Product name:Sodium cobaltinitrite
CAS:13600-98-1
Molecular Formula:CoN6Na3O12
Formula Weight:403.94
Specification:25g
Description:
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 bound to six nitrito ligands. It is used as a qualitative test for potassium and ammonium ions (provided that certain other cations are absent).Although the sodium salt is soluble in water, those of potassium and ammonium are insoluble. The potassium and ammonium salts are precipitated as yellow solids.
Sodium cobaltinitrite also forms the basis of a quantitative determination of potassium. However under the recommended reaction conditions the insoluble double salt, K2Na[Co(NO2)6].H2O is precipitated and weighed. Also thallium(I) can be determined as the precipitate is Tl3[Co(NO2)6].