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463922

Sigma-Aldrich

Ammonium metatungstate hydrate

99.99% trace metals basis

Sinonimo/i:

Ammonium tungsten oxide hydrate, Hexaammonium wolframate hydrate

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About This Item

Formula condensata:
(NH4)6H2W12O40 · xH2O
Numero CAS:
12333-11-8
Peso molecolare:
2956.30 (anhydrous basis)
Numero CE:
234-733-4
Numero MDL:
MFCD00150662
Codice UNSPSC:
12352302
ID PubChem:
24870120
NACRES:
NA.23
Saggio:
99.99% trace metals basis
Stato:
powder

Livello qualitativo

100

Saggio

99.99% trace metals basis

Stato

powder

Impiego in reazioni chimiche

reagent type: catalyst
core: tungsten

Impurezze

≤150.0 ppm Trace Metal Analysis

Punto di fusione

100 °C (dec.) (lit.)

Stringa SMILE

N.N.N.N.N.N.O.O[W]1O[W](O)(=O)(O1)O[W]2(=O)(=O)O[W](O)(=O)(O2)O[W]3(=O)(=O)O[W](O)(=O)(O3)O[W]4(=O)(=O)O[W](O)(=O)(O[W]5(=O)(=O)O[W](O)(=O)(O[W]6(=O)(=O)O[W](O)(O)O6)O5)O4

InChI

1S/6H3N.9H2O.32O.12W/h6*1H3;9*1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;6*+1;+2/p-8
ZBHPUDGBNLMJQH-UHFFFAOYSA-F

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Descrizione generale

Ammonium metatungstate is a Keggin-type heteropoly compound. It can be prepared by polycondensation of ammonium tungstate solutions. It is widely used as a precursor for preparing tungsten catalysts for hydrocracking and as a fuel cell catalyst.

Applicazioni

Ammonium metatungstate can be used as a precursor to synthesize:
  • Carbon-supported tungsten catalyst for hydrogenolysis of cellulose.
  • Reduced tungsten and mixed tungsten oxide catalysts for bifunctional hydroisomerization of n-alkanes.
  • Hybrid 2D/3D tungsten diselenide transistors via chemical vapor deposition method.

Pittogrammi

CorrosionExclamation mark
GHS05,GHS07

Avvertenze

Danger

Indicazioni di pericolo

H302,H318

Consigli di prudenza

P280 - P305 + P351 + P338

Classi di pericolo

Acute Tox. 4 Oral - Eye Dam. 1

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 2

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

dust mask type N95 (US), Eyeshields, Gloves

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Certificati d'analisi (COA)

Lot/Batch Number
0000325011
MKCV7949
0000325011
MKCV0154
MKCS7444

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