What are basic substances?
Regulation (EC) No. 1107/2009 introduces the new category of "basic substances" into European plant protection legislation. These substances are defined as active substances that are not primarily used for plant protection, but are nevertheless useful for plant protection and are not marketed as plant protection products. Furthermore, a basic substance must not be of concern see [Regulation 1107/2009, Art. 3 (4)], must not cause endocrine disruption or neurotoxic or immunotoxic effects.
Approval of basic substances
Basic substances are subject to a simplified authorization procedure. Applications for approval can be submitted to the European Commission by manufacturers as well as by interested parties and the Member States.
Approval can be granted for substances for which previous assessments under Community legislation other than plant protection product legislation (e.g. pharmaceutical legislation) have shown that the substance has neither a harmful effect on human or animal health nor an unacceptable effect on the environment.
Authorizations for basic substances are valid for an indefinite period, but can be reviewed by the Commission at any time if there is reason to believe that the criteria are no longer met.
The approval of a basic substance is based on a review report. This defines the identity and specification, describes the permitted applications and defines the conditions under which the basic substance may be used.
The approval status of basic substances can be called up in the European Commission's active substance database. All approved basic substances and all basic substances for which the approval procedure has not yet been completed are listed here. 
 Click on "Active substance", then select "Advanced Search" and Type = Basic substance.