Certificate of Analysis and technical specification for Potassium Nitrate (AR) — CAS 7757-79-1. Applies to all consignments of this product and grade.
| Product Name | Potassium Nitrate (AR) |
|---|---|
| C.A.S. Number | 7757-79-1 |
| Product Category | Laboratory & Analytical Reagents |
| Product Group | Laboratory Salts & Reagents (AR) |
| Grade / Standard | ≥99.5% AR |
| Physical Form | White 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 | White 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 | Assay | Not less than 99.5 % w/w | 99.76 | Titrimetry / Instrumental |
| 5 | Matter Insoluble in Water | Not more than 0.01 % w/w | 0.0024 | Gravimetry |
| 6 | pH (5 % aqueous solution) | As per specification | 7.9 | Potentiometry |
| 7 | Chloride (Cl) | Not more than 0.001 % | 0.00043 | Turbidimetry |
| 8 | Sulphate (SO4) | Not more than 0.002 % | 0.00023 | Turbidimetry |
| 9 | Iron (Fe) | Not more than 5 ppm | 0.32 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 | 0.19 | Karl Fischer / Gravimetry |
This document sets out the standard specification for Potassium Nitrate (AR) 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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