28120 - Alkalies & Chlorine (Miscellaneous)
28121 - Chlorine, Compressed or Liquefied
2812111 - - Chlorine, Compressed or Liquefied: Gas
2812115 - - Chlorine, Compressed or Liquefied: Liquid
28123 - Sodium hydroxide (Caustic soda)
2812350 - - Sodium hydroxide: Sodium hydroxide (All processes - 100% NaOH)
2812361 - - Sodium hydroxide: 68 - 74% liquid
2812365 - - Sodium hydroxide: all other Liquid
2812367 - - Sodium hydroxide: Dry (All forms)
28125 - Alkalies, Other
2812521 - - Potassium hydroxide (88 - 92% KOH): Liquid
2812523 - - Potassium hydroxide (88 - 92% KOH): Solid
2812530 - - Finished sodium bicarbonate (58% Na 20)
2812535 - - Peroxides of Sodium & Potassium
2812540 - - Potassium carbonate
2812590 - - Alkalies (General) + Soda ash, Potassium carbonate, Sal soda, Modified sodas, etc.
2812599 - - Alkalies (Miscellaneous)
2812XX0 - - Alkalies & Chlorines (Miscellaneous - Volume)
2812XX2 - - Alkalies & Chlorines (Miscellaneous - Speciality)