2907.23.00.00 - 4,4'-Isopropylidenediphenol (Bisphenol A, Diphenylolpropane) and its salts

This HTS category, 2907.23.00.00, specifically covers 4,4'-Isopropylidenediphenol, commonly known as Bisphenol A (BPA), and its various salts. Bisphenol A is an organic synthetic compound characterized by two phenol functional groups connected by an isopropylidene bridge. It is a critical building block primarily used in the manufacture of polycarbonate plastics and epoxy resins, found in a wide array of consumer goods, protective coatings, and industrial applications. The salts of Bisphenol A are also included within this classification.

Distinguishing this category from its siblings is crucial for accurate classification. HTS 2907.21.00.00 covers Resorcinol, a dihydroxybenzene isomer with hydroxyl groups meta to each other. HTS 2907.22 covers Hydroquinone (Quinol), where the hydroxyl groups are positioned para to each other. In contrast, 2907.23.00.00 is exclusively for Bisphenol A, where the two phenol rings are linked via an isopropylidene group, conferring distinct chemical properties and industrial uses. The 'Other' category (2907.29) would encompass any other polyphenols that do not fit the specific descriptions of resorcinol, hydroquinone, or Bisphenol A.

As this is a leaf node in the HTS classification, there are no further subcategories under 2907.23.00.00. Therefore, the focus for classification under this code remains on identifying the presence of 4,4'-Isopropylidenediphenol (Bisphenol A) or its salts. Importers and exporters should ensure that the substance being declared precisely matches the chemical structure and common nomenclature of Bisphenol A to correctly utilize this classification.