2930.90.92.08 - O,O-Diethyl S-[2-(diethylamino)- ethyl] phosphorothioate and its alkylated or protonated salts; and Thiodiglycol (INN) (bis(2-hydroxy- ethyl) sulfide)

This HTS classification, 2930.90.92.08, specifically enumerates two distinct organo-sulfur compounds: O,O-Diethyl S-[2-(diethylamino)ethyl] phosphorothioate and its alkylated or protonated salts, and Thiodiglycol (also known by its International Nonproprietary Name or INN), which is chemically identified as bis(2-hydroxyethyl) sulfide. These substances, while both containing sulfur, are distinguished by their unique chemical structures and applications within the broader scope of organic chemicals.

The distinction from sibling categories lies in the precise chemical identity. For instance, 2930.90.92.10 refers to Cysteine hydrochloride, a related amino acid derivative. Similarly, 2930.90.92.12 covers 2-Ethylhexyl mercaptoacetate, a mercaptoacetate ester. Other siblings, such as those under 2930.90.92.22 and 2930.90.92.25, address specific classes of aminoethane-thiols and organophosphorus compounds respectively. This specific subcategory, 2930.90.92.08, is reserved for the phosphorothioate and Thiodiglycol, ensuring a precise classification for these particular chemical entities.

As this classification represents a leaf node within the HTS, there are no further subcategories. Therefore, the focus remains on the accurate identification and classification of the two specified compounds. Importers and exporters should verify the chemical nomenclature and ensure their goods precisely match the description to avoid misclassification. The physical and chemical properties of O,O-Diethyl S-[2-(diethylamino)ethyl] phosphorothioate (and its salts) and Thiodiglycol are the key determinants for classification under this specific code.