Other
Ceramic wares for laboratory, chemical or other technical uses; ceramic troughs, tubs and similar receptacles of a kind used in agriculture; ceramic pots, jars and similar articles of a kind used for the conveyance or packing of goods. > Ceramic wares for laboratory, chemical or other technical uses: > Articles having a hardness equivalent to 9 or more on the Mohs scale > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 6909.12.90
Alumina Crucible for Laboratory Use
High-purity alumina crucible designed for high-temperature melting and analysis in chemical laboratories. Its sintered aluminum oxide composition achieves a hardness of 9 on the Mohs scale, meeting Chapter 69 requirements for fired ceramic products. This item is classified under tariff item 6909.12.90 as other ceramic wares for laboratory or technical uses.
Aluminum Oxide Technical Packing Jars
Dense aluminum oxide jars used for packing corrosive goods in chemical transport. These fired ceramic jars have a hardness exceeding 9 on the Mohs scale, making them impervious to most reagents. They fall under tariff item 6909.12.90 as other technical ceramic wares for conveyance.
Boron Nitride Crucible for Technical Furnaces
Hexagonal boron nitride ceramic crucible for high-purity melting in semiconductor laboratories. This fired ceramic achieves a Mohs hardness over 9, qualifying it as a technical ware under tariff item 6909.12.90. It offers excellent thermal shock resistance for demanding applications.
Fused Silica Distillation Flask
Fused silica distillation flask for precise distillation in chemical research laboratories. The fired ceramic body reaches a Mohs hardness of 9 or more, meeting Chapter 69 criteria for technical ceramic wares. Its translucent, low-absorption properties make it ideal for handling volatile compounds.
High-Purity Alumina Evaporating Dishes
High-purity alumina evaporating dishes for solvent evaporation in chemistry labs. These 99.8% alumina ceramic dishes have a hardness equivalent to 9+ on the Mohs scale, qualifying as technical ceramic ware. They are chemically inert and thermally stable for laboratory use.
Silicon Carbide Laboratory Mortar and Pestle
Fired silicon carbide mortar and pestle set for grinding hard samples in analytical chemistry labs. Exhibiting a Mohs hardness of 9.5, this set qualifies as technical ceramic ware under tariff item 6909.12.90. It offers high resistance to acids and wear for demanding applications.
Silicon Nitride Laboratory Funnels
Fired silicon nitride funnels for filtration in harsh chemical environments. With a Mohs hardness exceeding 9, these funnels qualify as technical ceramic wares under tariff item 6909.12.90. They offer high corrosion and thermal resistance for laboratory use.
Tungsten Carbide Ceramic Grinding Discs
Fired tungsten carbide ceramic grinding discs for sample preparation in geological labs. These discs meet the 9+ Mohs hardness requirement, qualifying as technical ceramic ware under tariff item 6909.12.90. They are suitable for rock and mineral pulverization due to their durability.
Zirconia Grinding Media Balls
Sintered zirconia ceramic balls used in ball mills for fine grinding in chemical and pharmaceutical labs. These yttria-stabilized zirconia balls achieve a Mohs hardness of 9+, qualifying as technical ceramic ware under tariff item 6909.12.90. They are fired per Chapter 69 standards for durability.
Zirconium Oxide Analytical Boats
Sintered zirconium oxide ceramic boats for TGA/DSC analysis in materials laboratories. These boats have a hardness of 9+ on the Mohs scale post-firing, qualifying as technical laboratory receptacles under tariff item 6909.12.90. They feature precise dimensions for high-temperature testing.