The communication requirements of REACH ensure that not only manufacturers and importers but also their downstream users have enough information to use chemical substances safely.

The main tool for information transfer is the well-established and familiar Safety Data Sheet.

The current duties and responsibilities for Safety Data Sheets remain, as the provisions of the Safety Data Sheets Directive (91/155/EEC) are carried over to REACH: the supplier must provide a Safety Data Sheet to his customer when supplying a dangerous substance or preparation.

However, under REACH a Safety Data Sheet must also be provided when supplying substances that are PBT or vPvB, or preparations containing such substances.

In addition, where exposure scenarios are developed as a result of conducting a Chemical Safety Assessment, they must be annexed to the Safety Data Sheet and thus be appropriately passed down the supply chain. By doing so, the supplier informs his customer about the risk management measures that are implemented or recommended for safe uses of the substance.

A Safety Data Sheet has to be supplied in the official languages of the Member States in which the substance or preparation is placed on the market.

The Safety Data Sheet must be updated if new data become available on hazards or data which may affect the risk management measures, if an authorisation is granted or refused, or if a restriction is imposed.