232084

Molybdic acid

≥85.0% MoO₃ basis, ACS reagent

• CAS Number: 7782-91-4
• EC Number: 231-970-5
• MDL number: MFCD00036287
• UNSPSC Code: 12352300
• PubChem Substance ID: 329752396
• NACRES: NB.24

Properties

• grade: ACS reagent
• Quality Level: 200
• vapor density: 6.2 (vs air)
• assay: ≥85.0% MoO₃ basis
• form: powder
• reaction suitability: reagent type: catalyst; core: molybdenum
• impurities: ≤0.01% insol. dil. NH₄OH
• solubility: water: insoluble
• density: 3.1 g/mL at 25 °C (lit.)
• anion traces: AsO₄^3-, PO₄^3- and SiO₂: ≤0.001%; chloride (Cl^-): ≤0.002%; phosphate (PO₄^3-): ≤5 ppm; sulfate (SO₄^2-): ≤0.2%
• cation traces: heavy metals: ≤0.003%
• SMILES string: O[Mo](O)(=O)=O
• InChI: 1S/Mo.2H2O.2O/h;2*1H2;;/q+2;;;;/p-2
• InChI key: VLAPMBHFAWRUQP-UHFFFAOYSA-L

Description

General description

Molybdic acid is the hydrated form of molybdenum trioxide. It is used in the synthesis Froehde reagent.

Application

Molybdic acid can be used:

• In the preparation of silica-supported molybdic acid catalyst for the synthesis of pyrano [2,3-c] chromene derivatives by condensation of aldehydes, malononitrile, and 4-hydroxycoumarin.
• In the synthesis of Froehde reagent for the presumptive identification of alkaloids like opioids.
• As a molybdenum source in the preparation of MoSe₂.

Other Notes

Consists largely of an ammonium molybdate

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable