A7302

Ammonium molybdate tetrahydrate

ACS reagent, 81.0-83.0% MoO₃ basis

• Synonym(s): Ammonium heptamolybdate tetrahydrate, Molybdic acid ammonium salt tetrahydrate
• Linear Formula: (NH₄)₆Mo₇O₂₄ · 4H₂O
• CAS Number: 12054-85-2
• Molecular Weight: 1235.86
• EC Number: 234-320-9
• MDL number: MFCD00167059
• UNSPSC Code: 12352302
• PubChem Substance ID: 329770925
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• Agency: suitable for SM 5210
• Assay: 81.0-83.0% MoO₃ basis
• form: crystalline
• reaction suitability: reagent type: catalyst; core: molybdenum
• impurities: ≤0.005% Insoluble matter
• density: 2.498 g/mL at 25 °C (lit.)
• anion traces: arsenate, phosphate, and silicate (as SiO₂): ≤0.001%; chloride (Cl^-): ≤0.002%; nitrate (NO₃^-): passes test (limit about 0.003%); phosphate (PO₄^3-): ≤5 ppm; sulfate (SO₄^2-): ≤0.02%
• cation traces: Mg: ≤0.005%; heavy metals: ≤0.001% (as lead)
• storage temp.: room temp
• SMILES string: N.N.N.N.N.N.O.O.O.O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O.O[Mo](O)(=O)=O
• InChI: 1S/7Mo.6H3N.10H2O.18O/h;;;;;;;6*1H3;10*1H2;;;;;;;;;;;;;;;;;;/q;;;;3*+2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-6
• InChI key: FIXLYHHVMHXSCP-UHFFFAOYSA-H

Description

General description

Ammonium molybdate tetrahydrate (AMT) is a molybdenum salt, often employed in cryo-negative staining that helps to identify particles while preserving the material. As a catalyst, it is used to desulfurize thiophene and its derivatives.

Application

Ammonium molybdate tetrahydrate can be used as:

• A molybdenum source in the synthesis of sodium molybdate dihydrate (Na₂MoO₄·2H₂O).
• A molybdenum source in the synthesis of nickel molybdate nanorods (NiMoO₄) by co-precipitation method in the presence of nickel benzoate as a nickel source.
• A precursor in the synthesis of Mn-MoS₂ (MMS). MMS is employed in the production of MMS/rGO (reduced graphene oxide) composite that exhibits the highest rhodamine B (RhB) degradation efficiency.
• A catalyst in the synthesis of PVDF (polyvinylidene fluoride) catalytic microcapsules. PVDF is a heterogeneous catalyst for the selective oxidation of benzyl alcohol to benzaldehyde.

Quality

May contain darkened ammonium molybdate crystals that are soluble in water.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable