Authorisation is one of the REACH processes for managing the risks of hazardous substances.
Substances that are subject to authorisation may not be used in the EU, unless a company (and their registered users) have been authorised to do so.
This will mean that eventually these substances are phased out of all non-essential uses.
The substances that qualify for consideration for authorisation are known as Substances of Very High Concern (SVHC).
Substances to which authorisation applies are listed in Annex XIV of REACH. For each substance included on Annex XIV, a deadline is set after which use of that substance in the EU must stop (known as the 'sunset date'), unless Authorised.
Some substances may be accompanied by a list of specific-uses that do not require authorisation.