SIEF (Substance Information Exchange Forum)

A Substance Information Exchange Forum (SIEF) is the mandatory collaboration platform under REACH Article 29 for registrants of the same substance to share data and costs for joint registration. SIEFs are formed after pre-registration and bring together all manufacturers and importers of the same substance to: share existing data; agree on classification and labelling; prepare a joint technical dossier submitted by the lead registrant; and negotiate data compensation agreements. Joint submissions are mandatory under REACH except in limited circumstances.

REACH Regulation (EC) No 1907/2006, Article 29 and Article 11.

SIEF participation is compulsory for substances requiring registration. Lead registrants submit the joint data set on behalf of all SIEF members. Data sharing costs are distributed among members under negotiated data compensation agreements. Late joiners to an existing SIEF or late registrants must pay their share of historical study costs. SIEF disputes on data cost sharing can be referred to ECHA’s forum for exchange of information.