Classification of silicone oil turned on chemical definition, leading to Heading 2931.00 and denial of concessional treatment.

Tetramethyl Tetraphenyl Trisiloxane was treated as a chemically well-defined organo-silicon compound because the Chief Chemist's reports and technical literature showed a fixed molecular formula. On that basis, it did not fall within Heading 3910.00 as silicones in primary forms, which are non-chemically defined products. The product was instead classifiable under Heading 2931.00 as an other organo-inorganic compound, so the exemption under Notification No. 345/86-Cus. was unavailable. The classification dispute was therefore resolved against the concession claim.

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Issues: Whether Tetramethyl Tetraphenyl Trisiloxane (silicone oil) was classifiable under Heading 3910.00 as silicones in primary forms, or under Heading 2931.00 as other organo-inorganic compounds, and whether the concession under Notification No. 345/86-Cus. dated 16-6-1986 was available.

Analysis: The classification turned on whether the imported product was a non-chemically defined silicone falling under Heading 3910.00 or a separate chemically defined organic compound falling under Heading 2931.00. The Chief Chemist's reports, supported by technical literature, stated that the product had a fixed molecular formula and was a chemically well defined compound. On that basis, it could not be treated as silicones in primary forms, which are non-chemically defined products. The product therefore answered the description of an organo-silicon compound covered by Heading 2931.00.

Conclusion: The goods were correctly classifiable under Heading 2931.00 and not under Heading 3910.00. The claimed concessional treatment failed, and the appeals were rejected.

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