Ammonium Metatungstate Hydrate
| Chinese Name | 偏鎢酸銨水合物 | Ca | ≤10 mg/kg |
| English Name | Ammonium metatungstate hydrate | Cd | ≤5 mg/kg |
| Chemical Formula | (NH4)6H2W12O40 ? xH2O | Co | ≤10 mg/kg |
| Molecular Weight | 2974.3 | Cu | ≤5 mg/kg |
| CAS Number | 12333-11-8 | Fe | ≤5 mg/kg |
| Melting Point | 100 °C (dec.)(lit.) | K | ≤10 mg/kg |
| MDL Number | MFCD00150662 | Na | ≤10 mg/kg |
| Grade | T | Ni | ≤5 mg/kg |
| WO3 Content | ≥99.0% | Pb | ≤5 mg/kg |
| Impurity | ≤0.005% insoluble in water | Zn | ≤10 mg/kg |
| Solubility in Water | 0.1 g / mL,clear and colorless | - | - |
Ammonium metatungstate hydrate was used as a source of tungsten, during preparation of catalysts, in an experimental procedure conducted, for identifying by-products produced by catalytic dehydration of d-xylose, using two-dimensional gas chromatography-time-of-flight mass spectrometry. It was also used as a complexing agent, found to be advantageous in the depolymerisation of polytungstate anions, and to promote effective arrangement and coordination of nickel around tungsten species, in an experimental study investigating the structure-function relationship of Ni-W sulphide hydrogenation catalysts.
Related Products:
Purple tungsten oxide phase composition of WO2.72 (or W18O49), which is one of tungsten oxide, abbreviated VTO, is a purple crushed crystalline powder, the color generally purple or blue purple.
Sodium tungstate is mainly used for the preparation of ammonium paratungstate and the depth of preparation of tungsten trioxide, cemented carbide, tungsten, ammonium tungstate, tungstic acid and other tungsten compounds used in petrochemicals, inks and so on.
Ammonium paratungstate is a chemical substance, mainly white crystals, there are two kinds of tablets or acupuncture for the manufacture of tungsten trioxide or blue tungsten oxide metal tungsten powder.
Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3.H2O, the dihydrate WO3.2H2O is also known. The solid state structure of WO3. H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.
0.6um yellow tungsten oxide, an oxide of tungsten, the appearance of a positive yellow powder, stable at room temperature, the apparent density of 0.6-1.0g / cm3.
Blue Tungsten Oxide refers to a class of dark blue compounds containing a mixed valence state of tungsten (VI) and tungsten (V). The appearance is dark blue powder.