2815 Sodium hydroxide `caustic soda`, potassium hydroxide `caustic potash`, peroxides of sodium or potassium

2815 (01/1988-..) Sodium hydroxide `caustic soda`, potassium hydroxide `caustic potash`, peroxides of sodium or potassium 28151100 (01/1988-..) Sodium hydroxide `caustic soda` solid 28151200 (01/1988-..) Sodium hydroxide `caustic soda` in aqueous solution `soda lye or liquid soda` 28152000 (01/2009-..) Potassium hydroxide `caustic potash` 28152010 (01/1988-12/2008) Potassium hydroxide `caustic potash` solid 28152090 (01/1988-12/2008) Potassium hydroxide `caustic potash` in aqueous solution `potassium lye or liquid potassium` 28153000 (01/1988-..) Peroxides of sodium or potassium