Chapter 6909 — Customs Tariff Headings

China Evaporating Dish

A porcelain evaporating dish used in analytical chemistry to evaporate liquids and concentrate solutions, with high thermal shock resistance. This fired porcelain article is for laboratory use and falls under tariff item 6909.11.00.

China Filter Housing Nozzle

A precision-machined china nozzle designed for filter housings in pharmaceutical processing equipment. Its corrosion-resistant porcelain construction makes it suitable for chemical and technical applications, falling under tariff item 6909.11.00 for ceramic wares of porcelain or china.

China Filtering Crucible with Lid

A porcelain Gooch crucible with a fritted base and lid for quantitative lab filtration, featuring a translucent body. This fired porcelain article is for laboratory chemical use, fitting tariff item 6909.11.00.

China Kjeldahl Digestion Flask

A porcelain flask for nitrogen digestion in protein analysis, chemically inert and fired for laboratory use. This article falls under tariff item 6909.11.00 as a ceramic ware of porcelain for chemical or technical applications.

China Laboratory Stirrer Shaft

A high-purity china shaft component for magnetic stirrers used in chemical laboratories, resistant to acids and bases. As a fired porcelain article for technical applications, it qualifies under tariff item 6909.11.00.

China Reactor Vessel Impeller

An impeller blade assembly made of china for chemical reactor vessels, providing chemical resistance in demanding environments. This fired porcelain article is used for technical purposes and falls under tariff item 6909.11.00.

Laboratory China Weighing Bottle

A ground glass-stoppered porcelain bottle for storing and weighing hygroscopic lab samples. As a fired porcelain article for laboratory use, it qualifies under tariff item 6909.11.00.

Laboratory Porcelain Mortar and Pestle Set

A coarse-glazed porcelain mortar and pestle set for grinding chemicals and samples in labs, non-food grade. This fired porcelain article is for laboratory chemical use, fitting tariff item 6909.11.00.

Porcelain Buchner Funnel

A perforated porcelain funnel for vacuum filtration in laboratories, fired to withstand acids and high temperatures. This fired porcelain article is for laboratory use and falls under tariff item 6909.11.00.

Porcelain Centrifuge Bowl Liner

A liner insert for laboratory centrifuges made of translucent porcelain, designed for sample separation. As a fired porcelain article for technical laboratory use, it is classified under tariff item 6909.11.00.

Porcelain Combustion Boat

A high-form glazed porcelain boat for ash determination in muffle furnaces, for laboratory technical use. As a fired porcelain article, it qualifies under tariff item 6909.11.00.

Porcelain Compressor Piston Ring

A fired porcelain ring for pistons in air compressors used in chemical plants, offering wear resistance. This article serves a technical purpose and is made of porcelain, fitting tariff item 6909.11.00.

Porcelain Crucible for Laboratory Use

A high-fired porcelain crucible designed for melting and heating substances in chemical laboratories, featuring a glazed interior for chemical resistance. This fired porcelain article falls under tariff item 6909.11.00.

Porcelain Extruder Die Insert

A die insert component for plastic extruders in technical manufacturing, made of durable porcelain. This fired porcelain article is used for chemical processing and qualifies under tariff item 6909.11.00.

Porcelain Pump Valve Body

A precision-machined porcelain component used as a valve body in industrial pumps for handling corrosive chemicals. As a fired porcelain article for technical use, it falls under tariff item 6909.11.00.

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.

High-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.

Tungsten 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.

Zirconia 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.

Zirconium 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.

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.

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.

Ceramic Buchner Funnel

A perforated porcelain funnel designed for vacuum filtration in chemical laboratories. It is fired after shaping to withstand corrosive filtrates and high temperatures, making it a ceramic ware for laboratory use under heading 69.09.

Ceramic Evaporating Dish

A shallow, wide porcelain dish used in laboratories to evaporate liquids and concentrate solutions. It is fired after shaping, offering resistance to acids and high temperatures, and is a ceramic ware for laboratory use.

Ceramic Filter Crucible

A porcelain crucible with a porous base designed for filtering molten materials in technical laboratories. Fired after shaping, it is a ceramic ware for chemical or technical use under heading 69.09.

Ceramic Melting Pot for Technical Use

A porcelain pot used for melting alloys or salts in metallurgical laboratories, offering high thermal resistance. It is fired after shaping and is a ceramic ware for technical use under heading 69.09.

Ceramic pH Electrode Holder

A porcelain holder designed to secure pH electrodes in chemical testing setups. Fired after shaping, it is a ceramic ware for laboratory or technical use, classified under heading 69.09.

Ceramic Sintering Boat

A high-fired porcelain boat used for holding powders during sintering in technical ceramic production laboratories. It is fired after shaping and is a ceramic ware for technical use under heading 69.09.

Ceramic Technical Weighing Scoop

A porcelain scoop designed for precise powder weighing in pharmaceutical and chemical laboratories. Fired after shaping, it is a ceramic ware for laboratory use under heading 69.09.

Laboratory Ceramic Desiccator Plate

A porcelain perforated plate used inside desiccators to hold samples during moisture removal in laboratories. Fired after shaping, it is a ceramic ware for laboratory use, classified under heading 69.09.

Laboratory Porcelain Combustion Boat

A small porcelain boat used for sample combustion in elemental analysis laboratories. Fired at high temperatures for ash retention, it is a ceramic ware for laboratory use under heading 69.09.

Porcelain Crucible for Laboratory Use

A high-fired porcelain crucible designed for melting and heating substances in laboratory settings, featuring excellent thermal shock resistance and chemical inertness. It is a ceramic ware for laboratory use under heading 69.09.

Porcelain Distillation Head

A fired porcelain component used in laboratory distillation apparatus, offering chemical resistance and low absorption. It is a ceramic ware for laboratory use under heading 69.09.

Porcelain Gas Washing Bottle

A fired porcelain bottle used for scrubbing gases in chemical laboratories, with a fritted disc for efficient absorption. It is a ceramic ware for laboratory use under heading 69.09.

Porcelain Mortar and Pestle Set

A lab-grade porcelain mortar and pestle set used for grinding and mixing chemicals, with a translucent fired body absorbing less than 0.5% water. It is a ceramic ware for laboratory use under heading 69.09.

Porcelain Spot Test Tile

A glazed porcelain tile with cavities for chemical spot tests in analytical laboratories. Fired after shaping, it is a ceramic ware for laboratory use under heading 69.09.