Sodium cobaltinitrite

Sodium cobaltinitrite

Names
IUPAC name sodium hexanitritocobaltate(III)
Identifiers
CAS Number	13600-98-1 N
3D model (Jmol)	Interactive image
ChemSpider	13198283 Y
ECHA InfoCard	100.033.692
PubChem CID	16211641
InChI InChI=1S/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1 Y Key: IMBXIBFCGMYSME-UHFFFAOYSA-N Y InChI=1/Co.6NO2.3Na/c;6*2-1-3;;;/q-3;;;;;;;3*+1/rCoN6O12.3Na/c8-2(9)1(3(10)11,4(12)13,5(14)15,6(16)17)7(18)19;;;/q-3;3*+1 Key: IMBXIBFCGMYSME-PEVTYUNUAJ
SMILES [Na+].[Na+].[Na+].O=[N+]([O-])[Co-3]([N+]([O-])=O)([N+](=O)[O-])([N+]([O-])=O)([N+]([O-])=O)[N+]([O-])=O
Properties
Chemical formula	CoN6Na3O12
Molar mass	403.93 g·mol−1
Hazards
Safety data sheet	JT Baker MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

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.

The compound is prepared by oxidation of cobalt(II) salts in the presence of sodium nitrite:

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. In geochemical analysis, sodium cobaltinitrite is used to distinguish alkali feldspars from plagioclase feldspars in thin section.