2902.42.00.00 - m-Xylene

This HTS classification, 2902.42.00.00, specifically covers m-xylene, a distinct isomer of xylene. Xylenes, as a group, are aromatic hydrocarbons with the chemical formula C8H10, characterized by a benzene ring with two methyl (CH3) groups attached. m-Xylene, also known as meta-xylene, is defined by the relative positions of these two methyl groups on the benzene ring, being in the 1,3 positions. It is a colorless liquid with a sweet odor and is primarily produced from petroleum refining processes, often as a co-product with other xylene isomers.

It is crucial to distinguish m-xylene from its sibling categories. 2902.41.00.00 covers o-xylene (ortho-xylene), where the methyl groups are in adjacent 1,2 positions. Similarly, 2902.43.00.00 pertains to p-xylene (para-xylene), with the methyl groups in opposite 1,4 positions. 2902.44.00.00 encompasses mixed xylene isomers, which are commercial mixtures containing varying proportions of ortho-, meta-, and para-xylene, as well as ethylbenzene. Therefore, the classification of m-xylene relies on its specific isomeric structure, which dictates its unique chemical and physical properties, differentiating it from other xylene arrangements.

As a leaf node within the HTS, 2902.42.00.00 does not have further subdivisions. Classification under this code should be made when the product is identified as pure m-xylene or a mixture where m-xylene is the predominant isomer and is specifically named as such. Its primary commercial applications include its use as a solvent and as a precursor in the synthesis of other chemicals, most notably isophthalic acid, which is used in the production of polyesters and resins. Proper identification and characterization of the isomeric composition are key to ensuring accurate classification.