Ammonium paratungstate

Ammonium paratungstate Basic information

Product Name:	Ammonium paratungstate
Synonyms:	TUNGSTEN ICP STANDARD;TUNGSTEN ICP/DCP STANDARD;TUNGSTEN ATOMIC SPECTROSCOPY STANDARD;TUNGSTEN ATOMIC ABSORPTION STANDARD;TUNGSTEN AA STANDARD;Wolfram;W HC 40;tungstate(w12(oh)2o4019-),decaammonium
CAS:	11120-25-5
MF:	H4NO42W12(-9)
MW:	2896.08
EINECS:	234-364-9
Product Categories:	Catalysis and Inorganic Chemistry;Chemical Synthesis;Ammonium Salts;Metal and Ceramic Science;Salts;Tungsten
Mol File:	11120-25-5.mol

Ammonium paratungstate Chemical Properties

Melting point	3410 °C(lit.)
Boiling point	5660 °C(lit.)
density	2.3 g/mL at 25 °C(lit.)
vapor pressure	0Pa at 25℃
form	wire
color	White
Water Solubility	Soluble in water. Insoluble in alcohol
Merck	13,567
Exposure limits	ACGIH: TWA 3 mg/m3 NIOSH: TWA 1 mg/m3; STEL 3 mg/m3
InChIKey	WFKWXMTUELFFGS-UHFFFAOYSA-N
CAS DataBase Reference	11120-25-5(CAS DataBase Reference)
EPA Substance Registry System	Tungstate (W12(OH)2O4010-), decaammonium (11120-25-5)

Safety Information

Hazard Codes	F,Xi
Risk Statements	11-36/38-36/37/38
Safety Statements	6-26-36
RIDADR	UN 3089 4.1/PG 2
WGK Germany	-
RTECS	YO7175000
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	28418010

MSDS Information

Provider	Language
Ammonium tungstate	English
SigmaAldrich	English
ACROS	English
ALFA	English

Ammonium paratungstate Usage And Synthesis

Chemical Properties	White crystals. Soluble in water; insoluble in alcohol.
Uses	Ammonium tungsten oxide hydrate is used in production of tungsten alloys. It is used, refluxing the ammonia solution is advisable to speed up the dissolution of the oxide.
Uses	manufacture of tungsten alloys.
Flammability and Explosibility	Notclassified
Purification Methods	It crystallises from warm water on adding EtOH and cooling.

Ammonium paratungstate Preparation Products And Raw materials

Raw materials	Sodium hydroxide-->Hydrochloric acid-->Sulfuric acid-->Sodium chloride-->Ammonia-->Ammonium chloride-->Calcium chloride-->HEAVY CUT RESIDUE OIL-->Magnesium chloride hexahydrate-->Magnesium chloride-->Calcium chloride hexahydrate
Preparation Products	Tungstic acid-->Tungsten-->AMMONIUM METATUNGSTATE-->AMMONIUM TUNGSTATE PENTAHYDRATE (99.999%-W) PURATREM

TUNGSTATE Ammonium hydroxide Ammonium paratungstate AMMONIUM Ammonium nitrate AMMONIUM TUNGSTATE, ORTHO Tungsten carbide TUNGSTEN(VI) CHLORIDE Calcium tungstate Ammonium chloride Ammonium citrate tribasic SILVER TUNGSTATE Ammonium acetate Molybdic acid TUNGSTEN TETRACHLORIDE TUNGSTEN SULFIDE Ammonium sulfate AMMONIUM TUNGSTATE PENTAHYDRATE

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