| 1 | Chemical Identity | The material should be identified as glucosamine sulfate 2KCl, commonly referenced by CAS No. 23031-25-6. | Current specification sheet, certificate of analysis, infrared identification test, and batch-specific analytical report. | Confirms that the supplied material matches the requested salt form rather than another glucosamine derivative. |
| 2 | Assay and Purity | Use a clearly defined assay range in the purchase specification; many commercial specifications use a target close to 98%–102%, depending on the test method and basis. | Validated HPLC or titration method, batch COA, method description, and independent laboratory confirmation for initial qualification. | Reduces formulation variation and supports accurate label declaration. |
| 3 | Sulfate and Chloride Balance | Sulfate and chloride should be controlled according to the approved product specification for the 2KCl salt form. | Ion chromatography, titration, or other validated test results showing batch conformity. | Helps verify salt composition, stability, and consistency between production lots. |
| 4 | Moisture and Physical Form | Moisture limit, appearance, color, odor, particle size, and bulk density should be specified before ordering. | Loss-on-drying or water-content results, product photographs, sieve analysis, and packaging-condition records. | Supports smooth blending, capsule or tablet processing, storage stability, and predictable filling performance. |
| 5 | Heavy Metals and Elemental Impurities | The supplier should meet the limits required by the destination market and the buyer’s applicable food, supplement, or pharmaceutical standard. | ICP-MS or ICP-OES report covering lead, arsenic, cadmium, mercury, and other relevant elements. | Protects consumer safety and reduces the risk of import or regulatory rejection. |
| 6 | Microbiological Quality | Total aerobic microbial count, yeast and mold, and specified pathogens should be controlled against the destination-market requirement. | Batch microbiology report, sampling plan, pathogen testing records, and sanitation-control procedures. | Important for products intended for oral consumption and for meeting finished-product quality requirements. |
| 7 | Manufacturing Quality System | Prefer facilities operating under a documented quality system with controlled production, deviation handling, corrective actions, and change control. | Quality-system certificate, audit report, site questionnaire, process flow chart, and recent inspection records. | Indicates whether the supplier can maintain consistent quality beyond a single successful sample. |
| 8 | Traceability and Batch Control | Each shipment should have a unique lot number linked to raw materials, production dates, test results, packaging records, and release approval. | Example batch record, traceability procedure, retention-sample policy, and recall or complaint-handling procedure. | Enables rapid investigation and controlled response if a quality issue occurs. |
| 9 | Packaging and Storage | Packaging should protect the hygroscopic powder from moisture and contamination; storage conditions and shelf life must be clearly stated. | Packaging specification, inner-bag material, outer-container details, storage statement, shelf-life data, and transport recommendations. | Helps preserve assay, flowability, appearance, and microbiological quality during international transportation. |
| 10 | Export and Commercial Capability | The supplier should provide consistent lead times, minimum-order information, sample support, export documents, and clear Incoterms. | Pro forma invoice, commercial invoice, packing list, certificate of origin, shipping history, sample policy, and written quotation validity. | Improves landed-cost planning and reduces delays during customs clearance and replenishment. |