Certificate of Analysis and technical specification for Sodium tungsten oxide, ACS, 99.0-101.0% — CAS 10213-10-2. Applies to all consignments of this product and grade.
| Product Name | Sodium tungsten oxide, ACS, 99.0-101.0% |
|---|---|
| C.A.S. Number | 10213-10-2 |
| Product Category | Inorganic Salts & Compounds |
| Product Group | Metal Salts & Alkoxides |
| Grade / Standard | Fine chemical grade — assay on specification |
| Physical Form | Crystalline powder |
| Country of Origin | India |
| Packing | Standard export packing — bags, drums, carboys, IBC or ISO tank as applicable |
| Storage | Cool, dry, well-ventilated place in tightly closed original packing |
| 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 | 0.019 | Gravimetry |
| 5 | pH (5 % w/v aqueous solution) | As per specification | 4.5 | Potentiometry |
| 6 | Chloride (as Cl) | Not more than 0.01 % w/w | 0.0024 | Turbidimetry / IC |
| 7 | Sulphate (as SO4) | Not more than 0.02 % w/w | 0.0067 | Turbidimetry / IC |
| 8 | Iron (as Fe) | Not more than 20 ppm | 5.1 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 | 0.35 | Karl Fischer / Gravimetry |
This document sets out the standard specification for Sodium tungsten oxide, ACS, 99.0-101.0% and applies to all consignments of this grade. It is not a lot-specific release document; a lot-specific certificate carrying the analysis of the material actually shipped is issued with each consignment. Scapex Exports supplies against customer-specified assay limits and pharmacopoeial standards — send your specification sheet and we will confirm compliance before order.
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