Certificate of Analysis and technical specification for Congo Red — CAS 573-58-0. Applies to all consignments of this product and grade.
| Product Name | Congo Red |
|---|---|
| C.A.S. Number | 573-58-0 |
| Product Category | Laboratory & Analytical Reagents |
| Product Group | pH Indicators |
| Grade / Standard | Indicator/Stain grade |
| Physical Form | Red-brown 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 | Red-brown 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 0.01 % w/w | 0.0029 | Gravimetry |
| 5 | pH (5 % aqueous solution) | As per specification | 8.5 | Potentiometry |
| 6 | Chloride (Cl) | Not more than 0.001 % | 0.00041 | Turbidimetry |
| 7 | Sulphate (SO4) | Not more than 0.002 % | 0.00065 | Turbidimetry |
| 8 | Iron (Fe) | Not more than 5 ppm | 1.85 ppm | ICP-OES |
| 9 | Heavy Metals (as Pb) | Not more than 5 ppm | Less than 2 ppm | ICP-OES |
| 10 | Moisture | Not more than 1.0 % w/w | 0.47 | Karl Fischer / Gravimetry |
This document sets out the standard specification for Congo Red 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.
Send the specification you work to — we confirm the grade, packing, documentation set and CIF/FOB price within one business day.
