Frequently asked questions
Understanding and teaching the hazard classes and categories of the CLP Regulation

Could a substance listed in the CLP regulation not have a pictogram at all?

Yes, a substance may be classified in a class and category that does not require the use of a pictogram, but it may still represent a hazard that is indicated in the written information. For example: "Dangerous for the aquatic environment – long-term hazard, category 3", "Toxic for reproduction, effects on or via breastfeeding", "Flammable gas, category 2" (not all listed).

On some bottles, the hazard phrases are written very small and the pictograms are barely visible! What does the CLP regulation require in this respect?

As far as pictograms are concerned, the regulations are clear: the surface area of the red oblique square must not be less than 1 cm ² (the side of the oblique square must be...