Industrial precursor chemicals as referred to in the Act shall mean raw materials usable to make narcotics. They are categorized into two types based on their properties, each including the following items:1.Category A precursor chemicals (involved in reactions and becoming part of the chemical structures of narcotics, or classified as chemicals used in production of narcotics as announced by the competent authority): acetic anhydride (ethanoic anhydride), phenylacetic acid, anthranilic acid (o-Aminobenzoic acid), N-acetylanthranilic acid, isosafrole, piperonal (3,4-Methylenedioxybenzaldehyde), safrole, piperidine, thionyl chloride, palladium chloride, red phosphorus, iodine, hydriodic acid, hypophosphorous acid, methylamine and benzyl cyanide (as shown in Table I).2. Category B precursor chemicals (involved or not involved in reactions and not becoming part of the chemical structures of narcotics): hydrochloric acid (muriatic acid) having a specific gravity reaching 1.2 or concentration 39.1 w/w % , sulphuric acid having a specific gravity reaching 1.84 or concentration 95~98 w/w %, potassium permanganate, toluene, diethyl ether (ethyl ether), acetone, methyl ethyl ketone (butanone), and ethyl benzoate (as shown in Table II).Table I – Category A.PDFTable II – Category B.PDF