By Donal O’Sullivan, BSc. Reviewed by Michael Anderson, MBA.

 

A laboratory bottle label should provide enough information to identify the container and its contents clearly at the point of use. Where traceability matters, the physical label may also need to connect the bottle to associated records such as preparation, batch, lot or other controlled information. The important question is not whether every laboratory bottle should carry the same set of fields. It is whether the information recorded is sufficient for the laboratory's intended identification and traceability needs. A proportionate approach separates information that needs to be immediately visible on the bottle from information that can be maintained in an associated record.

 

Key Takeaways

• A bottle label should make the container and its contents identifiable without relying on guesswork.
• The information required depends on the laboratory workflow; there is no single universal label for every bottle.
• Dates, batch or lot information, preparation details and other fields should be recorded where they are relevant to the material and process.
• A physical label and an associated record can work together; not every piece of traceability information needs to fit on the bottle itself.
• Consistent identifiers help connect a physical bottle to supporting records.
• Relabelling or transferring material should not break the traceability chain.
• Labels need to remain readable and associated with the correct container throughout the relevant period of use.
• Labelling supports traceability but does not replace the laboratory's own controlled procedures.

Why Do Laboratory Bottle Labelling and Traceability Matter?

Laboratories often have multiple bottles containing similar materials, prepared solutions, reagents or samples. If the identification on one bottle is unclear, incomplete or no longer matches the associated record, it can become difficult to establish what the container holds and how it should be handled.

Good labelling therefore supports more than simple identification.

It can help a laboratory:

• distinguish similar containers;
• connect a bottle to its preparation or source information;
• identify relevant dates;
• establish batch or lot relationships where required;
• maintain controlled status information;
• investigate unexpected results or discrepancies;
• reduce ambiguity when material is transferred between locations; and
• maintain consistent records across repeat workflows.

The level of information needed depends on the laboratory's process.

A bottle containing a commercially supplied reagent may require different information from a bottle containing a laboratory-prepared solution or a sample collected for analysis.

The objective is to record enough information to maintain reliable identification and traceability without creating unnecessary or unmanageable labelling requirements.

What Information Should a Laboratory Bottle Label Contain?

The label should contain the information needed to identify the bottle and its contents clearly at the point where the container is being used.

Depending on the application, this may include:

Information	Why it may be needed
Contents or material identification	Establishes what the bottle contains or represents
Unique identifier	Connects the physical bottle with an associated record where required
Preparation or receipt date	Establishes when relevant material entered the controlled workflow
Expiry or use-by information	Helps identify the period during which the material is intended to remain suitable for use
Batch or lot information	Supports source traceability where relevant
Responsible person or area	Can identify ownership or responsibility where required
Status	Can distinguish approved, pending, quarantined or other controlled states where applicable
Storage or handling information	May be needed where particular conditions are important to the workflow

Not every field belongs on every physical label.

The laboratory should determine which information needs to be immediately visible and which can be maintained in an associated record.

Where a bottle contains a hazardous substance or preparation, any required hazard identification and handling information should also be addressed through the laboratory's applicable procedures and regulatory requirements. Hazard communication is a separate control from general bottle traceability and should not be assumed to be satisfied by a unique identifier or material name alone.

Identification and Traceability Are Not the Same Thing

A label identifies a container and, where appropriate, identifies the material or sample associated with it. Traceability establishes a reliable connection between that physical container and the information needed to understand its identity, source, preparation, status or history.

For example, a bottle may carry a unique container or preparation identifier, while the associated record contains:

• preparation details;
• source material;
• batch or lot information;
• preparation date;
• responsible person;
• relevant supporting documentation; or
• other controlled information.

This approach can be preferable to placing every possible field on the physical label.

The important requirement is that the relationship between the bottle and the associated record remains clear.

If a person cannot reliably determine which record belongs to a particular bottle, the presence of a label alone does not provide effective traceability.

What Should Be Recorded in the Associated Record?

The associated record should contain information that is necessary for the laboratory's workflow but does not need to appear in full on the physical bottle.

