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.

Overall Mixture Classification Sequence (click on image to enlarge it).

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



Checklist for new physical hazards of mixtures

Hazardous-substance-component-identification-form v1.3 23-01-2018

Mixture physical hazards

https://ttenvironmenta.wpengine.com/clp-knowledgebase/physical-hazard-classification-of-mixtures/ .

Mixture health hazards

https://ttenvironmenta.wpengine.com/clp-knowledgebase/health-hazard-classification-of-mixtures/  .

Mixture environmental hazards

https://ttenvironmenta.wpengine.com/clp-knowledgebase/environmental-hazard-classification-of-mixtures/ .

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