(1) The following substances are precursors to dangerous drugs, regulated by Title 50, chapter 32, part 4, MCA:

(a) anhydrous ammonia;

(b) barbituric acid;

(c) benzoyl chloride;

(d) boron tribromide;

(e) boron trifluoride;

(f) bromobenzene (monobromobenzene) ;

(g) butamediol-1,4;

(h) citral;

(i) cyclohexanone;

(j) diethylamine;

(k) ethyl malonate (diethyl malonate) ;

(l) dimethylformamide;

(m) dimethylsulfoxide;

(n) ergonovine;

(o) ergotamine;

(p) ethanolamine (monethanolamine) ;

(q) fomamide;

(r) formic acid;

(s) furan;

(t) gallic acid (3,4,5-trihydroxybenzoic acid) ;

(u) gamma butyrolactone;

(v) gamma hydroxybutryic acid;

(w) gloyoxylic acid (formylformic acid) ;

(x) hydriodic acid;

(y) hydroxylamine;

(z) hypophosphorous acid;

(aa) indole;

(ab) iodine in any form;

(ac) isosafrole;

(ad) lithium aluminum hydride (aluminum lithium hydride) ;

(ae) lysergic acid, or other ergot alkaloids which can be used to produce lysergic acid;

(af) malonic acid (propanedioic acid) ;

(ag) methylamine;

(ah) nitroethane;

(ai) nitromethane;

(aj) olivitol;

(ak) oxalyl chloride;

(al) phenylacetic acid;

(am) phenyl-2-propanone (phenylacetone) ;

(an) phosphorous acid;

(ao) phosphorous oxychloride;

(ap) piperidine;

(aq) piperonal;

(ar) red phosphorous;

(as) safrole;

(at) sulfanilamide;

(au) thiourea;

(av) tincture of iodine greater than 2%;

(aw) trifluoracetic anhydride;

(ax) 1,3,5-trimethoxybenzoic acid;

(ay) tyrosine;

(az) white phosphorous;

(ba) yellow phosphorous; and

(bb) any salt, optical isomer, salt of an optical isomer, or preparation that is chemically equivalent to any of the chemicals listed above.