Chemical storage areas are found in many UK workplaces, from warehouses and factories to laboratories, workshops, schools and commercial cleaning facilities.

These areas may contain flammable liquids, corrosive substances, toxic chemicals, gases or other hazardous materials.

Displaying suitable chemical storage area signs helps employees, contractors and visitors recognise relevant hazards before entering or approaching the storage area.

But which signs should be displayed? Does every chemical cupboard need a warning? And should you use a Chemical Hazard Sign, a Flammable Material Sign or a COSHH-related notice?

The answer depends on the chemicals being stored, the risks they present and the measures already in place.

In this guide, we'll look at common chemical storage signs, where they may be needed and how to choose suitable warnings for your workplace.

Why Are Chemical Storage Area Signs Important?

Chemical storage areas may contain substances capable of causing injury, ill health, fire or other dangerous incidents.

Potential hazards include:

• Flammable liquids and vapours.

• Corrosive acids and alkalis.

• Toxic or harmful substances.

• Oxidising materials.

• Gases under pressure.

• Chemicals that react dangerously when mixed.

• Harmful fumes or vapours.

Clear signage can help communicate these risks and identify precautions that people may need to follow.

For example, a Flammable Material Sign can warn people approaching a storage area containing flammable substances.

A Corrosive Warning Sign may be more appropriate for an area used to store corrosive chemicals.

However, warning signs are only one part of chemical safety. They should support suitable storage arrangements, risk assessments, training and other necessary controls.

1. General Chemical Hazard Signs

A Chemical Hazard Sign provides a general warning that hazardous chemicals or substances may be present.

These signs can be useful where a storage area contains chemical-related hazards that need to be communicated.

Common Locations

• Chemical storage rooms.

• Industrial storage areas.

• Laboratory chemical stores.

• Designated chemical handling areas.

• Relevant workshop storage locations.

When Should You Choose a General Warning?

A general warning may be appropriate where it accurately communicates the hazard and meets the relevant signage requirements.

However, where a more specific warning is needed, a general Chemical Hazard Sign may not provide enough information.

Buying tip: Identify the substances and risks before choosing the sign. A specific Corrosive or Flammable Warning Sign may be clearer than a general chemical warning.

2. Flammable Material Warning Signs

Flammable substances can present fire and explosion risks under certain conditions.

Relevant storage areas may contain:

• Solvents.

• Fuels.

• Flammable paints.

• Certain cleaning chemicals.

• Flammable gases.

• Other flammable liquids or materials.

A Flammable Material Warning Sign can alert people to the presence of these hazards.

Where Might Flammable Signs Be Displayed?

• Flammable liquid storage rooms.

• Relevant chemical cabinets.

• Industrial storage areas.

• Designated solvent stores.

• Suitable approaches to hazardous storage zones.

What Other Signs Might Be Needed?

Depending on the circumstances, a flammable storage area may also require:

• No Smoking Signs.

• No Naked Flames Signs.

• Restricted Access Notices.

• Relevant emergency information.

The appropriate precautions should be identified through the relevant fire risk assessment and, where applicable, a DSEAR assessment.

A Flammable Material Sign does not replace safe storage, ventilation, ignition-source controls or other necessary precautions.

3. Corrosive Substance Warning Signs

Corrosive substances may cause serious injury through contact with skin or eyes and can damage certain materials.

Examples include some acids and alkalis.

A Corrosive Substance Warning Sign may be suitable for areas where corrosive chemicals are stored or handled.

Typical Applications

• Acid storage cupboards.

• Industrial chemical stores.

• Battery maintenance areas.

• Laboratories.

• Relevant cleaning chemical stores.

Should You Use an Acid Warning Sign Instead?

If the specific hazard is an acid, an Acid Warning Sign may communicate that information more directly.

A general Corrosive Warning Sign may be appropriate where the storage area contains different corrosive substances.

Choose wording that accurately reflects the hazards present.

4. Toxic & Harmful Substance Signs

Some chemicals can cause harm through inhalation, ingestion, skin contact or other exposure routes.

The appropriate warning depends on the substance and its classification.

A Toxic Material Warning Sign may be suitable where a toxic hazard needs to be communicated.

Other chemical storage areas may require different warnings for harmful substances or fumes.

Common Applications

• Laboratory chemical stores.

• Industrial chemical storage rooms.

• Relevant manufacturing facilities.

• Designated hazardous substance storage areas.

Buying tip: Do not assume that every substance classified as harmful requires the same warning as a substance classified as acutely toxic.

Check the chemical's hazard classification, safety data sheet and relevant assessment before choosing signage.

5. Oxidising Material Warning Signs

Oxidising substances can contribute to or intensify fires.

Where these materials are stored, an Oxidising Material Warning Sign may be appropriate.

The presence of oxidising substances can also affect storage arrangements, including the need to separate incompatible chemicals.

A warning sign should support appropriate segregation and other precautions rather than replace them.

6. Gas Cylinder & Compressed Gas Signs

Some chemical storage areas contain gas cylinders or other pressurised containers.

