2934.10.70.00 - 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one; Ethyl 2-(2-aminothiazol-4-yl)-2- hydroxyiminoacetate; Ethyl 2-(2-aminothiazol-4-yl)-2- methoxyiminoacetate; 2-Methyl-4-isothiazolin- 3-one; 2-n-Octyl-4-isothiazolin-3-one; and Thiothiamine hydrochloride

This HTS category, 2934.10.70.00, specifically covers certain heterocyclic compounds containing an unfused thiazole ring, characterized by their particular chemical structures and functionalities. The listed substances, including 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one, various ethyl 2-(2-aminothiazol-4-yl) derivatives, 2-Methyl-4-isothiazolin-3-one, 2-n-Octyl-4-isothiazolin-3-one, and Thiothiamine hydrochloride, are often utilized as biocides, preservatives, or intermediates in the synthesis of pharmaceuticals and agrochemicals. Their classification under this specific subheading is based on the presence of the thiazole ring within their molecular structure, excluding more complex fused ring systems or compounds where the thiazole ring is hydrogenated.

This subheading is distinguished from its sibling, 2934.10.90.00 ("Other"), by the explicit enumeration of the listed chemical compounds. While both subheadings fall under the broader category of compounds containing an unfused thiazole ring, 2934.10.70.00 provides definitive classification for the precisely named substances. Any other compounds meeting the criteria of an unfused thiazole ring but not specifically listed would fall under the residual "Other" category.

As this node is a leaf node within the HTS, there are no further subcategories to introduce. Classification decisions at this level rely on accurately identifying the chemical substance in question and verifying its presence within the enumerated list for 2934.10.70.00. The specific chemical name, CAS number, and purity are critical for accurate customs declaration and classification.