Separate chemically defined compounds according to Note 1 to Chapters 28 and 29 of the Combined Nomenclature ( 1 ) , at 90 % concentration or greater, unless otherwise indicated, as follows: Acetone, (CAS RN 67-64-1) (CN code 2914 11 00 ) Acetylene, (CAS RN 74-86-2) (CN code 2901 29 00 ) Ammonia, (CAS RN 7664-41-7) (CN code 2814 10 00 ) Antimony, (CAS RN 7440-36-0) (heading 8110 ) Benzaldehyde, (CAS RN 100-52-7) (CN code 2912 21 00 ) Benzoin, (CAS RN 119-53-9) (CN code 2914 40 90 ) 1-Butanol, (CAS RN 71-36-3) (CN code 2905 13 00 ) 2-Butanol, (CAS RN 78-92-2) (CN code 2905 14 90 ) Iso-Butanol, (CAS RN 78-83-1) (CN code 2905 14 90 ) Tert-Butanol, (CAS RN 75-65-0) (CN code 2905 14 10 ) Calcium carbide, (CAS RN 75-20-7) (CN code 2849 10 00 ) Carbon monoxide, (CAS RN 630-08-0) (CN code 2811 29 90 ) Chlorine, (CAS RN 7782-50-5) (CN code 2801 10 00 ) Cyclohexanol, (CAS RN 108-93-0) (CN code 2906 12 00 ) Dicyclohexylamine (DCA), (CAS RN 101-83-7) (CN code 2921 30 99 ) Ethanol, (CAS RN 64-17-5) (CN code 2207 10 00 ) Ethylene, (CAS RN 74-85-1) (CN code 2901 21 00 ) Ethylene oxide, (CAS RN 75-21-8) (CN code 2910 10 00 ) Fluoroapatite, (CAS RN 1306-05-4) (CN code 2835 39 00 ) Hydrogen chloride, (CAS RN 7647-01-0) (CN code 2806 10 00 ) Hydrogen sulfide, (CAS RN 7783-06-4) (CN code 2811 19 80 ) Isopropanol, 95 % concentration or greater, (CAS RN 67-63-0) (CN code 2905 12 00 ) Mandelic acid, (CAS RN 90-64-2) (CN code 2918 19 98 ) Methanol, (CAS RN 67-56-1) (CN code 2905 11 00 ) Methyl chloride, (CAS RN 74-87-3) (CN code 2903 11 00 ) Methyl iodide, (CAS RN 74-88-4) (CN code 2903 39 90 ) Methyl mercaptan, (CAS RN 74-93-1) (CN code 2930 90 99 ) Monoethyleneglycol, (CAS RN 107-21-1) (CN code 2905 31 00 ) Oxalyl chloride, (CAS RN 79-37-8) (CN code 2917 19 90 ) Potassium sulphide, (CAS RN 1312-73-8) (CN code 2830 90 85 ) Potassium thiocyanate (KSCN), (CAS RN 333-20-0) (CN code 2842 90 80 ) Sodium hypochlorite, (CAS RN 7681-52-9) (CN code 2828 90 00 ) Sulphur, (CAS RN 7704-34-9) (CN code 2802 00 00 ) Sulphur dioxide, (CAS RN 7446-09-5) (CN code 2811 29 05 ) Sulphur trioxide, (CAS RN 7446-11-9) (CN code 2811 29 10 ) Thiophosphoryl chloride, (CAS RN 3982-91-0) (CN code 2853 00 90 ) Tri-isobutyl phosphite, (CAS RN 1606-96-8) (CN code 2920 90 85 ) White/yellow phosphorus, (CAS RN 12185-10-3, 7723-14-0) (CN code 2804 70 00 )