Marketability test for excise: carbide sludge from acetylene production was held non-dutiable as industrial waste.

Carbide sludge generated in the manufacture of acetylene gas was treated as a waste residue, not a manufactured product with a distinct commercial identity. Applying the marketability test as essential to excisability, the analysis found that the sludge, described as lime waste mixed with water and lacking carbide content, did not become dutiable merely because of stray sales or possible material recovery. It was therefore not an excisable commodity and could not be classified under the tariff entry relied upon; the demands and penalties were set aside in favour of the assessee.

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Issues: Whether carbide sludge arising in the manufacture of acetylene gas is a marketable excisable commodity liable to classification under Chapter sub-heading 2849.90 of the Central Excise Tariff Act, 1985.

Analysis: Carbide sludge was found to be the waste residue left after calcium carbide reacts with water in the process of producing acetylene gas. It was treated as lime waste mixed with water, with no carbide content, and as industrial waste rather than a manufactured product having commercial identity. The governing test applied was marketability, which is essential for dutiability. Mere stray sales or the possibility of recovering some material from the residue did not establish that the item was marketable goods capable of excise levy.

Conclusion: Carbide sludge is not an excisable commodity and cannot be classified as dutiable goods under the tariff entry relied upon. The demands and penalties are set aside, in favour of the assessee.

Ratio Decidendi: A residue arising in the course of manufacture is not liable to excise unless it is shown to be marketable goods with a distinct commercial identity.

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