Chapter 2853 — Customs Tariff Headings
Products classified under Tariff item 28.53
Cyanogen Chloride 99% Purity
Cyanogen chloride (ClCN) is a colorless, toxic gas or liquid used primarily as an intermediate in organic synthesis and chemical manufacturing. It is a separate chemically defined compound of carbon, explicitly listed in Chapter Note 2(e) as classifiable in heading 28.53, and therefore falls under tariff item 2853.10.00.
2853.10.00Cyanogen Chloride Anhydrous Technical Grade
Anhydrous technical grade cyanogen chloride is a chemically defined compound used in bulk chemical processing and non-weaponized military applications. It is explicitly named in Chapter Note 2(e) as classifiable in heading 28.53, and the tariff item 2853.10.00 covers cyanogen chloride regardless of grade, provided it meets the purity requirements of Chapter Note 1.
2853.10.00Industrial Cyanogen Chloride Solution 50% Aqueous
A 50% aqueous solution of cyanogen chloride, stabilized for industrial handling, is classifiable under tariff item 2853.10.00 because Chapter Note 1(b) includes products dissolved in water. The solution is a normal method of putting up this toxic compound for safe transport and use, and the water does not render it suitable for a specific use.
2853.10.00Laboratory Grade Cyanogen Chloride Gas Cylinder
High-purity cyanogen chloride gas compressed in laboratory cylinders is a separate chemically defined compound, explicitly covered by tariff item 2853.10.00. The gaseous form is a normal state for this compound, and Chapter Note 1 does not restrict the physical form, so it qualifies for this item.
2853.10.00Pharma-Grade Cyanogen Chloride for API Synthesis
Pharmaceutical grade cyanogen chloride, meeting USP standards for API synthesis, is a chemically defined compound of high purity. It falls under tariff item 2853.10.00 as cyanogen chloride, regardless of grade, provided it meets the requirements of Chapter Note 1 for separate chemically defined compounds.
2853.10.00Stabilized Cyanogen Chloride for Dye Manufacturing
Cyanogen chloride stabilized with organic inhibitors for safe transport in dye manufacturing is classifiable under tariff item 2853.10.00. Chapter Note 1(d) allows added stabilizers necessary for preservation or transport, provided they do not render the product suitable for a specific use. The primary compound remains cyanogen chloride.
2853.90.002-inch Undoped Gallium Arsenide Test Wafer
A 2-inch undoped gallium arsenide test wafer is used for process control and calibration in semiconductor fabrication. Chapter Note 8 to Chapter 28 states that chemical elements doped for electronics are classified in this chapter only in unworked forms; however, gallium arsenide is a compound, not an element. Undoped wafers cut into discs or wafers fall under heading 3818, not this tariff item.
2853.90.00Aluminum Phosphide
> Aluminum phosphide is a chemically defined inorganic compound used primarily as a fumigant in agriculture to control pests in stored grains. As a phosphide of a metal other than iron, it is classified under heading 28.53, specifically this tariff item for other phosphides.
2853.90.00Aluminum Phosphide Tablets
Aluminum phosphide tablets are a chemically defined inorganic compound used for fumigation, generating phosphine gas upon exposure to moisture. As a phosphide other than ferrophosphorus, it falls under heading 2853. The tablets are presented in a form ready for use, but remain classified as the inorganic compound itself.
2853.90.00Barium Phosphide
> Barium phosphide is a chemically defined metal phosphide used in specialty alloys and as a reducing agent in extractive metallurgy. As a phosphide of a metal other than iron, it is classified under heading 28.53, falling under this tariff item for other phosphides.
2853.90.00Cadmium Phosphide
> Cadmium phosphide is a chemically defined phosphide used as a II-V semiconductor material for infrared detectors and photovoltaics. As a phosphide of a metal other than iron, it is classified under heading 28.53, specifically this tariff item for other phosphides.
2853.90.00Calcium Phosphide
> Calcium phosphide is a chemically defined phosphide used to generate phosphine gas in pyrotechnic signal flares and smoke generators. As a phosphide of a metal other than iron, it is classified under heading 28.53, falling under this tariff item for other phosphides.
2853.90.00Calcium Phosphide Granules
Calcium phosphide granules are a chemically defined inorganic phosphide used in pyrotechnics and signal flares, generating phosphine when in contact with water. As a phosphide other than ferrophosphorus, it is classified under heading 2853. The granular form does not alter its classification as an inorganic compound.
