Scapex Exports Pvt. Ltd.
830, 8th Floor, Sun Gravitas, Times of India Road,
Shyamal, Ahmedabad 380015, Gujarat, India
+91 9925522674 · info@scapexexports.com
CIN U46909GJ2025PTC164345
Shyamal, Ahmedabad 380015, Gujarat, India
+91 9925522674 · info@scapexexports.com
CIN U46909GJ2025PTC164345
Certificate of AnalysisStandard product specification
Ammonium tungsten oxide hydrate
CAS 12028-48-7 · H6NO2W+3 · Fine chemical grade — assay on specification
Structural formula1. Product identity
| Product name | Ammonium tungsten oxide hydrate |
|---|---|
| C.A.S. number | 12028-48-7 |
| Molecular formula | H6NO2W+3 |
| Molecular weight | 235.89 g/mol |
| Grade / standard | Fine chemical grade — assay on specification |
| Description | Crystalline powder |
| Product group | Metal Salts & Alkoxides |
| Category | Inorganic Salts & Compounds |
| Country of origin | India |
| Packing | Bags, drums, carboys, IBC or ISO tank as applicable — customer-specified packing available |
| Storage | Cool, dry, well-ventilated place in tightly closed original packing |
2. Analytical specification
| S. No. | Test parameter | Specification | Typical result | Method |
|---|---|---|---|---|
| 1 | Description | Crystalline powder | Complies | Visual |
| 2 | Identification | Conforms to the structure of the substance | Complies | FTIR / Chemical test |
| 3 | Solubility | As per specification | Complies | Visual / Monograph |
| 4 | Matter Insoluble in Water | Not more than 0.05 % w/w | 0.021 | Gravimetry |
| 5 | pH (5 % w/v aqueous solution) | As per specification | 6.7 | Potentiometry |
| 6 | Chloride (as Cl) | Not more than 0.01 % w/w | 0.0018 | Turbidimetry / IC |
| 7 | Sulphate (as SO4) | Not more than 0.02 % w/w | 0.0023 | Turbidimetry / IC |
| 8 | Iron (as Fe) | Not more than 20 ppm | 5.3 ppm | ICP-OES / AAS |
| 9 | Heavy Metals (as Pb) | Not more than 10 ppm | Less than 5 ppm | ICP-OES |
| 10 | Moisture | Not more than 1.0 % w/w | 0.24 | Karl Fischer / Gravimetry |
3. Declaration
This document sets out the standard specification for Ammonium tungsten oxide hydrate and applies to all consignments of this product and grade supplied by Scapex Exports Pvt. Ltd. It is not a lot-specific release document; a lot-specific certificate carrying the analysis of the material actually shipped is issued with, and travels with, each consignment. Scapex Exports supplies against customer-specified assay limits and pharmacopoeial standards — send your specification sheet and we confirm compliance in writing before the order is accepted.
SCAPEXQUALITY ASSURED