Laboratory guides
Vial labels and batch traceability
The lot links material and documentation; a preparation identifier distinguishes what you did with it. Retain both to trace a result back to its source container without depending on memory or location.
Source editorial review:
One identifier per function
Distinguish product or SKU, supplier lot and internal identifier. The first locates an offering, the second links the supplier’s declared grouping and the third organizes laboratory work. None automatically replaces the others or independently guarantees chemical identity.
Case: one stock preparation produces six tubes
Each tube needs its own identity linked to the stock preparation, which retains the source-lot relationship. The record should support both directions: from a result to its material, and from the material to preparations that may require review.
When transcribing an identifier, retain the original document and verify the reading. Changing hyphens, zeros or letters to make a certificate “match” defeats the purpose of the cross-check.
Design for the next operator
Check readability under actual storage and use conditions. The label must allow the preparation’s complete composition and hazards to be located in the record, as well as identify it. A QR code helps only while its destination remains available and matches the correct container.
A record for this decision
Can the container’s history be reconstructed without relying on memory?
| Field | What to document |
|---|---|
| Identity | Complete name, variant and originating material batch. |
| Relationship | Own identifier and link to the previous preparation or transfer. |
| Record | Date, operator, condition and corresponding document. |
When to leave the decision open
Segregate material when an identifier is lost. Box position, content color or a similar name do not reconstruct reliable identity.
Questions and answers
Is a lot number a certification?
No. It is an identifier used to find and link documentation. The content and scope of that documentation require separate verification.
Must a small label contain the entire dossier?
The label must identify the container and allow retrieval of the complete record, while meeting the applicable safety procedure.