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Ammonium metavanadate

CAS number : 7803-55-6

Molecular weight :116.98

Molecular formula/chemical symbol :NH4VO3

Description :

acid that acts as an insulin mimic. It functions as a catalyst in certain reactions and is known to have toxic effects in certain species. It has been found in slags and fly ash from coal burning which has been known to cause respiratory problems. Ammonium metavanadate belongs to the family of vanadates that contains many different oxidative states that are dependent on pH. Ammonium metavanadate is the most common laboratory vanadate reagent, along with potassium metavanadate, KVO₃.

Crystalline ammonium metavanadate contains infinitely long chains of corner-sharing VO₄ tetrahedra.

Ammonium vanadate


IUPAC name [hide] Ammonium trioxovanadate(V)
Other names[hide] Ammonium vanadate
Identifiers
CAS number	7803-55-6^Y
ChemSpider	19968892^Y
UNII	FL85PX638G^Y
RTECS number	YWD875000
Jmol-3D images	Image 1
SMILES [show] · [NH4+].O=[V-](=O)=O
InChI [show] ·InChI=1S/H3N.3O.V/h1H3;;;;/q;;;;-1/p+1^Y Key: UXJVWJGDHIZPLD-UHFFFAOYSA-O^Y InChI=1/H3N.3O.V/h1H3;;;;/q;;;;- 1/p+1/rH3N.O3V/c;1-4(2)3/h1H3;/q;-1/p+1 Key: UXJVWJGDHIZPLD-KKTKNITLAZ
Properties
Molecular formula	NH₄VO₃
Molar mass	116.98 g/mol
Appearance	slightly yellow crystalline solid, hygroscopic
Density	2.326 g/cm³
Melting point	200 °C (473 K)
Boiling point	Decomposes
Solubility in water	0.48 g/100 ml (20°C) 0.84 g/100ml (30°C) 1.32 g/100ml (40°C) 2.42 g/100ml (60°C) 7.0 g/100 mL (100 °C)
Solubility	insoluble in ether, NH₄Cl, alcohol soluble in diethanolamine
Hazards
EU Index	Not listed
Main hazards	possible mutagen, dangerous for the environment
Flash point	Non-flammable
LD₅₀	58.1 mg/kg, oral (rat)
Related compounds
Other anions	Ammonium orthovanadate Ammonium hexavanadate
Other cations	Sodium metavanadate Potassium metavanadate
Related compounds	Vanadium pentoxide
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

USES :

As chemical reagents, catalysts, driers, mordant. The ceramic industry is widely used as a glaze. Can also be used for the preparation of vanadium pentoxide.

Keywords:Fine ceramics

Report :

Product name		Ammonium metavanadate		CAS:7803-55-6
Description		slightly yellow crystalline solid
Formula		NH4VO3
TEST ITEMS	TEST RESULTS
	Electronic special		Chemically pure		Analytical grade
NH4VO3	≥99.5		≥98.0		≥99.0
Chloride（Cl）	≤0.001%		≤0.05%		≤0.005%
Sulfate（SO4）	≤0.005%		≤0.02%		≤0.01%
Carbonate（CO3）	Qualified		Qualified		Qualified
Fe	≤0.001%		≤0.01%		≤0.005%
Heavy metal（Pb）	≤0.001%
Ammonia solubility test	Qualified		Qualified		Qualified