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
Alumina Crucible for Laboratory Use
High-purity alumina crucible designed for high-temperature melting and analysis in chemical laboratories. It features a hardness of 9 on the Mohs scale due to its sintered aluminum oxide composition, meeting Chapter 69 requirements. This product is specifically for use in machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard.
6909.12.10High-Purity Alumina Evaporating Dishes
99.8% alumina ceramic dishes for solvent evaporation in chemistry labs. Hardness equivalent to 9+ Mohs, fired for technical use. These dishes are designed for use in machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard.
6909.12.10Tungsten Carbide Ceramic Grinding Discs
Fired WC ceramic discs for sample preparation in geological labs. Meets 9+ Mohs hardness for durability in technical grinding. These discs are for use in machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard.
6909.12.10Zirconia Grinding Media Balls
Sintered zirconia ceramic balls used in ball mills for fine grinding in chemical and pharmaceutical labs. Achieves Mohs hardness of 9+ from yttria-stabilized zirconia, fired per Chapter 69 standards. These balls are for use in machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard.
6909.12.10Zirconium Oxide Analytical Boats
Sintered ZrO2 ceramic boats for TGA/DSC analysis in materials labs. Hardness 9+ Mohs post-firing, per technical laboratory receptacles. These boats are for use in machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard.
6909.12.90Aluminum 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.
6909.12.90Boron 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.
6909.12.90Fused 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.
6909.12.90Silicon 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.
6909.12.90Silicon 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.