Depending on the application, this can include:

• the full material or sample description;
• source or supplier information;
• manufacturer and product reference;
• batch or lot information;
• preparation instructions or record of preparation;
• preparation date;
• responsible person;
• relevant review or approval information;
• storage location;
• associated test or sample reference;
• supporting documentation; and
• status or disposition information.

The precise requirements should come from the laboratory's own procedures and the nature of the material.

The aim is to create a reliable connection between the bottle that is physically handled and the information that explains its identity and history.

Core Information Versus Application-Specific Information

A useful way to design a labelling system is to distinguish information that is broadly useful from information that depends on the particular workflow.

Core identification information

Most controlled laboratory workflows need some way of identifying:

• what the container contains or represents; and
• which record, reference or other identifier belongs to it where traceability requires that connection.

Application-specific information

Additional information may be required depending on the material or process, such as:

• preparation date;
• expiry or use-by date;
• batch or lot;
• concentration;
• status;
• storage condition;
• sample reference;
• responsible person; or
• another method- or procedure-specific identifier.

The laboratory should avoid adding fields simply because they appear useful in theory.

Every additional field creates another opportunity for inconsistent recording, outdated information or transcription errors.

A better approach is to identify the information that the workflow actually needs and make those requirements consistent.

Prepared Solutions and Reagents

Bottles containing laboratory-prepared solutions may require more information than unopened commercial products because the laboratory may need to establish how and when the material was prepared.

Depending on the procedure, relevant information may include:

• solution or reagent identification;
• concentration where applicable;
• preparation date;
• expiry or review date where applicable;
• preparation or batch reference;
• responsible person; and
• associated preparation record.

The precise fields should be determined by the laboratory's procedure and the nature of the material.

Do not assume that every prepared solution requires the same label information.

The important principle is that the physical container should be identifiable and, where necessary, linked to the information required to understand its preparation and status.

Sample Bottles and Analytical Traceability

Sample bottles can have different traceability requirements from reagent or storage bottles.

For a sample workflow, the identifier may need to connect the physical container with information such as:

• sample reference;
• collection information;
• source;
• relevant date or time;
• associated project or test reference; and
• other information required by the laboratory's sampling procedure.

The exact requirements depend on the sampling and testing process.

This article does not establish a universal sample chain-of-custody procedure. Where a laboratory has a controlled sampling or chain-of-custody process, the bottle label and associated records should follow that established procedure.

Batch and Lot Information

Batch or lot information can be important when the laboratory needs to trace material back to its source.

For example, a bottle containing a commercial reagent may need to retain the manufacturer's batch or lot reference in the laboratory record even if the full information is not practical to display prominently on the physical label.

Where batch or lot information is relevant, the laboratory should ensure that it can be connected reliably to the correct bottle.

This is particularly important where multiple bottles contain similar materials from different batches.

The requirement should remain proportionate to the workflow rather than treating batch or lot recording as mandatory for every laboratory bottle.

Dates Need to Be Clearly Defined

Dates can have different meanings, so labels should avoid ambiguous date fields where the distinction matters.

Depending on the workflow, a date may represent:

• preparation;
• receipt;
• opening;
• expiry;
• review; or
• another controlled event.

For example, a preparation date should not automatically be interpreted as an expiry or use-by date. Where an expiry or use-by date is required, its basis should come from the applicable manufacturer information, validated stability information, analytical method or controlled laboratory procedure rather than being inferred from the preparation date alone.

Where more than one date is relevant, the label or associated record should make the meaning clear.

The laboratory's procedure should determine which dates need to be recorded and how they should be represented.

What About Bottle Status?

Some workflows require the laboratory to distinguish between different container or material statuses.

Examples can include:

• pending;
• approved;
• quarantined;
• rejected;
• expired; or
• awaiting review.

Where status information is used, it should be clear what the status means and how it is controlled.

A status marking that can be changed without a corresponding record or procedure may create confusion rather than reduce it.

Status information should therefore be part of the laboratory's controlled process rather than an informal labelling convention.

