5226: Other inorganicbases & metallic (hydr-, per-) oxydes

52261: Ammonia, anhydrous or in aqueous solution 52262: Sodium hydroxide (caustic soda), solid 52263: Sodium hydroxide in aqueous solution 52264: Potassium hydroxide; peroxide of sodium, potassium 52265: Hydroxide & peroxide of magnesium, strontium, baryum 52266: Aluminium hydroxide 52267: Artificial corundum 52268: Hydrazine & hydroxylamine & their inorganic salts 52269: Other inorganic bases & metallic (hydr, per) oxides 5226: Other inorganicbases & metallic (hydr-, per-) oxydes