GOVERNMENT OF PAKISTAN
APPRAISEMENT COLLECTORATE
CUSTOM HOUSE, KARACHI.
NO. CC-10/97(A) Dated: 14.09.2005.
PUBLIC NOTICE NO.15/2005-(A)
SUB: CLASSIFICATION RULING - SUPRASEC (DNJ-2) ISOCYNATE (DIISOCYANATE DIPHENYL METHANE MDI).
Classification of Suprasec (DNJ-2) Isocynate (Dl-lsocyanate Diphenyl Methane MDI, came up for discussion before the classification committee. It was considered by the committee that test result of instant product, forwarded by M/s HEJ lab, states that the goods are predominantly Diphenylmethane 4-4-Di-isocynates, containing different structural isomers of Diphenylmethane 4-4-Di-isocynates. Purity of all these ocynates, containing different structural isomers of Diphenylmethane 4-4-Di-isocynates. Purity of all the structural isomers is 98.2%. It was considered that single separate chemically defined product, if accompanied by isomers of same organic compounds, will be classified in the heading 2929.1000 of chapter 29 except acyclic mixture of organic compound (reference not 1 (b) to chapter 29).
2. Another view in the committee was that the product is classifiable in PCT heading 3824, as it contains not only isomers but also olegomers. Olegomers, as per condensed chemical dictionary, is a polymer molecule, consisting of only few monomer units (dimmers, trimmers and tetramers). Heading 3824 was further supported by extracts from Encyclopedia of Polymer Science and Technology (vol.15) page 462 which elaborates that MDI consists of Dipehnylmethane 4-4 and 2-4 di-isocynates. The olegomers, present in the sample, will effect to increase the degree of cross linking to give it a specific use rather than general use. Since the impurities have been left intentionally to render the product suitable for specific use rather than a general use, the product falls outside ambit of chapter 29 and attract classification under heading 3824.9099 as chemical preparation not elsewhere specified or included.
3. After careful consideration, the committee approved the classification of chemical namely Suprasec (DNJ-2) under heading 3824.9099.
Signed by
(Dr. Sarfraz Ahmad Warraich)
Additional Collector/
Chairman Classification Committee
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