Safe Storage of Chemicals Using Laboratory Glass Bottles
Safe chemical storage begins long before a bottle is placed on a laboratory shelf. The chemical must be matched with a compatible container, securely closed, correctly labelled and stored according to its hazard class.
Laboratory glass bottles are widely used for storing reagents, prepared solutions, samples and laboratory media. However, glass is not universally compatible with every chemical or process. The correct bottle depends on chemical compatibility, light sensitivity, temperature, pressure, volume and the type of closure required.
What Is the Safest Way to Store Chemicals in Glass Bottles?
The safest approach is to:
- Review the chemical’s Safety Data Sheet, or SDS.
- Confirm that the chemical is compatible with the bottle and cap.
- Select clear, amber or borosilicate glass according to the application.
- Label the bottle with the complete chemical identity and hazard information.
- Keep the bottle tightly closed when it is not in use.
- Separate incompatible chemicals.
- Use suitable secondary containment.
- Store the bottle away from heat, direct sunlight and physical damage.
- Inspect the bottle regularly for cracks, residue, leakage or cap damage.
Chemical storage should be based on hazard compatibility, not simply alphabetical order. Acids, bases, oxidisers, flammable liquids and other reactive substances may require separate storage areas or containment systems.
Why Are Glass Bottles Used for Chemical Storage?
Glass bottles are popular in laboratories because they provide good visibility, can be cleaned effectively and are suitable for many laboratory chemicals and solutions.
Borosilicate glass is particularly useful when temperature resistance and chemical durability are important. For example, the 100 ml clear autoclavable borosilicate bottle, 250 ml clear autoclavable borosilicate bottle, 500 ml clear autoclavable borosilicate bottle and 1 litre clear autoclavable borosilicate bottle available from Lab Buddy are made from Boro 3.3 glass and include screw caps and pouring rings.
These bottles are suitable for applications where chemical resistance, sterilisation and resistance to temperature changes are required, provided that the complete bottle and closure system is approved for the intended process.
Choose the Correct Type of Glass Bottle
Clear borosilicate glass bottles
Clear borosilicate bottles allow users to observe the colour, clarity, precipitation and approximate volume of a solution.
They are a practical option for:
● Preparing laboratory solutions
● Storing non-light-sensitive reagents
● Sterilising compatible laboratory media
● Holding aqueous samples
● Short-term processing and general laboratory use
The 500 ml clear autoclavable borosilicate bottle is suitable for medium-volume applications, while the 1 litre clear autoclavable borosilicate bottle can accommodate larger solution or media volumes.
Before autoclaving, laboratories must verify that the bottle, cap, pouring ring and contents are all suitable for the selected autoclave cycle.
Amber glass bottles
Some chemicals and solutions deteriorate when exposed to light. Amber glass reduces the amount of ultraviolet and visible light reaching the contents and can therefore help protect light-sensitive materials.
The 100 ml round amber glass bottle with cap is designed for storing light-sensitive chemicals, reagents, extracts and laboratory solutions.
For smaller quantities, the 50 to 60 ml amber narrow-neck reagent bottle provides a compact option for light-sensitive reagents.
Amber glass does not automatically make every chemical stable. Storage temperature, oxygen exposure, closure compatibility and the manufacturer’s SDS must also be considered.
General-purpose clear glass bottles
A 200 ml round clear glass bottle with cap can be used for compatible laboratory liquids, samples and solutions where visual inspection is useful.
General-purpose glass bottles should not be treated as interchangeable with certified borosilicate media bottles. A bottle intended for routine storage may not be suitable for heating, autoclaving, vacuum use or major temperature changes.
Small sample bottles
The 28 ml McCartney bottle with aluminium cap offers a compact format for small laboratory samples and specimen-related applications.
Before use, confirm that the cap, liner and bottle are compatible with the sample, required sterilisation process and storage conditions.
Confirm Chemical Compatibility Before Filling the Bottle
A bottle that looks sturdy may still be unsuitable for a particular chemical.
Chemical compatibility must be assessed across the complete container system:
|
Component |
What to check |
|
Bottle body |
Compatibility with the chemical, concentration and temperature |
|
Cap |
Resistance to vapour, liquid contact and repeated opening |
|
Cap liner |
Compatibility with solvents, acids, bases or oils |
|
Pouring ring |
Suitability for the chemical and sterilisation process |
|
Label |
Resistance to moisture, cold storage and chemical splashes |
|
Secondary container |
Compatibility with possible leaks or spills |
The SDS should be the first source consulted. Chemical suppliers may also provide specific storage and packaging instructions.
Where compatibility remains uncertain, obtain guidance from the chemical manufacturer, laboratory safety officer or an experienced scientific supplier such as B&M Scientific.
Label Every Chemical Bottle Clearly
Chemical labels must remain legible throughout the storage period.
A laboratory bottle label should normally include:
● Full chemical or solution name
● Concentration, where applicable
● Relevant hazard information
● Preparation or transfer date
● Expiry or review date, where applicable
● Name or initials of the responsible person
● Special storage conditions
● Reference to the relevant batch, sample or experiment
Avoid using unexplained abbreviations, molecular formulas alone or informal names that another person may not understand.
A bottle labelled “buffer”, “waste”, “sample” or “solution A” can become a small glass riddle with expensive consequences.
The US Occupational Safety and Health Administration recommends maintaining original labels and ensuring that stored hazardous chemicals carry appropriate identification and hazard warnings. Laboratories should also comply with applicable South African occupational health, safety, waste and chemical-management requirements.