These can present hazards associated with pressure, leaks, fire or the properties of the gas itself.

Depending on the substances present, relevant warnings may include:

• Gas Under Pressure.

• Flammable Gas.

• Toxic Gas.

• Other appropriate hazard notices.

A gas cylinder store may require several different precautions.

For example, the risks associated with oxygen storage differ from those associated with a flammable gas.

Choose signs based on the gases present and the relevant assessment.

7. No Smoking & No Naked Flames Signs

Chemical storage areas containing flammable substances may need clear prohibition signs.

Common examples include:

• No Smoking.

• No Naked Flames.

• No Ignition Sources, where an appropriate notice is needed.

These signs communicate actions that are prohibited because they could create additional risks.

Where Should Prohibition Signs Be Displayed?

They should be visible at relevant approaches and locations where the prohibition applies.

For example, a No Smoking Sign may be positioned at the entrance to a flammable chemical store.

The correct combination of signs depends on the actual risks and applicable requirements.

8. Mandatory PPE Signs

Some chemical storage or handling activities may require personal protective equipment.

Depending on the assessment, relevant signs could include:

• Eye Protection Must Be Worn.

• Protective Gloves Must Be Worn.

• Protective Clothing Must Be Worn.

• Suitable Respiratory Protection Must Be Worn.

Does Every Chemical Store Need PPE Signs?

No.

PPE requirements depend on the chemicals, tasks and exposure risks.

For example, the precautions required for transferring corrosive chemicals may differ from those needed when simply accessing a properly managed storage area.

Mandatory PPE signs should reflect the protective measures identified for the activity.

9. Emergency & First Aid Signs

Some chemical storage areas may also need signs identifying emergency equipment or escape arrangements.

Depending on the hazards and facilities provided, these could include:

• Emergency Eyewash.

• Emergency Shower.

• First Aid.

• Fire Exit.

• Fire Extinguisher Identification.

• Emergency Contact Information.

Where Should Emergency Signs Be Displayed?

Signs should help people locate relevant equipment and facilities quickly.

For example, an Emergency Eyewash Sign may be appropriate where an eyewash station has been provided.

The need for particular emergency equipment depends on the substances, activities and relevant assessment.

Do not assume that installing a sign removes the need to provide suitable emergency arrangements.

Which Signs Does Your Chemical Storage Area Need?

Different chemical stores may require different combinations of signs.

The following table provides practical examples.

Important: This is a buying guide, not a universal legal checklist. The actual signs required depend on the substances, quantities, storage arrangements and applicable safety requirements.

Chemical Storage Room Signs vs Chemical Container Labels

One common source of confusion is the difference between workplace warning signs and chemical product hazard labels.

They serve related but different purposes.

Workplace Chemical Warning Signs

Workplace warnings commonly use recognised yellow triangular symbols with black pictograms.

These are used to communicate hazards associated with an area or activity.

GHS/CLP Chemical Hazard Labels

Chemical product labels use red-bordered diamond pictograms under the applicable classification and labelling framework.

These communicate classified hazards associated with the chemical product.

Can Red Diamond Symbols Be Used on Storage Areas?

In some circumstances, yes.

UK workplace safety sign guidance includes specific provisions for areas, rooms and enclosures used to store significant quantities of hazardous substances.

Appropriate workplace warning signs are generally used where a suitable equivalent exists. Where there is no equivalent warning sign, relevant CLP pictograms may be used.

This means the correct format depends on the hazard and the applicable requirements.

A warning sign on a storage room does not replace any required labelling on the chemical containers inside.

What Signs Should Be Displayed on a Chemical Storage Cupboard?

Chemical cupboards are common in laboratories, workshops, schools and cleaning areas.

The correct signs depend on what is stored inside.

Example 1: Corrosive Chemical Cupboard

A cupboard storing corrosive chemicals may need a Corrosive Substance Warning.

Example 2: Flammable Liquid Cabinet

A cabinet containing flammable liquids may require a Flammable Material Warning and relevant prohibition notices.

Example 3: General Cleaning Cupboard

A cleaning cupboard may contain products with different classifications.

Not every cleaning cupboard automatically needs the same chemical warning.

Review the substances, quantities, access arrangements and relevant risks before deciding.

Should Every Cupboard Have a Chemical Hazard Sticker?

No.

A generic sticker isn't automatically required or sufficient for every cupboard.

Choose warnings that reflect the actual hazards and applicable requirements.

Where Should Chemical Storage Signs Be Displayed?

Position signs where people can recognise the relevant hazards before entering or approaching the area.

Common Locations

• Storage room doors.

• Chemical cabinet exteriors.

• Entrances to designated storage zones.

• Relevant industrial access points.

• Laboratory storage areas.

• Appropriate approaches to gas stores.

Avoid Common Placement Problems

Check that signs are not:

• Hidden behind open doors.

• Obscured by stored materials.

• Positioned too far from the relevant hazard.

• Too small for the viewing distance.

• Damaged or difficult to read.

If a storage area has multiple entrances, each relevant approach may need suitable warnings.