Keep Labels Readable and Associated With the Correct Bottle

A technically complete label is not useful if it cannot be read or if it becomes detached from the container.

Consider the actual conditions under which the bottle will be:

• stored;
• handled;
• transported;
• refrigerated;
• frozen;
• exposed to moisture;
• cleaned; or
• otherwise processed.

The label format and attachment method should be appropriate for the intended conditions.

The laboratory should also consider whether the information remains readable throughout the period in which it is needed.

Where bottles are moved between locations, the identification should remain associated with the correct container.

The objective is not simply to create a label once. It is to maintain reliable identification throughout the relevant workflow.

Avoid Ambiguous Labelling

A common source of confusion is using abbreviations, informal names or local terminology that different people may interpret differently.

A controlled labelling approach should therefore consider:

• consistent names;
• agreed abbreviations where abbreviations are necessary;
• clear identifiers;
• consistent date formats;
• legible presentation; and
• terminology that matches the laboratory's records.

For example, a short abbreviation may be obvious to the person who prepared the bottle but unclear to another member of the team several days later.

The best label is not necessarily the longest one. It is the one that communicates the required information clearly and consistently to the people who need to use it.

What Happens When a Bottle Is Relabelled?

Relabelling can create a traceability risk if the new label no longer connects clearly with the original identity or associated record.

Before relabelling, the laboratory should establish:

• why the bottle is being relabelled;
• which identity needs to be retained;
• whether the original identifier must remain traceable;
• whether the associated record needs to be updated; and
• who is authorised to make the change.

A new label should not simply overwrite important information if doing so breaks the history of the container or material.

The appropriate process depends on the laboratory's procedures.

Where the material itself has changed status, ownership or identity, the associated records should reflect that change rather than relying solely on a replacement label.

Transferring Material Between Bottles

Moving material from one bottle to another can also affect traceability.

The laboratory should be able to establish which new container corresponds to the original material and which information needs to be transferred or retained.

Depending on the workflow, this may require:

• retaining the original material identifier;
• assigning a new container identifier;
• recording the transfer;
• recording the date;
• identifying the person responsible; or
• updating the associated record.

The exact requirements depend on the laboratory procedure.

The important principle is that a physical transfer should not unintentionally sever the relationship between the material and its relevant records.

A Practical Bottle Labelling and Traceability Framework

A simple framework can help laboratories determine what information should be recorded.

1. Identify the container or contents

Establish what the bottle contains or represents.

2. Determine whether a unique identifier is needed

If the workflow requires a reliable connection to another record, assign an identifier that can distinguish the container or material appropriately.

3. Identify the additional information required

Determine whether dates, batch or lot information, status, responsible person, storage information or other fields are needed.

4. Decide what belongs on the physical label

Place the information that needs to be visible at the point of use on the bottle.

5. Decide what belongs in the associated record

Maintain supporting information that does not need to appear in full on the physical container.

6. Establish how changes will be controlled

Define what happens when a bottle is relabelled, transferred, expires or changes status.

7. Check that the system remains usable

Confirm that labels remain readable and that the physical bottle can still be connected reliably to its associated record.

This framework should be adapted to the laboratory's actual procedures rather than adopted as a universal label specification.

Laboratory Bottle Labelling and Traceability Checklist

Check	Question
Contents identified	Can the bottle's contents or purpose be identified clearly?
Unique identifier	Does the workflow require a unique identifier linking the bottle to an associated record?
Dates	Are relevant dates recorded and clearly defined?
Batch / lot	Is batch or lot information required for the material or workflow?
Status	Is any controlled status information required?
Associated record	Can the physical bottle be reliably connected to its supporting record?
Prepared material	Are preparation details recorded where required?
Sample information	Are relevant sample references recorded where applicable?
Readability	Will the label remain readable under the intended conditions?
Relabelling	Is there a controlled process for replacing or updating labels?
Transfers	Can traceability be maintained if material moves to another bottle?
Procedure alignment	Does the labelling approach match the laboratory's established procedure?

