10035

Ammonium metatungstate hydrate

≥85% WO₃ basis (gravimetric)

• Synonym(s): AMT, Hexaammonium wolframate hydrate, Tungstic acid hexaammonium salt
• Linear Formula: (NH₄)₆H₂W₁₂O₄₀ · xH₂O
• CAS Number: 12333-11-8
• Molecular Weight: 2956.30 (anhydrous basis)
• EC Number: 234-733-4
• MDL number: MFCD00150662
• UNSPSC Code: 12352300
• PubChem Substance ID: 57646791
• NACRES: NA.23

Properties

• Assay: ≥85% WO₃ basis (gravimetric)
• form: solid
• reaction suitability: reagent type: catalyst; core: tungsten
• impurities: ≤0.005% water-insoluble matter
• loss: ≤15% loss on ignition
• mp: 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
• InChI key: ZBHPUDGBNLMJQH-UHFFFAOYSA-F

Description

General description

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.

Application

• 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).

Safety Information

• Pictograms: GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H302,H318
• Precautionary Statements: P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves