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
Sodium Thiosulfate-5-Hydrate Extra Pure
CAS 10102-17-7 · ≥99.5% AR
1. Product identity
| Product name | Sodium Thiosulfate-5-Hydrate Extra Pure |
|---|---|
| C.A.S. number | 10102-17-7 |
| Grade / standard | ≥99.5% AR |
| Description | White crystals |
| Product group | Volumetric & Titrimetric Standards |
| Category | Laboratory & Analytical Reagents |
| 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 | White crystals | Complies | Visual |
| 2 | Identification | Conforms to the structure of the substance | Complies | FTIR / Chemical test |
| 3 | Solubility | As per specification | Complies | Visual / Monograph |
| 4 | Assay | Not less than 99.5 % w/w | 99.61 | Titrimetry / Instrumental |
| 5 | Matter Insoluble in Water | Not more than 0.01 % w/w | 0.0022 | Gravimetry |
| 6 | pH (5 % aqueous solution) | As per specification | 8.1 | Potentiometry |
| 7 | Chloride (Cl) | Not more than 0.001 % | 0.00049 | Turbidimetry |
| 8 | Sulphate (SO4) | Not more than 0.002 % | 0.00097 | Turbidimetry |
| 9 | Iron (Fe) | Not more than 5 ppm | 0.91 ppm | ICP-OES |
| 10 | Heavy Metals (as Pb) | Not more than 5 ppm | Less than 2 ppm | ICP-OES |
| 11 | Moisture | Not more than 1.0 % w/w | 0.13 | Karl Fischer / Gravimetry |
3. Declaration
This document sets out the standard specification for Sodium Thiosulfate-5-Hydrate Extra Pure 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