Keep Bottles Properly Closed
Caps and stoppers help prevent:
● Evaporation
● Contamination
● Moisture absorption
● Vapour release
● Accidental splashing
● Changes in concentration
● Exposure to oxygen
Use a closure designed for the bottle. A cap that appears to fit may not provide an appropriate seal.
Do not leave funnels, pipettes or dispensing devices in storage bottles unless the system is specifically designed for permanent dispensing and remains safely closed.
Bottles containing chemicals that may generate gas or pressure require a chemical-specific procedure. Do not tightly seal a pressure-generating mixture in an ordinary glass bottle.
Do Not Overfill Glass Bottles
A bottle needs sufficient space for safe handling and any expected thermal expansion. Filling a bottle to its absolute maximum capacity can increase the risk of leakage, cap contamination or breakage.
The appropriate fill level depends on:
● The chemical
● Storage temperature
● Expected temperature changes
● Transport requirements
● Whether the material expands
● Whether the bottle will be sterilised or heated
Follow the bottle manufacturer’s instructions and the chemical-specific procedure rather than applying one fill rule to every substance.
Segregate Incompatible Chemicals
Chemical segregation is one of the most important storage controls.
Store chemicals according to compatible hazard groups. Separate substances that could react dangerously if one bottle leaked into another.
Laboratories should use:
● Dedicated chemical cabinets where required
● Separate trays or bins for incompatible groups
● Clearly marked storage zones
● Shelf lips or restraints
● Appropriate flammable-liquid or corrosive-storage cabinets
● Chemical-resistant secondary containment
The Stanford Environmental Health and Safety chemical storage guidance recommends determining storage groups and using compatibility information rather than relying on alphabetical organisation.
Use Secondary Containment
Secondary containment is a tray, tub, bin or other barrier placed around chemical bottles to contain leakage or breakage.
Good secondary containment should:
● Be compatible with the stored chemical
● Hold the bottles securely
● Remain stable on the shelf
● Be easy to inspect and clean
● Keep incompatible chemical groups separated
● Be large enough for the laboratory’s documented spill-containment requirements
A secondary tray is not permission to combine incompatible chemicals. It is a backup barrier, not a chemical peace treaty.
Store Glass Bottles in a Stable Location
Chemical bottles should generally be stored:
● Below eye level when they contain hazardous liquids
● Away from shelf edges
● Away from direct sunlight
● Away from heat sources
● In a cool, stable environment where required
● Inside an appropriate cabinet when specified
● Away from sinks, drains and busy walkways
● In areas protected from impact and vibration
Avoid storing heavy or hazardous glass bottles on high shelves. Shelves must be strong, chemically resistant and fitted with suitable restraints where necessary.
Inspect Bottles and Storage Areas Regularly
A regular inspection should identify:
● Cracks, chips or scratches
● Clouding or surface damage
● Leaking caps
● Crystallisation around the closure
● Corroded or damaged caps
● Faded or missing labels
● Chemical residue on the bottle
● Bulging, pressure or unexpected gas formation
● Expired or unneeded chemicals
● Incompatible chemicals stored together
● Damaged secondary containment
Do not handle a swollen, pressurised, badly corroded or visibly unstable container without an approved safety procedure.
Can Every Chemical Be Stored in Glass?
No. Glass is suitable for many laboratory chemicals, but not for every substance or operating condition.
Some chemicals require plastic, metal or specialised coated containers. The correct choice depends on the chemical’s composition, concentration, temperature, purity requirements and storage duration.
The chemical’s SDS and supplier instructions take priority over general recommendations.
Lab Buddy also supplies plastic laboratory bottles, including the 125 ml wide-neck plastic reagent bottle, 250 ml wide-neck plastic reagent bottle and 1 litre wide-neck plastic reagent bottle for compatible applications.
Frequently Asked Questions
Are amber glass bottles safer than clear glass bottles?
Amber bottles are more appropriate for many light-sensitive materials because they reduce exposure to light. They are not automatically safer for chemicals that are incompatible with glass or with the selected closure.
Can laboratory glass bottles be autoclaved?
Only bottles and closure systems rated for autoclaving should be used. The Lab Buddy Boro 3.3 autoclavable bottle range includes bottles intended for autoclaving and dry sterilisation, but laboratories must still follow the product instructions and their validated sterilisation procedure.
Can an old chemical bottle be reused?
Reusing a bottle requires a formal assessment of its condition, previous contents, cleanliness, compatibility and closure integrity. Original labels must be completely removed or defaced before the bottle is relabelled. Never reuse a damaged or contaminated bottle.
Should chemicals be arranged alphabetically?
Not as the primary storage method. Chemicals should first be divided into compatible hazard groups. Alphabetical organisation may then be used within a compatible group where appropriate.
Why is secondary containment important?
Secondary containment helps control leaks, spills and broken bottles. Separate containment also reduces the chance that incompatible chemicals will mix during an incident.
Source Laboratory Bottles for Your Application
Choosing the right storage bottle protects personnel, preserves chemical quality and supports reliable laboratory results.
Lab Buddy offers glass and plastic laboratory bottles for routine storage, light-sensitive reagents, sterilisation, sample handling and specialised laboratory applications. Laboratories requiring additional assistance can also consult B&M Scientific for laboratory equipment, glassware, consumables and chemical-storage solutions.
Always review the chemical’s SDS, your laboratory’s chemical hygiene procedures and the bottle manufacturer’s instructions before storing hazardous substances.