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Drug Precursor Chemicals

Information and Guidance
Drug Precursor Chemicals

European legislation seeks to prevent the illicit use of drug precursors. Drug precursors are chemicals that can be used in the illicit manufacture of narcotic drugs and psychotropic substances. The University has duties imposed by the Home Office with regard to the monitoring and trade in drug precursors. There are 28 chemical substances listed as drug precursors which are divided into three categories: - Category 1 – covers the most sensitive substances; - Category 2 – covers less sensitive substances; - Category 3 – covers bulk chemicals that can have different types of uses in the manufacturing process.


A licence is required for the use of all Category 1 substances and an ‘End-User Declaration’ must be completed and provided to the suppliers of all Category 1 and Category 2 drug precursors. 

If you require any information on licensing and licences currently held by the University, please contact Further information can be found in the guidance document below.

Drug Precursors Guidance (Appendix 6)

Precursor chemicals wallchart for domestic licensing


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