| (CAS registry number)
| A. Toxic chemicals:
| | (1) Phosgene: Carbonyl dichloride | (75-44-5)
| (2) Cyanogen chloride | (506-77-4)
| (3) Hydrogen cyanide | (74-90-8)
| (4) Chloropicrin: Trichloronitromethane | (76-06-2)
| B. Precursors:
| | (5) Phosphorus oxychloride | (10025-87-3)
| (6) Phosphorus trichloride | (7719-12-2)
| (7) Phosphorus pentachloride | (10026-13-8)
| (8) Trimethyl phosphite | (121-45-9)
| (9) Triethyl phosphite | (122-52-1)
| (10) Dimethyl phosphite | (868-85-9)
| (11) Diethyl phosphite | (762-04-9)
| (12) Sulfur monochloride | (10025-67-9)
| (13) Sulfur dichloride | (10545-99-0)
| (14) Thionyl chloride | (7719-09-7)
| (15) Ethyldiethanolamine | (139-87-7)
| (16) Methyldiethanolamine | (105-59-9)
| (17) Triethanolamine | (102-71-6)
|