Marketability proof is essential for excise duty, and absent suppression the extended limitation period and penalties fail.

Excise duty on a product described as plastisol was unsustainable because the department did not prove that it was a stable, commercially marketable excisable commodity. The evidence on shelf life, viscosity behaviour, stability and marketability was incomplete and internally inconsistent, while the appellant's expert evidence was not effectively rebutted and cross-examination on relied-upon material was denied. The extended limitation period was also unavailable because the record showed repeated disclosures by the appellant and no suppression or deliberate misstatement. As the duty demand failed, the consequential penalties and interest likewise could not survive.

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Issues: (i) Whether the mixture termed as plastisol was a marketable excisable product capable of attracting central excise duty; (ii) whether the extended period of limitation and the consequential penalties and interest could be invoked in the facts of the case.

Issue (i): Whether the mixture termed as plastisol was a marketable excisable product capable of attracting central excise duty.

Analysis: The duty demand was founded on the allegation that the mixed product had acquired the character of a stable and marketable plastisol. The record showed, however, that the departmental evidence did not satisfactorily establish shelf life, stability, viscosity behaviour, or commercial marketability. The reports relied upon were found to be incomplete and internally discrepant, and the requested cross-examination relating to the material relied upon in the show cause notice was not granted. The material placed by the appellant, including expert evidence on the role of viscosity depressant and the instability of the product, was not effectively displaced.

Conclusion: The product was not proved to be a marketable excisable commodity, and the duty demand could not be sustained.

Issue (ii): Whether the extended period of limitation and the consequential penalties and interest could be invoked in the facts of the case.

Analysis: The appellant had made repeated declarations and disclosures regarding the manufacturing process and the product obtained. In the absence of suppression, misstatement, or proof of deliberate withholding of material facts, invocation of the extended period was not justified. Once the duty demand itself failed, the penal provisions and interest provisions could not survive. The adjudication was also affected by reliance on material and a classification basis not properly covered by the show cause notices, which offended fairness in decision-making.

Conclusion: The extended period was not invocable, and the penalties and interest were unsustainable.

Final Conclusion: The duty demands, penalties, and interest were set aside, and the appeal succeeded.

Ratio Decidendi: Excise duty cannot be sustained unless the department proves that the product is commercially marketable and excisable, and in the absence of suppression or valid invocation of the extended period, consequential penalties and interest also fail.

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