Ammonium Paratungstate (APT)
YNONYMS: Ammonium tungstate, Ammonium Tungsten Oxide, Ammonium Wolframite, Decaammonium tungstate
TRADE NAMES: Ammonium Paratungstate (APT), Ammonium Parawolframat (APW)
FORMULA: 5(NH4)20 x 12W03 x 5H20
MANUFACTURER: Hydrometallurg JSC, Nalchik, Kabardin-Balkarian Republic, Russia
CAS NO. 11120-25-5
EINECS No. 234-364-9
H.S. CODE: 2841.80.000.0
MAIN APPLICATIONS:
1.Calcination into tungsten oxides (under reducing conditions to form tungsten blue oxide W20O58, or under oxidizing conditions to form tungsten yellow trioxide W03) before the reduction process which produces the pure tungsten metal powder.
2. Carbonization to tungsten carbide powders and further mixing with Co for production of WC+Co mixed powders and formulations with other metals (Ta,Ti) for further conversion into tungsten shaped products: cutting tools, drilling bits and cemented carbides.
SECONDARY APPLICATIONS:
1. Decomposition by hydrochloric acid to form tungstic acid (provides bright yellow color to ceramic glazes and enamels).
2. Thermal decomposition to form ammonium metatungstate (feedstock for catalyst production).
*all the information mentioned is for indicative purposes only and can vary from lot to lot
| QUALITY SPECIFICATION | |||||
|---|---|---|---|---|---|
| PHYSICAL PROPERTIES | MAXIMUM IMPURITIES CONTENT, % | ||||
| PARAMETERS | GARANTEED VALUE | ELEMENTS | CONTENT, MAT., РРМ | ELEMENTS | CONTENT, MAT., РРМ |
| Appearance | White powder | AI | 10 | Мо | 30 |
| Particle Size (FSSS), pm | 35-40 | As | 10 | Na | 10 |
| Bulk Density, g/cm3 | 1,9 - 2,3 | Са | 8 | P | 10 |
|
CHEMICAL COMPOSITION (in absolut dru weight) |
Cr | 10 | S | 10 | |
| Fe | 10 | Si | 10 | ||
| Wo3 content, %, min.: | 88,8 | K | 10 | ||
|
Loss on ignition, %, max.:
Loss on ignition, %, max.:
Loss on ignition, %, max.:
Loss on ignition, %, max.:
|
11,2 | Mg | 10 | ||
PACKING:
2000 kg net big-bags (1000x1000x800mm) with PE lining stacked on 1200x1200mm fumigated wooden pallets or 200kg net steel drums with single/double PE inserts (4 drums per pallet) stacked on 1000x1000mm fumigated wooden pallets.
TRANSPORTATION INFORMATION:
Land transport: DOT(USA)/TDG(Canada): not regulated, RID/ADR class: not regulated, Shipping name : Ammonium Paratungstate; Sea transport:IMO/IMDG code: not restricted, Shipping name: Ammonium Paratungstate; Airtransport: ICAO/IATA class: not controlled, Shipping name: Ammonium Paratungstate
LABELLING: R/S phrases : R36/37/38, S26, 36