Chemicals used in illicit drug manufacture

Precursors under International Control

List of precursors and chemicals frequently used in the illicit manufacture of narcotic drugs and psychotropic substances under international control including synonyms, Chemical Abstract Service (CAS) registry numbers, and Harmonized System (HS) codes for chemicals in Table I and Table II of the 1988 Convention (Red List)


Chemicals not under international control

Addressing the proliferation of non-scheduled chemicals at the global level: Check chapter IV ("Options to address the proliferation of non-scheduled "designer" precursors at the international level") in INCB's 2018 report on precursors and the conference room paper, “Options to address the proliferation of non-scheduled chemicals, including designer precursors – contribution to a wider policy dialogue”.


Information for competent national authorities*

*restricted access

UNODC manual Clandestine Manufacture of Substances under International Control, available on request from UNODC. 

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Precursor Chemical Monographs 2020 contains technical information on more than 95 chemicals, including their legitimate uses, physical appearance and role in illicit drug manufacture