Companies supplying chemicals to both the Turkish and EU markets must comply with two separate but similar regulations: KKDIK in Turkey and REACH in the EU.
Both systems share the 1 tonne/year threshold, tonnage-based data requirements, an IUCLID dossier and the Only Representative option. The differences are the competent authority and system (KKS/Ministry vs REACH-IT/ECHA), dossier language and timeline. EU REACH registration deadlines were completed in 2018, while KKDIK follows the 30 September 2026 process.
Managing both systems together allows efficient reuse of shared data. ONAY Mühendislik manages KKDIK and EU REACH processes in parallel.
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Contact ONAY Mühendislik for KKDIK and REACH compliance support.
Yönetmeliğin resmî tam metni: KKDİK Yönetmeliği — Resmî Gazete.
Same architecture, separate filings
KKDIK and EU REACH share their logic but remain independent systems. Applications go to different authorities through different portals, fees are paid separately and the deadlines do not align. A company selling into both markets therefore runs two projects, not one.
Data travels, rights do not
The studies behind a European dossier can usually serve as the basis for the Turkish one. The right to use them is another matter: if your letter of access covers REACH only, it must be extended or renegotiated for Türkiye. This is where most two-market schedules slip.
One inventory, two tonnage columns
Keep a single substance inventory with separate volume columns for the EU and Türkiye. Volumes rarely match, so the tonnage band and the required data package often differ. Seeing both figures side by side prevents buying a larger data package than either market actually requires.
Deadlines run on separate clocks
The Turkish and European calendars are independent. Treating them as one project usually means one market is prepared late. Keep both sets of dates in a single calendar so the data negotiations for each can start early enough.
Documents are not interchangeable
A European safety data sheet cannot simply be translated for the Turkish market: classification must follow Turkish rules, references must be local and the document is prepared under certified supervision. The underlying hazard data is shared; the document is not.
KKDIK vs EU REACH: Where the Timelines Diverge
In a KKDIK vs EU REACH comparison, the sharpest practical difference is timing. EU REACH deadlines have largely passed, so data usually exists and can be licensed. KKDIK is still working towards its own deadline, which means forums are active and cost-sharing terms are still being negotiated. Planning KKDIK vs EU REACH work in one calendar avoids paying twice for the same study.