
Aadrikaa Legal Services (ALS) – IDT Tax I Arbitration I Litigation
Date: 27.05.2026
Supreme Court Clarifies Customs Classification of n-Hexane

This Short Article has been prepared & written by Advocate Ravi Shekhar Jha-Delhi High Court, New Delhi. The views expressed are based on his interpretation of the law. He can be reached at his email id intelconsul@gmail.com .
The Supreme Court of India recently delivered a significant judgment in the case of Commissioner of Customs, Kandla, Gujarat vs. Reliance Industries Limited, addressing the correct customs tariff classification of imported n-Hexane. This article provides a detailed overview of the case, the legal arguments, the court’s analysis, and its implications for importers and the customs administration.
Background: The Dispute Over n-Hexane Classification
Reliance Industries imported a product known as n-Hexane (also referred to as Exxsol Hexane) and classified it under Customs Tariff Heading (CTH) 2901.10, which covers pure hydrocarbons as separate chemical compounds. The customs authorities, however, argued that the product should be classified under CTH 2710.00, which pertains to petroleum oils and their preparations, on the grounds that n-Hexane is an admixture of hydrocarbons and not a pure compound.
Key Facts and Proceedings
- Initial Assessment and Show Cause Notice:
- Reliance Industries filed a Bill of Entry classifying n-Hexane under CTH 2901.10.
- Customs authorities, based on a chemical test report, issued a show cause notice proposing classification under CTH 2710.00, citing the product’s distillation range (67Β°C to 70Β°C) and flash point (below 25Β°C).
- Adjudication and Appeals:
- The Assistant Commissioner of Customs ruled in favor of classification under Chapter 27 (CTH 2710.00), treating n-Hexane as a mixture suitable for use as motor spirit.
- Reliance Industries appealed, and the Commissioner (Appeals) reversed the decision, holding that n-Hexane is a pure hydrocarbon and should be classified under Chapter 29 (CTH 2901.10).
- The Customs Excise and Service Tax Appellate Tribunal (CESTAT) upheld the Commissioner (Appeals)’s order, referencing international trade policy and the Harmonized System Nomenclature (HSN) Notes.
Legal Arguments
Revenue’s Position
- The customs authorities argued that the product’s physical properties (boiling and flash points) and the presence of impurities made it a mixture, not a pure compound.
- They contended that HSN Notes should only be used if the tariff is ambiguous, and that the Tariff Act clearly placed the product under Chapter 27.
Reliance Industries’ Position
- The company maintained that n-Hexane is a saturated acyclic hydrocarbon (C6H14) and a separate chemically defined compound, as recognized under Chapter 29.
- They argued that the presence of impurities does not alter its classification, as these are naturally occurring from the manufacturing process and not deliberately added.
- Reliance cited the DGFT Policy Circular and several Supreme Court judgments supporting the use of HSN Notes for tariff interpretation.
Supreme Court’s Analysis
1. Chemical Nature of n-Hexane
- n-Hexane is a saturated acyclic hydrocarbon with a constant ratio of elements and a definitive structural diagram, qualifying it as a separate chemical compound.
- The presence of minor impurities does not change its essential character, as these are not deliberately added.
2. Interpretation of Tariff Headings and HSN Notes
- The court emphasized the importance of HSN Notes as an interpretative guide for tariff classification, especially when the tariff entries are ambiguous or disputed.
- Rule 3(a) of the General Rules for the Interpretation of the Harmonized System states that the most specific description should prevail over a general one.
- Chapter 29 specifically lists hexane as a saturated acyclic hydrocarbon, while Chapter 27 covers petroleum oils and their distillation products but excludes separate chemically defined compounds (except methane and propane).
3. Burden of Proof
- The burden of proof for correct classification lies with the customs authorities. The court found that the Revenue failed to provide evidence that n-Hexane was used as a motor spirit or fuel in spark ignition engines, a requirement for classification under Chapter 27.
4. Policy Circular and International Practice
- The DGFT Policy Circular explicitly classified hexane under Chapter 29, and the court held that such clarifications are binding on customs authorities.
Court’s Conclusion and Ruling
The Supreme Court affirmed the CESTAT’s decision, holding that:
- n-Hexane imported by Reliance Industries is a separate chemically defined compound and should be classified under Chapter 29 (CTH 2901.10), not as a petroleum oil under Chapter 27.
- The Revenue failed to discharge its burden of proof and could not demonstrate that the product met the criteria for classification as a motor spirit.
- The use of HSN Notes and the DGFT Policy Circular was appropriate and decisive in resolving the classification dispute.
Implications of the Judgment
- Clarity for Importers:
- Importers of n-Hexane and similar chemicals can rely on this judgment for correct tariff classification, reducing the risk of disputes and penalties.
- Guidance for Customs Authorities:
- The judgment reinforces the need for customs to provide concrete evidence when challenging self-classification by importers and to follow international nomenclature and policy circulars.
- Revenue Impact:
- The classification under Chapter 29 typically attracts a lower duty rate than Chapter 27, affecting revenue collection but ensuring fairness and legal certainty.
- Legal Precedent:
- The case sets a precedent for the use of HSN Notes and policy circulars in tariff classification, promoting consistency and predictability in customs administration.
Conclusion
The Supreme Court’s decision in the Reliance Industries n-Hexane case provides much-needed clarity on the classification of chemicals under the customs tariff. By upholding the primacy of HSN Notes, the DGFT’s policy guidance, and the principle of specific over general classification, the judgment strengthens the legal framework for importers and customs authorities alike.
Source: Supreme Court
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