TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The acid can be hydrobromic acid, preferably hydrochloric acid or sulfuric acid.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method involves reacting propylene oxide and compound (I) at mol ratio of (1-10):1, preferably (1.5-2):1 optionally with solvent consisting of propanol, isopropanol, n-butanol, t-butanol, isobutanol, 2-methyl tetrahydrofuran, ethyl acetate, N-methylpyrrolidone, acetone, butanone, pentanone, 1,4-dioxane, N,N-dimethyl formamide, and/or dimethyl sulfoxide, preferably methanol, ethanol, water, and/or tetrahydrofuran at 5-189 degrees C for 2-18 hours, preferably at 30-90 degrees C for 6-16 hours. The method further involves adding compound (II) with recrystallization solvent consisting of methanol, ethanol, propanol, isopropanol, tetrahydrofuran, 2-methyl tetrahydrofuran, ethyl acetate, isopropyl acetate, dichloromethane, acetone, petroleum ether, n-hexane, cyclohexane, n-heptane, toluene, xylene, and/or methyl tert-butyl ether, preferably petroleum ether, n-hexane, n-heptane, and/or ethyl acetate; recrystallizing at 0-110 degrees C for 2-18 hours, preferably at 40-100 degrees C for 2 hours; heating and refluxing; cooling to separate out solid; and purifying to obtain compound (II). It further involves reacting compound (II) with acid at mol ratio of (1-3):1, preferably (1-1.5):1 with reaction solvent consisting of methyl tert-butyl ether, n-hexane, petroleum ether, heptane, ether, ethanol, propanol, isopropyl alcohol, n-butyl alcohol, tert-butyl alcohol, isobutyl alcohol, tetrahydrofuran, 2-methyl tetrahydrofuran, N-methyl pyrrolidone, acetone, butanone, pentanone, and/or 1,4-dioxane, preferably ethyl acetate, methanol, methylene dichloride, toluene, and/or water at 0-90 degrees C for 0.5-12 hours, preferably at 0-50 degrees C for 1-4 hours to obtain compound II salt. Preferred Component: The acid is selected from acetic acid, formic acid, trifluoroacetic acid, acetic acid, phosphoric acid, nitric acid, malic acid and/or tartaric acid, preferably oxalic acid, citric acid or methanesulfonic acid. Preferred Definitions:    R1=halo, preferably Cl; and    R2=H.