7017.90 - Other:

This category, HTS 7017.90, encompasses laboratory, hygienic, or pharmaceutical glassware that does not fall under the specific material exclusions or properties defined by its sibling categories. It covers a broad range of glass articles intended for use in scientific, medical, or public health applications, where precision and chemical inertness are often paramount. This includes, but is not limited to, glassware for general laboratory procedures, items used in hygiene practices, and containers or instruments for pharmaceutical purposes.

Distinguishing this category from its siblings is crucial for accurate classification. HTS 7017.10 specifically covers laboratory glassware made from fused quartz or other fused silica, a material known for its exceptional thermal and chemical resistance. Similarly, HTS 7017.20.00.00 is reserved for glassware made of other glass types possessing a very low linear coefficient of expansion, indicating a high degree of dimensional stability across temperature variations. HTS 7017.90, therefore, applies to all other glassware within the scope of 7017 that does not meet these specialized material or thermal properties.

Within HTS 7017.90, further distinctions are made through its subcategories. HTS 7017.90.10.00 specifically classifies microscope slides and micro cover glasses, fundamental tools in microscopy. The remaining items within this broad category are then grouped under HTS 7017.90.50.00 as "Other," encompassing a wide array of laboratory, hygienic, or pharmaceutical glassware that does not fit into the more narrowly defined subcategories, ensuring a comprehensive classification system.