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No Data, No Market
Definition
'No data, no market' is the foundational REACH principle under Article 5: no substance may be manufactured in or imported into the EU, either on its own, in a mixture, or in an article, above 1 tonne per year without prior registration with ECHA, unless it is exempt. This principle reverses the pre-REACH approach, placing the burden of demonstrating safety on industry rather than on regulators.
Source
REACH Regulation (EC) No 1907/2006, Article 5 (No data, no market principle).
Practical Explanation (Compliance Context)
Before launching any substance above 1 t/year on the EU market, manufacturers and importers must confirm ECHA registration. Placing an unregistered substance on the EU market is a direct REACH violation subject to national enforcement action. Companies sourcing substances from non-EU suppliers must verify that the supplier has a registered Only Representative or that the importer has registered. The ECHA dissemination portal allows public verification of registered substances.