What Belongs on a Laboratory Solution Label?
Let the label identify one record
A solution label should help a colleague identify the actual container and retrieve its full history. Begin with a unique identifier and an unambiguous material description. A familiar nickname may work within one project but fail when the container moves to a shared facility or another researcher inherits the study.
Plan what remains on the physical label and what belongs in the linked record. The latter can contain source batch references, the applicable preparation procedure, operator details, calculations, instrument references and review status. A barcode can speed retrieval, but retain enough readable information to recognise the container when the scanner is unavailable.
Make quantity language explicit
If a concentration appears, give its quantity type and unit clearly, with the relevant basis available in the record. Do not assume that a bare number means mass concentration rather than amount concentration. NIST’s SI guidance explains why different quantities described as concentration need to be distinguished.
An illustrative label entry is: “SOL-028; material X; assigned concentration: see approved record PR-028; prepared 12 March 2027; reviewer pending.” This is a documentation example, not a preparation instruction. The wording should never suggest that an unreviewed calculation has already been analytically confirmed.
Keep dates and hazards meaningful
Name each date field: prepared, first opened, expiry or internal review. A date printed without a label can become misleading over time. Any assigned use period needs its documented basis and approval; the act of printing an expiry field does not establish stability.
Include the hazard information required by the applicable laboratory arrangements and assessment. HSE’s labelling and packaging guidance explains chemical hazard communication in its relevant supply context. An internal identification sticker should not obscure original hazard information or be mistaken for a complete substitute for the workplace risk assessment.
Check the label in its working setting
Test readability, adhesion and retrieval under the intended laboratory conditions before adopting a label format. Document replacement labels so an identifier is not accidentally reassigned. For shared UK facilities, agree consistent date formats and a readable link to the responsible group.
The research information hub provides context for sound laboratory evidence. In daily work, the label’s success is straightforward: a colleague can identify the container, understand its status and locate the complete approved record without guessing what an abbreviation, number or date means.
Related research reading
- Keeping Mass, Volume and Concentration Units Distinct
- Aliquot Planning: Traceability Before Convenience
Explore the research blog and original batch-document library for further context.