Extended SDS

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Suppliers of hazardous substances registered at 10 tonnes per year or more are required to provide Exposure Scenarios – summaries of the risk assessment on the identified uses in the registration dossier – to their customers. These Exposure Scenarios are based on the information in the registrant’s Chemical Safety Report. They are annexed to the Safety Data Sheet, thus producing an extended Safety Data Sheet.

The extension to the Safety Data Sheet should complement the information in the 16 sections of the main SDS. It should provide more detail on the uses registered by the manufacturer or importer which they support in their supply chain. This additional information is used by Downstream Users to ensure that their site practices are safe and that exposure is within acceptable limits, both for workers and the environment alike.

No Exposure Scenarios?

There are a number of valid reasons why Exposure Scenarios may not be present in your supplier’s SDS, for example if the substance:

• has not been registered
• has been registered only in the 1-10 tonnes per year band
• has been registered only as an intermediate
• is not hazardous.

Mixtures

Exposure Scenarios and therefore the extended SDS need not be specifically prepared for mixtures. However, the SDS should include advice on precautions and these should be based on exposure scenarios obtained from the suppliers of the substances in the mixture. Formulators must include relevant Exposure Scenarios, as well as using other relevant information, when preparing SDS for their mixtures. One option is for the formulator to pass on the exposure scenarios for the substances driving the mixture’s classification, in practice often as an annex to the mixture SDS called the ‘lead component identification’. Check out our guidance on writing extSDS for mixtures - LCID, SUMIs & SWEDs below,