COSHH Signs Explained: 9 Symbols and UK Safety Rules

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Posted by: Roland Rhett Last Updated: 22 Jun, 2026 Reading: --
COSHH Signs Explained: 9 Symbols and UK Safety Rules

COSHH signs help workers quickly spot dangerous substances in the workplace. These signs warn of risks like fire, poisoning, burns and harmful fumes. In many UK workplaces, they guide safe actions before handling chemicals. As a result, workers can avoid accidents and health problems. HSE also recorded around 680,000 non-fatal workplace injuries based on Labour Force Survey data. This shows how important clear safety signs are at work.

These signs also help people store and use chemicals safely every day. Furthermore, they support clear communication between staff and visitors. HSE explains that COSHH covers chemicals, dust, gases and biological agents. Therefore, understanding these signs improves safety and reduces mistakes at work.

What are COSHH Signs?

COSHH symbols are workplace safety signs and chemical hazard pictograms. They warn people when a substance may harm health, catch fire, explode, burn skin, damage the environment or create pressure risks. In workplaces, they give a quick visual warning before anyone handles a chemical.

In Great Britain, chemical hazard pictograms follow GB CLP labelling rules. These signs use a red diamond border, a white background and a black symbol. They appear on chemical labels, containers and safety data sheets. HSE lists the official GB CLP hazard pictograms used on hazardous chemical labels. This helps workers identify risks fast and take safe action.

Who Needs to Understand COSHH Symbols?

COSHH is a matter for anyone who uses, stores, moves, cleans, mixes or disposes of hazardous substances. These signs help people stay safe and avoid harmful exposure at work. These symbols are important for cleaners who are using strong chemicals. 

Care home and healthcare cleaning teams also depend on these signs. They use them to handle cleaning products safely and protect patients. Garage and workshop staff also work with risky liquids and materials. Employers, supervisors and safety officers must understand these signs well. Even small workplaces need clear signs when people use harmful products.

Why are COSHH Symbols Important?

COSHH symbols are important. These symbols warn people what can happen if it explodes. They help workers choose the right PPE. This cuts accidents at work. They also support safe chemical storage. This reduces handling risks.

These symbols lower the risk of burns, poisoning, fire and breathing problems. They also help visitors, contractors and new staff understand danger fast. This improves safety in busy places. They also support training. They encourage safe behaviour every day.

COSHH Symbols and Meanings: What are the 9 Signs? 

The 9 main chemical risk symbols are also called GB CLP hazard pictograms. They clearly show the COSHH symbols and meanings on chemical labels. So workers can react fast and stay safe. In addition, HSE lists nine main pictograms, including explosive, flammable, oxidising, corrosive, toxic, gas under pressure, health hazard, serious health hazard and environmental hazard.

Explosive

Explosive symbols show chemicals that may explode from heat, shock or friction. Even a small impact can trigger danger. Keep them away from heat, sparks and pressure.

Flammable

Flammable symbols show substances that catch fire easily. Examples include petrol, acetone and solvents. Always keep them away from flames and sparks.

Oxidising

Oxidising symbols show chemicals that make fire stronger or start fires. Hydrogen peroxide is a common example. Store them away from flammable products.

Corrosive

Corrosive symbols show substances that burn skin and eyes. They can also damage metal. Strong acids and drain cleaners are examples. Always use gloves and eye protection.

Toxic

Toxic symbols warn about substances that can cause serious harm or death in small amounts. Cyanides and certain pesticides fall in this group. Avoid all contact and inhalation.

Environmental Hazard

Environmental hazard symbols show chemicals that harm water, fish and nature. Petrol and pesticides are common examples. Keep them away from drains and soil.

Gas Under Pressure

'Gas under pressure' symbols show gases stored in cylinders. They may explode if heated or cause cold burns. Store cylinders upright and away from heat.

Serious Health Hazard

Serious health hazard symbols warn about long-term effects like cancer or organ damage. Asbestos and benzene are key examples. Always follow strict safety controls.

Health Hazard

Health hazard symbols show risks like irritation, allergies or dizziness. Paints, glues and cleaning products often fall here. Use ventilation and avoid direct contact.

How Do You Read COSHH Hazard Warning Symbols?