2853.90.00Compressed Air Cylinders
> High-pressure compressed atmospheric air in cylinders for pneumatic tools is explicitly covered by heading 28.53 as 'compressed air'. This tariff item includes compressed air, whether or not rare gases have been removed, making it classifiable under this item.
2853.90.00Conductivity Water ASTM Type I
> ASTM Type I conductivity water with resistivity greater than 18 MΩ·cm is specifically named in heading 28.53 as 'water of similar purity'. This ultra-pure water is used for semiconductor rinsing and falls under this tariff item.
2853.90.00Conductivity Water Type I
Type I conductivity water is ultrapure water with resistivity exceeding 18 MΩ·cm, produced through distillation and deionization for use in semiconductor manufacturing and analytical laboratories. It qualifies under tariff item 2853.90.00 as 'water of similar purity' to distilled or conductivity water, a category explicitly included in this heading. Its high purity and lack of added substances ensure it is not classified elsewhere in Chapter 28.
2853.90.00Copper Phosphide (Phosphor Copper)
Copper phosphide with more than 15% phosphorus by weight is used in metallurgy for deoxidizing and alloying applications. Chapter Note 7 to Chapter 28 explicitly includes this product in heading 2853, overriding any other classification. It is a phosphide, whether or not chemically defined, excluding ferrophosphorus.
2853.90.00Copper Phosphide Powder
Copper phosphide powder containing more than 15% phosphorus by weight is used as a semiconductor material and as a precursor for phosphor copper alloys. Chapter Note 7 to Chapter 28 explicitly places copper phosphide with over 15% phosphorus in heading 2853. This tariff item covers phosphides, whether or not chemically defined, excluding ferrophosphorus.
2853.90.00Cu92P11 Phosphor Copper Waffle Ingots
> High-phosphorus variants of Cu92P11 phosphor copper, supplied as waffle-shaped ingots, contain more than 15% phosphorus by weight. Under Chapter Note 7 of the Customs Tariff, copper phosphide with over 15% phosphorus is explicitly included in heading 28.53, making these ingots classifiable under this tariff item.
2853.90.00Dental Amalgam Alloy
Dental amalgam alloy is a silver-tin-mercury powder used for dental fillings, and is an amalgam other than those of precious metals. Heading 2853 explicitly includes amalgams other than precious metal amalgams. The product is a chemically defined alloy for restorative dentistry.
2853.90.00Distilled Water USP Grade
Distilled water USP grade is ultra-pure water meeting United States Pharmacopeia standards for pharmaceutical use. Heading 2853 explicitly includes distilled water and water of similar purity. It is free of ions and used in injections and laboratory applications.
2853.90.00Gallium-Indium Eutectic Amalgam
Gallium-indium eutectic amalgam is a liquid metal alloy at room temperature, composed of gallium and indium, used in flexible electronics and thermal interface materials. It is classified under tariff item 2853.90.00 as an amalgam other than of precious metals, a category explicitly listed in the heading. The product contains no mercury and is not a precious metal amalgam, aligning with the scope of this tariff item.
2853.90.00High-Phosphorus Phosphor Copper CuP15
> CuP15 grade phosphor copper is a chemically defined phosphide with over 15% phosphorus content, used as a deoxidizer in copper and bronze casting. Chapter Note 7 explicitly includes copper phosphide with more than 15% phosphorus in heading 28.53, so this product falls under this tariff item.
2853.90.00High Purity CuP Phosphor Copper for Brazing
> High-purity CuP phosphor copper with more than 15% phosphorus, supplied in cut wire or coarse powder, is used in silver brazing alloy production. As a copper phosphide exceeding 15% phosphorus, it is classified under heading 28.53 per Chapter Note 7.
2853.90.00Indium-Tin Amalgam
Indium-tin amalgam is a liquid metal alloy used as a thermal expansion liquid in thermometers, consisting of indium and tin. It is classified under tariff item 2853.90.00 as an amalgam other than of precious metals, as it contains no mercury or precious metals. The product's use in thermometers does not affect its classification, as the heading covers all non-precious amalgams.
2853.90.00Industrial Grade Copper Phosphide Cu3P2 Pellets
> Industrial grade copper phosphide (Cu3P2) pellets have a stoichiometry yielding more than 15% phosphorus by weight, used in chemical synthesis and high-performance alloys. Chapter Note 7 places copper phosphide with over 15% phosphorus in heading 28.53, making this product classifiable under this tariff item.
