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463922

Sigma-Aldrich

Ammonium metatungstate hydrate

99.99% trace metals basis

Sinônimo(s):

Ammonium tungsten oxide hydrate, Hexaammonium wolframate hydrate

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About This Item

Fórmula linear:
(NH4)6H2W12O40 · xH2O
Número CAS:
12333-11-8
Peso molecular:
2956.30 (anhydrous basis)
Número CE:
234-733-4
Número MDL:
MFCD00150662
Código UNSPSC:
12352302
ID de substância PubChem:
24870120
NACRES:
NA.23

Nível de qualidade

100

Ensaio

99.99% trace metals basis

forma

powder

adequação da reação

reagent type: catalyst
core: tungsten

Impurezas

≤150.0 ppm Trace Metal Analysis

pf

100 °C (dec.) (lit.)

cadeia de caracteres SMILES

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

chave InChI

ZBHPUDGBNLMJQH-UHFFFAOYSA-F

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Descrição geral

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.

Aplicação

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.

Pictogramas

CorrosionExclamation mark
GHS05,GHS07

Palavra indicadora

Danger

Frases de perigo

H302,H318

Declarações de precaução

P280 - P305 + P351 + P338

Classificações de perigo

Acute Tox. 4 Oral - Eye Dam. 1

Código de classe de armazenamento

11 - Combustible Solids

Classe de risco de água (WGK)

WGK 2

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

dust mask type N95 (US), Eyeshields, Gloves

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Certificados de análise (COA)

Lot/Batch Number
MKCQ3304
MKCN8610
MKCL9901
MKCJ7512
MKCF8919

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