Sodium metavanadate

Sodium metavanadate is the inorganic compound with the formula NaVO₃.^[1] It is a yellow, water-soluble salt.

Sodium metavanadate

Names
IUPAC name Sodium trioxovanadate(V)
Identifiers
CAS Number	13718-26-8 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:75221 N
ChemSpider	24427
DrugBank	DB14702
ECHA InfoCard	100.033.869
EC Number	237-272-7
PubChem CID	4148882
RTECS number	YW1050000
UNII	252S9L5606 Y
UN number	3285 (SODIUM VANADATE)
CompTox Dashboard (EPA)	DTXSID3044336
InChI Key: CMZUMMUJMWNLFH-UHFFFAOYSA-N InChI=1S/Na.3O.V/q+1;;;-1;
SMILES [O-][V](=O)=O.[Na+]
Properties
Chemical formula	NaVO3
Molar mass	121.9295 g/mol
Appearance	yellow crystalline solid
Density	2.84g/cm3
Melting point	630 °C (1,166 °F; 903 K)
Solubility in water	19.3 g/100 mL (20 °C) 40.8 g/100 mL (80 °C)
Thermochemistry
Heat capacity (C)	97.6 J/mol K
Std molar entropy (S⦵298)	113.8 J/mol K
Std enthalpy of formation (ΔfH⦵298)	−1148 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Toxic, irritant
NFPA 704 (fire diamond)	2 0 0
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (median dose)	98 mg/kg (rat, oral)
Related compounds
Other anions	Sodium orthovanadate
Other cations	Ammonium metavanadate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Chain of tetrahedral vanadate [VO₄]⁻ units, each sharing two corners

Sodium metavanadate is a common precursor to other vanadates. At low pH it converts to sodium decavanadate. It is also precursor to exotic metalates such as [γ-PV₂W₁₀O₄₀]^5-, [α-PVW₁₁O₄₀]^4-, and [β-PV₂W₁₀O₄₀]^5-.^[2]

Minerals

Sodium metavanadate occurs as two minor minerals, metamunirite (anhydrous) and a dihydrate, munirite. Both are very rare, metamunirite is now known only from vanadium- and uranium-bearing sandstone formations of central-western USA and munirite from Pakistan and South Africa.^[3]