TR REACH – KKDIK Registration

What is KKDIK Registration?

KKDIK Registration is the process required under the KKDIK Regulation for companies manufacturing or importing one tonne or more of a chemical substance per year. In Türkiye, registrations are submitted to the Ministry of Environment, Urbanisation, and Climate Change (MoEUCC).

Chemical products that are not registered under KKDIK are subject to trade restrictions, penalties, or legal sanctions. Chemleg can complete your KKDIK registrations on your behalf.

Who Needs to be Involved in KKDIK Registration?

• Manufacturers & Importers placing substances on the Turkish market
• Only Representatives (ORs) acting on behalf of non-Turkish companies
• Downstream Users relying on registered substances for their processes

KKDIK Registration Deadlines

The registration deadlines were updated by the Procedures and Principles Regarding the Implementation of the KKDIK Regulation published on 12 August 2025.  Click here to review.

The revised deadlines are as follows:

You can access our article about KKDIK registration deadlines, which will be available to those who register after the temporary registration process, here.

How Does the KKDIK Registration Process Work?

The KKDIK registration process can be summarized as follows:

• Registration Application:

Manufacturers or importers producing or importing one tonne or more of a substance (as such, in a mixture, or in articles with intended release) per year must apply for registration via the Chemical Registration System (KKS).

• Pre-SIEF (pre-registration) Submission:

Each potential registrant of a substance manufactured or imported at ≥1 tonne/year must submit a Pre-SIEF (pre-registration) to be included in a SIEF in order to enable data sharing and communication with other potential registrants. The deadline to join a SIEF is 31/10/2025. For substances placed on the market for the first time after this date, the pre-SIEF must be submitted within 30 days following the market placement.

• One Substance – One Registration Principle & Lead Registrant Appointment:

Registrants of the same substance must participate in the same joint submission. Potential registrants can query the SIEF status via KKS. Lead registrants must be appointed:

• • By 31/12/2025 for substances placed on the market before the publication of the Procedures and Principles.
  • Within six months for substances placed on the market for the first time after publication.
• Temporary Registration:

If the lead registrant cannot fulfil full registration requirements, they must submit a temporary registration (Annex-1 data of P&P) by 31/03/2026. Member registrants must submit their temporary registrations via KKS by 30/09/2026 following the lead’s temporary registration. Individual registrants not joining a joint registration must also submit temporary registration by 31/03/2026. Annex-1 data must be entered by a Chemical Assessment Expert in KKS, with their certificate attached. Chemleg also provides training for Chemical Assessment Experts under KKDIK.

• Full Registration:

Full registration is completed when the registrant provides the required data according to the tonnage band-specific information requirements of the Regulation. If registrants cannot obtain the required data or access them from publicly available, copyright-free global sources, the lead registrant (or an individual registrant) may request an extension from the Ministry via KKS, with justification.

The Ministry evaluates the justification and may grant an extension (up to two years beyond the final registration deadline for the relevant tonnage band). If data remain unavailable at the end of the extension, the Chemical Advisory Group evaluates the justifications, and the Ministry decides on approval or rejection of the registration for that substance.

Simplify the KKDIK Compliance Process with Chemleg

With professional consultancy support, Chemleg assists you in successfully completing the entire KKDIK process — from Only Representative services to dossier preparation.

Our KKDIK Registration Services include:

• Pre-Registration & Registration Support – Ensuring timely submission and compliance
• Lead & Joint Registration Assistance – Managing SIEF communication and data-sharing
• IUCLID Dossier Preparation & Submission – Creating compliant technical dossiers for KKS
• Chemical Safety Assessment (CSA) & CSR Preparation – Hazard and risk assessment
• Data Gap Analysis & Testing Strategies – Optimizing registration costs and efficiency
• Ongoing Compliance & Updates – Managing post-registration obligations

Our team of regulatory experts ensures that your chemical registrations are complete, accurate, and fully compliant with Turkish regulations. Fill out the form now to get in touch.