3006.30 - Opacifying preparations for X-ray examinations; diagnostic reagents designed to be administered to the patient:

This HTS category, 3006.30, encompasses specialized preparations used in medical diagnostics. It specifically includes opacifying agents administered to patients to enhance visibility during X-ray examinations, such as contrast media. Additionally, it covers diagnostic reagents that are designed to be introduced into the patient's body for the purpose of diagnosis. These are distinct from sterile medical supplies, dental materials, first-aid kits, or contraceptive preparations, which fall under other headings within Chapter 30.

The primary function of products classified under 3006.30 is to aid in medical imaging or to facilitate diagnostic testing within the patient. This differentiates them from items like sterile sutures (3006.10) used for wound closure, dental cements (3006.40) for restorative purposes, or lubricant gels (3006.70) used during medical procedures. The focus here is on the diagnostic or imaging enhancement properties of the chemical preparations.

Within this category, two subcategories exist to provide further specificity: 3006.30.10.00, which covers preparations containing antigens or antisera, often used in immunological diagnostic tests, and 3006.30.50.00 for all other diagnostic reagents and opacifying preparations not falling into the preceding subcategory. This granular classification allows for precise identification based on the specific active components or intended application of the diagnostic product.