10035

Ammoniummetawolframat Hydrat

≥85% WO₃ basis (gravimetric)

• Synonym(e): AMT, Hexaammonium wolframate hydrate, Tungstic acid hexaammonium salt
• Lineare Formel: (NH₄)₆H₂W₁₂O₄₀ · xH₂O
• CAS-Nummer: 12333-11-8
• Molekulargewicht: 2956.30 (anhydrous basis)
• EG-Nummer: 234-733-4
• MDL-Nummer: MFCD00150662
• UNSPSC-Code: 12352300
• PubChem Substanz-ID: 57646791
• NACRES: NA.23

Eigenschaften

• Assay: ≥85% WO₃ basis (gravimetric)
• Form: solid
• Eignung der Reaktion: reagent type: catalyst; core: tungsten
• Verunreinigungen: ≤0.005% water-insoluble matter
• Verlust: ≤15% loss on ignition
• mp (Schmelzpunkt): 100 °C (dec.) (lit.)
• SMILES String: 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
• InChIKey: ZBHPUDGBNLMJQH-UHFFFAOYSA-F

Beschreibung

Allgemeine Beschreibung

Ammonium metatungstate hydrate is used as a starting material to prepare catalysts for the reduction of NO_x. It can also be used as a precursor to synthesize tungsten oxide thin films by chemical vapor deposition method.

Anwendung

• Effect of morphology properties of NiW catalysts on hydrodesulfurization for individual sulfur compounds in fluid catalytic cracking diesel: This research discusses the influence of ammonium metatungstate hydrate in the preparation of NiW catalysts, focusing on its role in hydrodesulfurization processes (X Tao et al., 2014).
• Preparation of quaternary tungsten bronze nanoparticles by a thermal decomposition of ammonium metatungstate with oleylamine: This study examines the decomposition pathways of ammonium metatungstate hydrate into metatungstate anions and their applications in creating tungsten bronze nanoparticles (J Choi et al., 2015).

Sicherheitshinweise

• Piktogramme: GHS05,GHS07
• Signalwort: Danger
• H-Sätze: H302,H318
• P-Sätze: P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
• Gefahreneinstufungen: Acute Tox. 4 Oral - Eye Dam. 1
• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable
• Persönliche Schutzausrüstung: dust mask type N95 (US), Eyeshields, Gloves