2902.90.40.00 - Anthracene; and 1,4-Di-(2-methylstyryl)benzene

This HTS category, 2902.90.40.00, specifically covers Anthracene and 1,4-Di-(2-methylstyryl)benzene. Anthracene is a polycyclic aromatic hydrocarbon (PAH) consisting of three fused benzene rings. 1,4-Di-(2-methylstyryl)benzene is an organic compound characterized by a benzene ring substituted with two styryl groups, each containing a methyl substituent. These specific compounds are classified here due to their distinct chemical structures and often their unique optical or electrical properties, which differentiate them from broader hydrocarbon categories.

The distinction from sibling categories is important for accurate classification. While other siblings cover broader groups like pseudocumene, acenaphthene, chrysene, and various alkylbenzenes, this node is reserved for the precise compounds listed. For instance, 2902.90.20.00 includes a range of other polycyclic aromatic hydrocarbons such as acenaphthene and phenanthrene, but not anthracene itself. Similarly, 2902.90.30 pertains to alkylbenzenes and polyalkylbenzenes, a different structural class than the fused rings of anthracene or the substituted styrylbenzene here.

As this is a leaf node, there are no further subcategories within 2902.90.40.00. Therefore, classification hinges directly on the identification of Anthracene or 1,4-Di-(2-methylstyryl)benzene. Importers and exporters should ensure that documentation clearly identifies these specific substances to avoid misclassification, as the characteristics and commercial uses of these compounds are quite specialized.