Silicone emulsion classification under Chapter 39 upheld over residuary chemical heading for imported antifoam product

An imported antifoam product described as a dimethyl polysiloxane emulsion was classified under Heading 39.01/06 because the product literature, invoice and purchase order showed silicone in emulsion form, which Chapter Note 3(a) to Chapter 39 includes within that heading. Prior decisions distinguished silicone in its primary form from compounded preparations, and the material on record did not show any more specific heading outside Chapter 39. The residuary Heading 38.01/19(1) could not be preferred merely because the goods functioned as a defoamer. Classification under Heading 39.01/06 was therefore upheld and the claim for Chapter 38 classification was rejected.

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Issues: Whether the imported product, described as an antifoam compound and an emulsion of dimethyl polysiloxane formulated in non-ionic emulsifying agents, was classifiable under Heading 39.01/06 of the Customs Tariff Act, 1975 or under the residuary Heading 38.01/19(1).

Analysis: The product literature, invoice and purchase order indicated that the goods were an emulsion of silicone in a non-ionic emulsifier and functioned as a defoamer. Chapter Note 3(a) to Chapter 39 expressly includes liquid or pasty forms, including emulsions, dispersions and solutions, within Heading 39.01/06. The prior decisions relied upon by the parties drew a distinction between silicone in its primary form and compounded or formulated preparations containing silicone; only the former falls within the silicones heading. On the material available, the product appeared to be silicone in emulsion form and no more specific heading than 39.01/06 was shown to cover it. As Chapter 38 was residuary in nature, the goods could not be shifted to that heading merely because they were used as an antifoam agent.

Conclusion: The classification under Heading 39.01/06 was upheld and the contention for classification under Heading 38.01/19(1) was rejected, against the assessee.

Final Conclusion: The appeal failed because the imported antifoam product was treated as falling within the silicone heading in Chapter 39 rather than the residuary chemical heading in Chapter 38.

Ratio Decidendi: An emulsion of silicone falls under Heading 39.01/06 only when the material shown is silicone in emulsion form covered by the chapter notes and not a distinct compounded preparation for a specialised use; a residuary heading cannot be preferred where the specific silicone heading applies.

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