Lab-Grade Porcelain Watch Glass
Concave fired porcelain watch glass for covering lab vessels during evaporation. Technical laboratory ceramic under HTS 6909.90.00.00, with porcelain's characteristic translucency and low absorption.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If clay decorative dish of similar form
>3% absorption ornamental clays under 6913.
If roof tile shaped for technical roofing
Building ceramics take precedence over lab covers.
If standard borosilicate glass watch glass
Prevalent glass labware classifies Chapter 70.
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Import Tips & Compliance
• Include diameter/tolerance specs matching lab beakers for technical proof
• Certify chemical inertness; generic disks risk tile classification
• Package as lab consumables, not decorative coasters
Related Products under HTS 6909.90.00.00
Porcelain Crucible for Laboratory Use
A high-purity porcelain crucible fired after shaping, designed for high-temperature melting and analysis in chemical laboratories. It falls under HTS 6909.90.00.00 as ceramic ware for laboratory or chemical uses, meeting the chapter's firing requirement and technical application. The translucent body absorbs less than 0.5% water per US notes.
Alumina Ceramic Boat for Technical Furnaces
A fired alumina ceramic boat used in technical furnaces for sample transport during high-heat processes in metallurgy labs. Classified under HTS 6909.90.00.00 for other ceramic wares of technical uses, as it meets firing requirements and excludes refractory building materials of 6901-6903.
Ceramic Evaporating Dish for Chemical Labs
A glazed porcelain evaporating dish fired for laboratory chemical concentration processes. It qualifies under HTS 6909.90.00.00 as 'other' ceramic wares for chemical or technical uses, distinct from kitchen earthenware due to low water absorption and lab specification.
Silicon Carbide Ceramic Jar for Packing Chemicals
Fired silicon carbide jar used for secure packing and conveyance of corrosive chemical powders in industrial settings. Falls under HTS 6909.90.00.00 for ceramic jars of a kind used for packing goods, as per heading description and chapter firing notes.
Zirconia Ceramic Technical Pot for Catalyst Handling
High-performance zirconia ceramic pot fired for handling catalysts in chemical processing plants. Classified in HTS 6909.90.00.00 as other technical ceramic wares, excluding electrical insulators or Chapter 69 exclusions.
Porcelain Buchner Funnel for Lab Filtration
Fired porcelain Buchner funnel with perforated plate for vacuum filtration in analytical chemistry labs. HTS 6909.90.00.00 applies to this laboratory ceramic ware, confirmed by low water absorption and technical design.