Chemical residue classification: by-product of Hydrazine manufacture falls under the specific tariff heading for chemical residues.

Residue obtained during Hydrazine manufacture was classified under the tariff entry for residues of chemical and allied industries, not under the heading for salt or mineral products. The material arose as a by-product of a chemical reaction and did not answer the description of salt, denatured salt, pure sodium chloride, or a mineral product within Chapter 25. Because the impugned material was a residual product of chemical manufacturing, the specific heading for chemical residues applied, and general classification principles were unnecessary.

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Issues: Whether the residue obtained during manufacture of Hydrazine was classifiable under Chapter Heading 25.01 as salt or under Chapter Heading 38.23 as a residue of chemical or allied industries.

Analysis: The product emerged as a residue in the course of a chemical reaction carried out to manufacture Hydrazine. It was not a mineral product, nor was it salt, denatured salt, or pure sodium chloride within Chapter 25. The residue did not arise from treatment of ores and was not obtained after the kind of chemical processing contemplated for Chapter 25. Since Hydrazine is a chemical product and the impugned material was only the residual by-product of that manufacture, the more specific entry covering residues of chemical and allied industries was applicable. In such a case, resort to predominance or general classification principles was unnecessary.

Conclusion: The residue was correctly classifiable under Chapter Heading 38.23, now 38.24, and not under Chapter Heading 25.01.

Final Conclusion: The departmental appeal succeeded and the classification adopted by the lower appellate authority was set aside.

Ratio Decidendi: A residue obtained as a by-product of a chemical manufacturing process falls under the specific tariff heading for residues of chemical and allied industries, and not under the heading reserved for mineral salts unless it answers that description in substance.

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