3821.00.00 - Prepared culture media for development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells

This HTS category, 3821.00.00, encompasses prepared media specifically formulated for the cultivation, development, or maintenance of microorganisms, including bacteria, viruses, fungi, and other pathogens. It also covers media for growing plant, human, or animal cells, essential for research, diagnostics, and biotechnology applications. These preparations are typically supplied in a ready-to-use state or require minimal addition, such as water, before inoculation.

Unlike sibling categories within Chapter 38, which might cover a broader range of chemical products, prepared culture media are distinguished by their precise biological function. This means that while other chemical mixtures might share some ingredients, the specific composition and intended use for biological growth are key to classifying goods under 3821.00.00. The crucial differentiating factor is the ability of the substance to support and sustain the life or reproduction of biological entities.

Within this classification, a significant subdivision is dedicated to viral transport media. This subcategory, 3821.00.00.10, specifically addresses media designed to preserve the viability of viruses during collection and transit from the patient to the laboratory. This highlights the specialized nature of certain culture media, which can be further refined based on their specific target organisms and preservation requirements.