11120-25-5

Basic information

• Product Name: Ammonium paratungstate
• Synonyms: (NH4)10H2(W2O7)6;Ammonium (para)tungs;AMMoniuM Metagungstate;Ammonium (para)tungstate hydrate 99.99% trace metals basis;Ammonium (para)tungstate hydrate;Ammonium Paratungstat;Tungsten wire, gold plated, 0.05mm (0.002 in.) dia.;Tungsten, plasma standard solution, Specpure?
• CAS NO: 11120-25-5
• Molecular Formula: H40N10O20W5
• Molecular Weight: 1419.57
• EINECS: 231-143-9
• Product Categories: Ammonium Salts;Metal and Ceramic Science;Salts;Catalysis and Inorganic Chemistry;Chemical Synthesis;Tungsten
• Mol File: 11120-25-5.mol
• Article Data: 0

Chemical Properties

• Melting Point: 3410 °C(lit.)
• Boiling Point: 5660 °C(lit.)
• Appearance: White/wire
• Density: 2.3 g/mL at 25 °C(lit.)
• Vapor Pressure: 0Pa at 25℃
• Water Solubility: Soluble in water. Insoluble in alcohol
• Merck: 13,567
• CAS DataBase Reference: Ammonium paratungstate(CAS DataBase Reference)
• NIST Chemistry Reference: Ammonium paratungstate(11120-25-5)
• EPA Substance Registry System: Ammonium paratungstate(11120-25-5)

Safety Data

• Hazard Codes: F,Xi
• Statements: 11-36/38-36/37/38
• Safety Statements: 6-26-36
• RIDADR: UN 3089 4.1/PG 2
• RTECS: YO7175000
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 11120-25-5(Hazardous Substances Data)

Usage

Chemical Properties

White crystals. Soluble in water; insoluble in alcohol.

Uses

Different sources of media describe the Uses of 11120-25-5 differently. You can refer to the following data:
1. 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.
2. manufacture of tungsten alloys.

Flammability and Explosibility

Notclassified

Purification Methods

It crystallises from warm water on adding EtOH and cooling.

InChI:InChI=1/2H3N.4O.W/h2*1H3;;;;;/q;;;;2*-1;/p+2/r2H3N.O4W/c;;1-5(2,3)4/h2*1H3;/q;;-2/p+2

Related news

Direct solid state synthesis of W–Al2O3 nanostructured composite using Ammonium paratungstate (cas 11120-25-5) (APT) and Al powder mixture07/26/2019

W–Al2O3 nanostructured composite has been produced by mechanical milling of ammonium paratungstate (APT) and Al powder mixture at room temperature. The milled products have been characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM) equipped with energy dispersive spec...detailed

Carburization of Ammonium paratungstate (cas 11120-25-5) by methane: The influence of reaction parameters07/25/2019

Tungsten carbide powder is conventionally produced by carburization of tungsten powder by carbon black in a solid–solid reaction. This paper reports the carburization of ammonium paratungstate by methane to yield tungsten carbide at low temperature in short times. The carbide powder is fine gra...detailed

Comparing thermal and mechanochemical decomposition of Ammonium paratungstate (cas 11120-25-5) (APT)07/24/2019

In this research, the possibility of mechanochemical decomposition of ammonium paratungstate (APT) has been studied, and compared with thermal decomposition method. For this purpose, APT powders were milled using a planetary ball mill up to 36 h and under air atmosphere. For thermal decompositio...detailed

Thermal decomposition of Ammonium paratungstate (cas 11120-25-5) tetrahydrate: New insights by a combined thermal and kinetic analysis07/23/2019

The thermal decomposition of ammonium paratungstate tetrahydrate has been studied in oxidising atmosphere at four heating rates employing the analytical techniques TG, DTG, DSC, and MS. In total, three endothermic and two exothermic effects have been detected. From the combined thermal and kinet...detailed

Thermal decomposition of Ammonium paratungstate (cas 11120-25-5) hydrate in air and inert gas atmospheres07/22/2019

In this study, the thermal decomposition of ammonium paratungstate hydrate was investigated in dynamic air and inert gas (nitrogen and argon) atmospheres by simultaneous thermo-gravimetric analysis (TGA), differential thermal analysis (DTA) and mass spectroscopy (MS). The intermediate and end pr...detailed

Decomposition-carbonization of Ammonium paratungstate (cas 11120-25-5) in a fluidized bed07/21/2019

In this study, the reduction-carbonization property of WO3 obtained by thermal decomposition of ammonium paratungstate (APT) under N2 and air atmosphere in a fluidized bed was investigated. The decomposition property of APT in N2 and air was analyzed by TG analyzer. Phase, morphology, deoxidatio...detailed

Dissolving behavior of Ammonium paratungstate (cas 11120-25-5) in (NH4)2CO3–NH3·H2O–H2O system07/19/2019

The effects of temperature, ammonia concentration and ammonium carbonate concentration on the dissolving behavior of ammonium paratungstate were studied in (NH4)2CO3–NH3·H2O–H2O system. The results show that rising temperature, prolonging duration, increasing ammonia concentration and decreas...detailed