Whether the imported product, “n-Hexane” (or “Exxsol Hexane”), should be classified as a Petroleum Oil / Motor Spirit under Chapter 27 of the Customs and Central Excise Tariffs, or as a Saturated Acyclic Hydrocarbon existing as a Separate Chemical Compound under Chapter 29.
The Supreme Court dismissed the appeal filed by the Revenue, confirming that n-Hexane is correctly classifiable under Chapter 29 (specifically CTH 2901.10 and CETH 2901.90).
- Introduction and Factual Matrix
The Respondent-Assessee (M/s Reliance Industries Ltd.) imported a product commercially known as “n-Hexane” or “Exxsol Hexane” and self-classified it under Chapter 29 as a pure organic chemical compound. The Revenue challenged this, issuing a Show Cause Notice based on a chemical test report from SGS Redwood Services. The report indicated that the product had a distillation range of 63–70°C and a flash point below 25°C.
Relying on these physical properties, the Revenue argued that the product was an admixture of various hydrocarbons rather than a pure compound, asserting it should be taxed under Chapter 27 as a “Motor Spirit” (which carries a higher rate of duty). While the Adjudicating Authority ruled in favor of the Revenue, both the Commissioner (Appeals) and the Customs Excise and Service Tax Appellate Tribunal (CESTAT) reversed the decision, prompting the Revenue to appeal to the Supreme Court.
- Arguments Addressed
- Appellant (Revenue): The Revenue argued that because the product contained measurable impurities and fell within a specific distillation and flash-point range, it constituted an admixture/isomer excluded from Chapter 29. They claimed that the domestic Tariff Act was clear and there was no need to rely on Harmonized System Nomenclature (HSN) Notes.
- Respondent (Assessee): The Assessee maintained that n-Hexane is a “separately chemically defined compound” with a linear, acyclic structure ($C_6H_{14}$). They established that the impurities present were minor, unconverted starting materials naturally resulting from fractional distillation, and were not deliberately added. Furthermore, they emphasized that the product was used as an industrial solvent, not as fuel for spark-ignition engines.
- Legal Principles and Reasoning of the Court
The Supreme Court analyzed the dispute across multiple legal and technical grounds:
- Burden of Proof: The Court reiterated that the initial burden of proof in classification matters rests firmly on the Revenue. Taxing authorities must provide concrete oral or documentary evidence rather than mere assertions.
- Interpretation via HSN Notes: Overriding the Revenue’s objections, the Court confirmed that HSN Explanatory Notes serve as an internationally accepted guide and a safe anchor for resolving domestic tariff disputes when the entries are pari materia. Applying Rule 3(a) of the General Rules of Interpretation, a specific product description must always be preferred over a general description.
- Failure to Satisfy “Motor Spirit” Criteria: For a commodity to be classified under Chapter 27 as a Motor Spirit, it must satisfy three cumulative conditions: (1) be a hydrocarbon oil, (2) have a flash point below 25°C, and (3) be suitable for use as fuel in spark-ignition engines. The Court found that the Revenue completely failed to present evidence satisfying the third criteria, whereas the Assessee proved its usage as an industrial solvent.
- Definition of Permissible Impurities: Under Chapter Note 1 of Chapter 29, a separate chemically defined compound remains classifiable under Chapter 29 even if it contains impurities, provided those impurities are unintentional by-products or unconverted starting materials from the manufacturing process. The Court verified from the Kirk-Othmer Encyclopedia that a 63.93% purity level is standard for commercial-grade pure n-Hexane and its linear structure satisfies the requirement of having a “definitive structural diagram”.
- DGFT Finality: The Court highlighted Policy Circular No. 40 dated July 14, 2004, issued by the Directorate General of Foreign Trade (DGFT), which explicitly clarified that the import of Hexane falls under Chapter 29. Under the Foreign Trade Policy, the DGFT’s decision regarding product classification is final and binding on customs authorities.
- Conclusion
The Supreme Court concluded that n-Hexane is a saturated acyclic hydrocarbon properly categorized under Customs Tariff Heading 2901.10 and Central Excise Tariff Heading 2901.90. Misclassifying a derivative organic chemical under Chapter 27 simply to collect higher revenues is legally impermissible. The Supreme Court affirmed the CESTAT order and dismissed the Revenue’s appeal.
2026 INSC 536
Commissioner of Customs, Kandla, Gujarat V. M/S Reliance Industries Limited (D.O.J. 25.05.2026)
