Certificate of Analysis and technical specification for Sodium Tripolyphosphate (STPP) — CAS 7758-29-4. Applies to all consignments of this product and grade.
| Product Name | Sodium Tripolyphosphate (STPP) |
|---|---|
| C.A.S. Number | 7758-29-4 |
| Product Category | Home Care & Detergent Chemicals |
| Product Group | Builders & Fillers |
| Grade / Standard | 94% min |
| Physical Form | White 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 | White 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 | Assay | Not less than 94.0 % w/w | 95.29 | Titrimetry (Epton / two-phase) |
| 5 | pH (1 % aqueous solution) | 7.0 – 10.0 | 9.4 | Potentiometry |
| 6 | Free Alkali | Not more than 0.5 % w/w | 0.212 | Titrimetry |
| 7 | Matter Insoluble in Alcohol | Not more than 2.0 % w/w | 0.82 | Gravimetry |
| 8 | Moisture | Not more than 1.0 % w/w | 0.42 | Karl Fischer / Gravimetry |
This document sets out the standard specification for Sodium Tripolyphosphate (STPP) 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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