For REACH registrants - IUCLID & CHESAR hosting for REACH registration & compliance.

From substance data to a validated dossier and the Chemical Safety Report — run the whole REACH workflow in a managed cloud. Always-current IUCLID and CHESAR, hosted in the EU.

REACH (Regulation (EC) 1907/2006) is the cornerstone of EU chemical regulation. If you manufacture or import a substance at 1 tonne or more per year, you must register it with ECHA — and that means structured substance data in IUCLID, a Chemical Safety Assessment in CHESAR, and a dossier submitted through REACH-IT. 4chems.com runs all of that for you, so your team can focus on the science and the submission instead of the servers.

The REACH workflow, end to end

The registration path is the same one your regulatory team already knows — and every step touches the tools we host:

Collect substance identity and data — physico-chemical, toxicological, and ecotoxicological study reports.
Enter the data in IUCLID — endpoint study records, structured and validation-ready.
Build the Chemical Safety Report in CHESAR — exposure scenarios and the CSA/CSR, integrated with your IUCLID data.
Generate and validate the dossier — run the IUCLID Validation Assistant / TCC and fix any errors.
Export the .i6z dossier and submit via REACH-IT, pay the ECHA fees, and receive your registration number.

Because your IUCLID environment is always on the current ECHA release, your dossiers validate against the format authorities actually expect — no last-minute surprises from an outdated build before a deadline.

What you can run on 4chems.com

IUCLID 6 cloud hosting — registration dossiers, tonnage-band updates, and structured regulatory data.
CHESAR cloud hosting — Chemical Safety Assessment and CSR generation, tightly integrated with IUCLID.
QSAR Toolbox cloud hosting — fill data gaps with read-across and predictions, reducing reliance on new animal studies.
IIP cloud hosting — faster bulk data entry and navigation across large substance portfolios.

Beyond the first registration

REACH is not “submit once and done.” Your dossiers live on, and so do your obligations:

Tonnage-band changes and new uses mean dossier updates.
ECHA compliance checks and substance evaluation can require you to respond with updated data.
SVHC / Candidate List updates trigger SCIP notifications and supply-chain communication.
New CLP 2026 hazard classes can change how your registered substances are classified — see what CLP 2026 means for your IUCLID dossiers.
The expected REACH revision is set to widen scope (polymers, low-tonnage substances), bringing more companies into registration.

A managed, always-current environment keeps you ready for all of it without an IT project.

Especially valuable for SMEs

The majority of REACH registrants are small and mid-size companies without a dedicated IT or large regulatory team. Managed hosting gives you enterprise-grade IUCLID, CHESAR and QSAR Toolbox — zero installation, automated backups, EU-based and GDPR-compliant — on predictable subscription pricing, with full ownership of your data retained by you.

Already self-hosting?

If you run IUCLID on your own server today and the upkeep has become a burden, the move is straightforward — see our guide on migrating self-hosted IUCLID to the cloud. And if you are weighing your options, compare ECHA’s IUCLID Cloud vs. managed hosting.

Preparing a REACH registration or update? Talk to an expert — we will set up an environment that fits your substances and your timeline.

Oliver helps regulatory and IT teams move IUCLID, CHESAR and the QSAR Toolbox to secure, managed cloud hosting.

Want to learn more? Let’s have a 15 min chat!

Pick a time that suits you best. We’re here to guide you.