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The CLP Regulation (Classification, Labelling and Packaging) sets out how hazardous chemicals must be classified, labelled and packaged before they are supplied. In Great Britain it is known as GB CLP. It was carried over from EU law at the end of 2020, and HSE is the GB CLP agency. Northern Ireland continues to follow EU CLP.
Who has duties?
| Role | Main duties |
|---|---|
| Manufacturers and importers | Classify substances and mixtures, label and package them, and notify classifications where required |
| Downstream users, such as formulators | Classify mixtures they make, label and package them |
| Distributors | Pass on correct labels and packaging |
Where a substance is on the GB mandatory classification and labelling list (GB MCL list), suppliers must use that classification.
Reading a CLP label
| Element | What it tells you |
|---|---|
| Pictograms | Nine red diamond symbols showing the type of hazard, such as flammable, toxic, corrosive or health hazard |
| Signal word | “Danger” for more severe hazards, “Warning” for less severe ones |
| Hazard statements (H) | What the hazard is, for example H225 Highly flammable liquid and vapour |
| Precautionary statements (P) | How to use, store and dispose of it safely, and what to do in an emergency |
| Product identifier and supplier details | What the product is and who supplied it |
Our guide to hazard symbols explains each of the nine pictograms.
How CLP fits with other law
- CLP tells users about the hazard. COSHH and DSEAR require employers to assess and control the risk where the chemical is used.
- Safety data sheets are required under GB REACH, and section 2 repeats the CLP classification. See our guide to exposure limits and safety data sheets.
- Transport of dangerous goods has its own labelling rules under the carriage regulations.
The ACoP and official guidance
| Publication | Status | What it covers |
|---|---|---|
| HSE guidance on GB CLP and the GB MCL list | Guidance, not an ACoP | Duties, classification, labelling, packaging and the GB mandatory classification and labelling list. |
An Approved Code of Practice (ACoP) has special legal status under section 16 of the Health and Safety at Work Act. If you are prosecuted and did not follow it, you must show that you met the law in some other way that was just as good. Guidance on Regulations has no special legal status, but inspectors refer to it and following it is normally enough to comply. Our guide to UK health and safety legislation lists every law and its ACoP or guidance in one place.
Training that helps
Our COSHH awareness training and COSHH eLearning teach staff to read labels and safety data sheets. For people who assess chemical risks, the NEBOSH National General Certificate covers classification, labelling and control in depth.
Frequently asked questions
What does CLP stand for?
Classification, Labelling and Packaging.
Who enforces CLP in Great Britain?
HSE is the GB CLP agency, with enforcement shared with local authorities and trading standards for consumer products.
What is the difference between “Danger” and “Warning” on a label?
“Danger” is used for more severe hazards and “Warning” for less severe ones.
Is there an ACoP for CLP?
No. HSE publishes guidance.
Read the source
The GB CLP Regulation (retained Regulation (EC) No 1272/2008 as amended for Great Britain); HSE guidance on the CLP Regulation and the GB mandatory classification and labelling list. Facts checked on 7 October 2026.
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