COSHH hazard warning symbols give a quick visual warning about danger. However, they do not show full safety instructions. The full meaning of COSHH symbols depends on the product label and its safety data sheet. So, workers must always check more than just the picture.

First, look at the pictogram to identify the hazard type. Next, read the signal word, such as 'Danger' or 'Warning'. Then, check the hazard statement to understand the exact risk. After that, follow the precautionary advice for PPE, storage, spills and first aid.

In addition, do not rely on memory alone when handling chemicals. Always read the full label before use. COSHH tells employers how to control exposure in the workplace. Meanwhile, CLP tells suppliers how to classify, label and package chemicals. HSE explains GB CLP covers hazard labels, hazard statements, hazard pictograms and safety data sheets.

Where are COSHH Signs Used?

COSHH symbols should always appear at the “point of risk". This means the exact place where someone may touch, pour, store, mix, move or clean a hazardous substance. As a result, workers can spot danger right where it happens.

Common locations include chemical bottles and drums, cleaning cupboards and decanted spray bottles. They also appear on laboratory shelves and inside storage rooms. In addition, you will see them on waste containers, spill stations, workshop benches and PPE stations. Safety data sheet folders, training posters and delivery areas also use these signs for clear guidance.

One important rule applies at all times. If a chemical is poured into a smaller container, the new container must stay clearly labelled. Workers should never use any unmarked substance.

How Should Workplaces Use COSHH Signs? 

Workplaces must use COSHH symbols in a clear and simple way. These symbols help workers handle chemicals safely every day. They also stop confusion during normal work tasks. As a result, they help reduce accidents and injuries.

  1. Match each sign to the correct substance.
  2. Keep labels clean, clear and easy to read.
  3. Replace any faded or damaged labels quickly.
  4. Labelled decanted bottles straight away.
  5. Keep incompatible substances stored apart at all times.

What are UK COSHH Duties?

UK COSHH duties make workplaces safe when they use harmful substances. First, employers must assess all chemical risks at work. Next, they must prevent exposure or control it properly. They also need to give clear training, instructions and safety information to workers.

In addition, employers must check safety data sheets for every product. They must also store chemicals safely and keep control measures working well. Regular checks help stop leaks, spills and accidents. Furthermore, they must plan what to do in emergencies.

Finally, employers must review COSHH assessments when products or tasks change. COSHH symbols support this process, but they do not replace proper risk control.

Final Thoughts

In conclusion, COSHH signs help workers notice danger quickly at work. They show if a substance may burn, explode, poison, irritate, corrode, damage health, harm the environment or create pressure risks. However, signs only work when people understand them and act on them. A safe workplace also needs correct labels, safety data sheets, training, PPE, safe storage, spill plans and COSHH risk assessments. If your workplace uses chemicals, dusts, fumes, gases or cleaning products, clear COSHH warning signs can help stop small mistakes from becoming serious accidents.

Frequently Asked Questions (FAQs) 

1. What are the 9 symbols of COSHH?

  1. The 9 COSHH symbols are hazards like explosive, flammable, toxic, corrosive and environmental risks in chemicals.

2. What is the signage for COSHH?

  1. COSHH signage uses GB CLP hazard pictograms to warn workers about chemical dangers.

3. What is a COSHH symbol used for?

  1. A COSHH symbol is used to show chemical risks so workers can stay safe at work.

4. What are the 10 hazard symbols?

  1. There are 9 main GB CLP hazard symbols and workplaces may also use extra safety warning signs.

5. What are the 7 safety symbols?

  1. Seven safety symbols include warning, prohibition, mandatory, emergency, fire, hazard and information signs.

6. What are the 7 types of workplace hazards?

  1. They include physical, chemical, biological, ergonomic, psychosocial, electrical and environmental hazards.

7. What are the 5 basic workplace hazards?

  1. The five main hazards are physical, chemical, biological, ergonomic and safety hazards.

8. What are 6 types of hazards?

  1. Six common hazards are chemical, physical, biological, ergonomic, psychosocial and safety hazards.

9. What are the 7 safety precautions?

  1. Safety precautions include wearing PPE, following instructions, safe storage, training, good hygiene, clear signs and reporting risks.

10. What are the 4 main types of workplace hazards?

  1. The four main types are physical, chemical, biological and ergonomic hazards.