3822.19.00.40 - Containing methyl chloroform (1,1,1-trichloroethane) or carbon tetrachloride

This HTS category, 3822.19.00.40, specifically classifies diagnostic or laboratory reagents that are prepared for use and are presented on a backing, whether or not in kit form. The defining characteristic of this subcategory is the presence of methyl chloroform (also known as 1,1,1-trichloroethane) or carbon tetrachloride as a component within the reagent. These substances are often included for their solvent or preservative properties, playing a role in the reagent's stability or function.

This classification is distinct from its sibling, 3822.19.00.80, which covers "Other" prepared diagnostic or laboratory reagents on a backing. The key differentiator lies in the explicit inclusion of methyl chloroform or carbon tetrachloride in the composition of the goods under 3822.19.00.40. Products falling under the sibling category would lack these specific chlorinated solvents and represent a broader range of prepared reagents.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, classification under 3822.19.00.40 is determined solely by the identification of methyl chloroform or carbon tetrachloride within a prepared diagnostic or laboratory reagent presented on a backing. Accurate identification of these specific chemical components through product documentation, ingredient lists, or laboratory analysis is crucial for correct classification.