3808.99.30.00 - Formulated biocides based on 2-methyl-4-isothiazolin-3-one, or 2-n-octyl-4-isothiazolin-3-one, or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures of 5-chloro-2-methyl-4- isothiazolin-3-one and 2-methyl-4- isothiazolin-3-one; and Metaldehyde

This HTS subcategory, HTS Code 3808.99.30.00, specifically classifies formulated biocides based on certain isothiazolinones (such as 2-methyl-4-isothiazolin-3-one, 2-n-octyl-4-isothiazolin-3-one, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures thereof) and Metaldehyde. These products are typically used for their antimicrobial properties in industrial applications or as active ingredients in pest control formulations. The emphasis is on the specific chemical composition of these biocides and their inclusion alongside Metaldehyde, a known molluscicide.

Within the broader category of "Other" disinfectants and similar products, this subcategory is distinguished by its precise chemical formulations. While other "Other" categories might encompass a wider range of disinfectants or products not meeting the specific chemical criteria outlined here, this code is reserved for preparations containing the explicitly listed isothiazolinones or Metaldehyde. This ensures that products with these specific biocidal or pesticidal active ingredients are accurately identified for trade purposes.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is determined by the presence and form of the specified isothiazolinone biocides or Metaldehyde. The "put up in forms or packings for retail sale or as preparations or articles" aspect from the parent heading remains relevant, meaning these are typically ready-to-use formulations or components thereof.