Customs classification of electrolytic manganese dioxide turned on Chapter 25 limits to crude or physical processing only.

Chapter 25 of the Customs Tariff Act applies only to goods in crude state or goods subjected to washing, grinding, powdering, concentration or other mechanical or physical processes, and not to goods further processed by chemical methods. Electrolytic manganese dioxide used for dry batteries was found to be produced by electrolysis and related processing, which is chemical in nature rather than mechanical or physical. The imported product therefore did not fall within Heading 25.01/32, and after exclusion from Chapter 25, it was classifiable under the residual chemical heading in Chapter 28. The Revenue's classification was upheld.

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Issues: Whether electrolytic manganese dioxide used for dry batteries fell under Heading 25.01/32 of the First Schedule to the Customs Tariff Act, 1975 or under Heading 28.01/58, and whether the Chapter 25 entry covered only manganese dioxide in crude or mechanically/physically processed form.

Analysis: Chapter 25 is governed by Note 1, which limits its application, unless the context otherwise requires, to goods in crude state or to goods washed, ground, powdered, concentrated or otherwise subjected only to mechanical or physical processes, and not to goods calcined or further processed otherwise. Battery grade manganese dioxide was found to be available in crude form, but the imported product was electrolytic manganese dioxide obtained by electrolysis, along with processes such as grinding, dissolving, washing, crushing, neutralisation and pulverising. Electrolysis is a chemical process and not a mechanical or physical process within the meaning of Note 1. The more specific description in Heading 25.01/32 therefore did not extend to the imported product in its upgraded form, and once Chapter 25 was excluded, the residue fell within the chemical heading in Chapter 28.

Conclusion: The imported goods did not qualify under Heading 25.01/32 and were correctly classifiable under Heading 28.01/58. The classification adopted by the Revenue was upheld.

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