If a critical identification or traceability requirement cannot be established, resolve it through the laboratory's controlled process rather than relying on an informal labelling convention.

Common Labelling and Traceability Mistakes

Putting everything on the physical label

More information is not automatically better.

Better approach: keep essential identification information on the bottle and maintain supporting detail in the associated record where appropriate.

Using an identifier without a reliable record

A unique number is of limited value if the laboratory cannot determine what record it refers to.

Better approach: make sure the identifier connects reliably to the relevant information.

Using ambiguous dates

A date without a defined meaning can create confusion.

Better approach: identify whether the date represents preparation, receipt, opening, expiry, review or another event.

Assuming batch or lot information is always required

The need for batch or lot information depends on the material and workflow.

Better approach: record it where it contributes to the required traceability.

Overwriting information during relabelling

Replacing a label can unintentionally remove useful history.

Better approach: follow a controlled relabelling process that preserves the required traceability.

Using informal abbreviations

An abbreviation that is obvious to one person may be unclear to another.

Better approach: use consistent terminology and agreed abbreviations where appropriate.

Allowing labels to become unreadable

A correct label does not provide reliable identification if it cannot be read.

Better approach: consider the actual storage and handling conditions when establishing the labelling method.

Treating labelling as a substitute for procedure

A label cannot compensate for an uncontrolled underlying process.

Better approach: make bottle identification part of the laboratory's established procedures for preparation, storage, sampling or material control.

Frequently Asked Questions

What information should be included on a laboratory bottle label?

A laboratory bottle label should include enough information to identify the container and its contents clearly at the point of use. Depending on the workflow, this may include a unique identifier, relevant dates, batch or lot information, status or other application-specific information. The exact fields should be determined by the laboratory's procedure and traceability requirements.

Does every laboratory bottle need a unique identifier?

No. A unique identifier is most useful where the workflow requires the physical bottle to be connected reliably to an associated record or where similar containers need to be distinguished. The laboratory should determine whether a unique identifier is necessary for the particular application.

Should batch or lot information be recorded on laboratory bottle labels?

Batch or lot information should be recorded where it is relevant to the laboratory's traceability requirements. It may be appropriate to place the information on the physical label or maintain it in an associated record, depending on the workflow. It should remain reliably connected to the correct bottle.

Should expiry or preparation dates be recorded on laboratory bottles?

Relevant expiry or preparation dates should be recorded when they are needed to control the material or workflow. The meaning of each date should be clear because preparation, receipt, opening, expiry and review dates are not interchangeable.

What is the difference between bottle labelling and traceability?

Bottle labelling provides information that identifies a physical container, while traceability connects that container to the associated information needed to understand its identity, source, preparation, status or history. Effective traceability may therefore require both a physical label and an associated record.

What should a laboratory do when a bottle is relabelled or transferred?

The laboratory should follow its controlled procedure for relabelling or transferring material and ensure that the required connection between the physical bottle and its associated records is maintained. Where necessary, retain the original identifier or record the transfer so that the material's relevant history is not lost.

Choosing Laboratory Bottles With Traceability in Mind

Labelling and traceability should be considered alongside the wider bottle specification.

Once the laboratory has established what the container needs to hold, how it will be used and what information needs to remain associated with it, the bottle itself can be selected against those requirements.

For broader guidance on laboratory bottle selection, see Laboratory Bottles: Selection Guide for UK Laboratories.

When you are ready to review available bottle options, browse Laboratory Glassware.

Read More

• Laboratory Bottles: Selection Guide for UK Laboratories

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• Browse Laboratory Bottles and Glassware

 

Written by: Donal O’Sullivan, BSc, Co-Founder and Sales Director, LabFriend UK. Donal brings deep chemistry-led technical expertise across analytical chemistry, biochemistry, environmental monitoring, laboratory instrumentation, consumables and scientific product selection.

Reviewed by: Michael Anderson, MBA, Founder and Managing Director, LabFriend UK. Michael reviews LabFriend UK content for customer relevance, commercial accuracy, operational practicality and alignment with LabFriend UK’s laboratory supply model.