About CLP classification for mixtures
The overall CLP classification sequence for mixtures is:
- identify all component substances, and calculate their exact quantities in the mixture (e.g. if a mixture containing 20% of a substance is used at 50% in the final mixture, the quantity of the substance in the mixture is 10%)
- check that your mixture does not contain any new substances created by chemical reaction
- de-duplicate the components, that is where a substance is included twice (eg the same substance is in two component mixtures), it is listed once and the total quantity in the mixture is identified
- check that your mixture does not contain any new hazards caused by mixing components together
- identify all the hazards that the mixture might have on the basis of the hazardous component substances and any new physical hazards caused by mixing the components together
- classify any hazards where you have data from first principles (for many mixtures this may be things like flash point, pH or other easily-tested physical hazards). For more information, see https://ttenvironmenta.wpengine.com/clp-knowledgebase/clp-classification-from-first-principles/ .
- classify all other hazards according to the mixture methods, depending on the hazard group (physical, health or environmental hazards)
- once you have the CLP-GHS classification, obtain the EUH statements, then generate the label information, check the packaging is suitable, and write the SDS, if required.
You can also download this flowchart as a pdf: Overall Mixture Classification Sequence .
There are two slightly different classification routes depending on whether you have made the mixture yourself, see CLP mixture classification sequence for mixture you have made 10-02-2018, or have imported the mixture and need to either classify from CLP, or you wish to check your supplier’s classification, see CLP mixture classification sequence for imported mixture 10-02-2018.
To help you with classifying mixtures, we have produced a series of summary forms, and also forms which work through the process of classifying for physical, health and environmental hazards of mixtures.
Mixture Summary forms