All substances that do not fulfil any of the criteria for phase-in substances are considered as non-phase-in substances. Normally, non-phase-in substances have not been manufactured, placed on the market or used in the EU before 1 June 2008, (unless they were notified under the Dangerous Substances Directive (67/548/EEC)).
Potential manufacturers and importers of non-phase-in substances have to submit an inquiry to ECHA and subsequently register the substance before they can manufacture or import the substance.
All substances notified under the Dangerous Substances Directive (also called NONS) are considered to be registered under REACH and ECHA has assigned registration numbers to all the notifications. The owners of the notifications can claim the registration numbers from ECHA.