinguish alkali feldspars from plagioclase feldspars in thin section.

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