COSHH Toolbox Talk
Toolbox Talks are a vital part of day-to-day site safety. They help teams stay aware of key risks, reinforce best practice, and make sure safety standards are consistent across every project.
Handling Hazardous Substances Safely
Ever opened a container on site and been hit by a strong chemical smell? That’s often a sign you’re working with a COSHH-regulated substance—and it’s not something to ignore. Hazardous substances can cause burns, asthma, long-term illness—or worse—without visible warning signs.
Importance of COSHH
COSHH stands for the Control of Substances Hazardous to Health. Every year in the UK, around 12,000 deaths are linked to occupational respiratory diseases, many of which stem from poor chemical handling (HSE, 2023). On-site exposure to cement dust, silica, paints, and solvents puts workers at risk—especially when PPE, storage, or ventilation is overlooked. Toolbox talks on COSHH aren’t just about ticking boxes—they help prevent life-altering harm.
UK Regulations & Legal Compliance
Working with hazardous substances is governed by:
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Control of Substances Hazardous to Health Regulations 2002 (COSHH)
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Health and Safety at Work Act 1974
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Personal Protective Equipment at Work Regulations 2022
Employers must assess risks, substitute harmful substances when possible, and provide control measures like extraction or PPE. Workers must use the controls provided and report any issues or symptoms immediately.
Best Practices & Guidance
Follow these key actions to reduce risk:
Storage & Labelling
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Store substances in original, clearly labelled containers
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Use lockable COSHH cabinets for flammable or toxic products
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Keep safety data sheets (SDS) on site and accessible
Before Use
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Read the SDS or COSHH assessment
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Use PPE as specified (gloves, masks, goggles, coveralls)
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Check for adequate ventilation in the work area
During Use
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Never eat, drink, or smoke when handling substances
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Keep containers sealed when not in use
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Handle powders with care to avoid airborne exposure
After Use
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Dispose of materials according to site procedure
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Wash hands thoroughly—even if you wore gloves
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Report any skin irritation, eye contact, or breathing difficulty
| Do’s | Don’ts |
|---|---|
| Read the COSHH assessment before using any substance | Mix chemicals without authorisation |
| Wear the correct PPE | Leave containers open or unlabelled |
| Store materials securely | Ignore warning labels or safety data sheets |
Questions for Discussion
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Can anyone name substances on site that fall under COSHH?
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What should you check before using a chemical for the first time?
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Who do you report to if you notice a leaking or unlabelled container?
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What PPE is required when mixing or spraying chemicals?
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What are the signs of overexposure to cement dust or solvents?
Key Takeaways
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COSHH covers any substance that could harm health—this includes common site materials like dust, cement, paint, and cleaners.
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Risk assessments and SDS must always be read and followed before use.
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PPE, ventilation, and correct storage are essential control measures.
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Ignoring COSHH procedures risks illness, injury, and legal action.
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Always report unsafe chemical practices or symptoms of exposure.
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