HS CodesVI · Products of the chemical or allied industries28 · Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes2815281511281511Chapter 28Copy pageSolidDescriptionSodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium : Sodium hydroxide (caustic soda) : SolidWas this page helpful?YesNoPrevious281420Ammonia in aqueous solutionNextIn aqueous solution (soda lye or liquid soda)281512