HTS code 2620.99.30.00 covers "Slag, ash and residues (other than from the manufacture of iron or steel), containing arsenic, metals or their compounds › Containing arsenic, mercury, thallium or their mixtures, of a kind used for the extraction of arsenic or those metalsor for the manufacture of their chemical compounds › Other › Materials not provided for elsewhere in this heading containing by weight over 10 percent nickel" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.