Excise duty rates prescribed for sodium/potassium hydroxides and peroxides, with specified ad valorem and tonnage rates. Exempts specified chemicals from duty in excess of the amount calculated at the prescribed rates under section 5A(1) of the Central Excises and Salt Act, 1944: sodium hydroxide (solid and flake) at Rs. 1,300 per tonne; sodium hydroxide (lye), potassium hydroxide and peroxides of sodium or potassium at 15% ad valorem; and copper oxychloride at nil, for goods under the listed tariff sub headings of the Central Excise Tariff Act, 1985.