Choosing the Right Sign Size & Material

Once you've identified the signs needed, consider where they'll be installed.

Self-Adhesive Vinyl Signs

Self-adhesive signs may be suitable for compatible smooth, clean surfaces such as cupboard doors and panels.

Rigid Plastic Signs

Rigid signs may be preferable for walls, storage room entrances and other locations where a mounted board is needed.

Outdoor Chemical Storage Signs

Outdoor stores may require materials and fixings suitable for weather exposure.

Check the individual product specification before ordering.

What Size Should You Buy?

Consider:

• Viewing distance.

• Mounting position.

• Lighting.

• Available space.

• Symbol and wording legibility.

• Whether the warning is intended for close-range or more distant viewing.

A small cupboard label and a sign at the entrance to a large industrial chemical store may require different sizes.

Are Chemical Storage Area Signs Required by UK Law?

UK businesses have responsibilities to assess and manage chemical-related risks.

Several legal frameworks may be relevant.

COSHH Regulations

The Control of Substances Hazardous to Health Regulations 2002 require employers to assess and control relevant exposure to hazardous substances.

COSHH does not prescribe one universal chemical storage warning sign for every situation.

Safety Signs and Signals Regulations

The Health and Safety (Safety Signs and Signals) Regulations 1996 require appropriate workplace safety signage where significant risks remain after other relevant control measures have been taken.

They also contain provisions relating to areas, rooms and enclosures used to store significant quantities of hazardous substances.

DSEAR

The Dangerous Substances and Explosive Atmospheres Regulations 2002 may apply where dangerous substances create fire, explosion or related risks.

For relevant flammable storage areas, the assessment may identify additional precautions and signage.

Chemical Classification & Labelling

Applicable CLP requirements govern the classification and labelling of hazardous chemical products.

These requirements are distinct from general workplace warning sign duties.

Remember: Displaying a Chemical Hazard Sign doesn't automatically make a storage area compliant.

Chemical Storage Area Sign Checklist

Before purchasing, review the following.

Identify the Hazards

• Chemicals and substances identified.

• Relevant safety data sheets available.

• Hazard classifications reviewed.

• Incompatible substances considered.

• Storage arrangements assessed.

Choose the Signs

• Relevant chemical warning signs selected.

• Flammable material warnings considered.

• Corrosive and toxic warnings considered.

• No Smoking or No Naked Flames notices considered.

• PPE signs reviewed where appropriate.

• Emergency equipment signs reviewed.

Check Installation

• Signs visible before entering the area.

• All relevant approaches considered.

• Suitable sizes selected.

• Appropriate materials chosen.

• Mounting locations confirmed.

Review and Maintain

• Signs remain legible.

• Damaged signs replaced.

• Notices reviewed when chemicals change.

• Unnecessary or inaccurate signs removed.

Frequently Asked Questions

Does Every Chemical Storage Room Need a Warning Sign?

Not necessarily the same sign. The need for warnings depends on the substances, quantities, hazards and applicable requirements. Areas storing significant quantities of hazardous substances are subject to specific workplace signage provisions.

What Signs Are Needed for a Flammable Chemical Store?

A Flammable Material Warning and relevant prohibition signs, such as No Smoking or No Naked Flames, may be appropriate. The correct selection depends on the substances and risk assessment.

Do Chemical Storage Cupboards Need COSHH Signs?

There is no single universal COSHH Sign. The appropriate warning depends on the substances stored and the risks identified.

Should Chemical Storage Signs Be Yellow or Red?

Recognised workplace warning signs commonly use yellow triangles. Chemical hazard pictograms under CLP use red-bordered diamonds. The correct format depends on the purpose and applicable requirements.

Can I Use a General Chemical Hazard Sign for Mixed Storage?

Possibly, but a general warning may not communicate every relevant hazard. More specific warnings may be necessary.

Are No Smoking Signs Required in Chemical Stores?

They may be required where smoking would create a relevant risk, particularly around flammable substances. The need should be assessed alongside other ignition-source controls.

What Size Chemical Storage Sign Should I Buy?

Choose a size suitable for the viewing distance, mounting position and lighting conditions.

Can Chemical Storage Warning Signs Be Used Outdoors?

Yes, where the selected materials and fixings are suitable for outdoor conditions.

Buy Chemical Storage Area Signs from The Sign Shed

Whether you're fitting out a new chemical store, replacing worn warning notices or reviewing signage across several workplace locations, choosing the right signs helps communicate hazards clearly.

At The Sign Shed, we supply a range of Chemical Hazard Signs for UK laboratories, warehouses, factories, workshops and storage facilities.

Our collection includes warning notices for:

• Corrosive substances.

• Toxic materials.

• Flammable chemicals.

• Acids and battery acid.

• Harmful fumes.

• General chemical hazards.

Choose from a selection of sizes and materials to suit different installation requirements.

Made in Britain, with automatic bulk savings available on eligible orders.

Shop Chemical Hazard Signs at The Sign Shed and find suitable warning notices for your chemical storage area.