Prekursor ialah mana-mana bahan yang dinyatakan dalam Jadual I dan II, United Nation Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substance 1988.
Bahan-bahan ini juga disebut precursor atau bahan-bahan kimia perlu (essential chemicals) bergantung kepada sifat bahan kimia termasuk precursor tulin, pelarut, bahan-bahan 'Oxidising' dan lain-lain bahan yang digunakan dalam pengilangan haram narkotik dan bahan psikotropik.
Senarai precursor dan bahan kimia yang disenaraikan di bawah Jadual I dan II United Nation Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substance 1988 seperti berikut :
JADUAL I
Ephedrine
Norepheride
Ergometrine
1-ohenyl-2propanone
Pseudoepherine
N-acetylanthranilic Acid
3-4 Methylenedioxyphenyl 2-Propanone
Safrole
Isosafrole
Piperonal
Ephedrine
Norepheride
Ergometrine
1-ohenyl-2propanone
Pseudoepherine
N-acetylanthranilic Acid
3-4 Methylenedioxyphenyl 2-Propanone
Safrole
Isosafrole
Piperonal
JADUAL II
Acetic Anhydride
Acetone
Anthranilic Acid
Ethyl Ether
Phenylacetic Acid
Piperidine
Methyl Ethyl Ketone
Toluene
Potassium Permanganate
Sulphuric Acid
Hydrochloric Acid
Acetic Anhydride
Acetone
Anthranilic Acid
Ethyl Ether
Phenylacetic Acid
Piperidine
Methyl Ethyl Ketone
Toluene
Potassium Permanganate
Sulphuric Acid
Hydrochloric Acid