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Maximum limits and measured results for heavy metals, trace elements, or water content.
For industries regulated by GMP (Good Manufacturing Practices) or ISO 17025, using a reagent without its corresponding, updated COA is a non-conformance. During an audit, regulators will trace the COA of every chemical used in a QC test. If the COA on file is for an older batch or an outdated revision, the entire analytical result can be questioned. For Unichem’s customers, therefore, checking the COA update status is a frontline defense against contamination, inaccurate potency, or hidden impurities. unichem chemical reagents certificate of analysis upd
A common mistake is using an outdated COA from a previous batch for a new bottle of the same reagent. Because chemical purity can vary between syntheses, Laboratories that fail to verify the COA update date risk using a reagent that fails to meet their application’s requirements—potentially invalidating months of research or violating an FDA audit trail. Maximum limits and measured results for heavy metals,
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "No UPD record found" | The batch number was mistyped (e.g., 0 vs O). | Double-check the lot number under magnification. Use the barcode scanner. | | "Document under revision" | Unichem is actively updating the COA due to a method change. | Wait 2 hours and refresh. The will be available. Do not use the reagent until the final COA is live. | | "Access denied – Region locked" | UPD compliance varies by country due to data export laws. | Contact your local Unichem distributor. They will provide a region-specific UPD proxy. | | "Legacy lot – No digital UPD" | The reagent was made before 2020. | Request a "Legacy Verification Letter" (LVL) from Unichem QA. This serves as an equivalent document. | If the COA on file is for an
Detailed results for trace metals, moisture content, or secondary compounds.
Unlike some larger aggregators, Unichem typically provides batch-specific documentation through direct request or specialized portal access: Contact Customer Service
: A unique code (usually near the expiration date) used to track that specific production run. Datacor, Inc. What is included in a Unichem COA?
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