2853.90.00Liquid Air (Synthetic)
Liquid air is liquefied atmospheric air with rare gases not removed, used for cryogenic cooling applications. Heading 2853 explicitly includes liquid air whether or not rare gases have been removed. It is an inorganic compressed or liquefied gas mixture.
2853.90.00Magnesium Phosphide
> Magnesium phosphide is a chemically defined phosphide used in industrial pyrotechnics and as a phosphine generator for fumigation tablets. As a phosphide of a metal other than iron, it is classified under heading 28.53, specifically this tariff item for other phosphides.
2853.90.00Magnesium Phosphide Pellets
Magnesium phosphide pellets are a chemically defined phosphide used for grain fumigation in agriculture, releasing phosphine on contact with water. As a phosphide other than ferrophosphorus, it falls under heading 2853. The pelleted form does not change its classification as an inorganic compound.
2853.90.00Phosphor Copper Alloy CuP8
Phosphor copper alloy CuP8 contains approximately 8% phosphorus by weight combined with copper, used in non-ferrous metallurgy for deoxidizing and alloying. Although its phosphorus content is below 15%, it is classified as a phosphide under heading 2853 as an inorganic compound. This tariff item covers phosphides whether or not chemically defined, excluding ferrophosphorus.
2853.90.00Phosphor Copper Deoxidizer Shot P20Cu80
> P20Cu80 phosphor copper shot contains 20% phosphorus and 80% copper, cast into small spherical pellets for precise addition in aluminum bronze and brass production. With phosphorus content exceeding 15%, it qualifies as copper phosphide under Chapter Note 7 and is classified in heading 28.53.
2853.90.00Phosphor Copper Master Alloy
Phosphor copper master alloy is a high-phosphorus copper alloy containing more than 15% by weight of phosphorus, used as an additive in brass production. It is classified under tariff item 2853.90.00 as a phosphide, per Chapter Note 7 to Chapter 28, which explicitly includes copper phosphide with over 15% phosphorus. The product is not ferrophosphorus, which is excluded from this heading.
2853.90.00Phosphor Copper Master Alloy P18Cu82 Granules
> Granular phosphor copper P18Cu82 with 18% phosphorus content is used for granular feed in continuous casting operations of copper alloys. As a copper phosphide with over 15% phosphorus, it is explicitly included in heading 28.53 by Chapter Note 7.
2853.90.00Silicon Phosphide
> Silicon phosphide is a nonmetal phosphide used as a precursor for chemical vapor deposition in microelectronics and as a doping agent for n-type semiconductors. As a phosphide, it is classified under heading 28.53, falling under this tariff item for other phosphides.
2853.90.00Sodium Amalgam Granules
Sodium amalgam granules consist of sodium dissolved in mercury, used as a reducing agent in organic synthesis. They are classified under tariff item 2853.90.00 as an amalgam other than of precious metals, as the heading covers all non-precious metal amalgams. The product's granular form does not affect its classification, as it is a chemical compound in a defined state.
2853.90.00Sterile Water for Injection
Sterile water for injection (WFI) is highly purified water meeting USP standards for diluting parenteral medications, produced by distillation to ensure pyrogen-free quality. It is classified under tariff item 2853.90.00 as 'distilled or conductivity water' or 'water of similar purity', as it meets the purity criteria of Chapter Note 1. The product is not put up in measured doses or for retail sale, so it does not fall under Section Note 2.
2853.90.00Type II Deionized Water
Type II deionized water has a resistivity of 1-5 MΩ·cm, produced by ion exchange resins for general laboratory washing and rinsing. It is classified under tariff item 2853.90.00 as 'water of similar purity' to distilled or conductivity water, as it meets the purity standards of Chapter Note 1. The product contains no added substances and is not put up for retail sale, ensuring classification in this heading.
2853.90.00Undoped GaAs Wafer 100mm Thick Film Substrate
A 100mm undoped gallium arsenide wafer is designed as a substrate for thick-film deposition in hybrid circuits. Although gallium arsenide is an inorganic compound, wafers cut into discs are excluded from Chapter 28 by Chapter Note 8. Such wafers are classified under heading 3818 as chemically doped or undoped semiconductor wafers.
2853.90.00Undoped GaAs Wafer 6-inch EPI-Ready
A 6-inch epi-ready undoped gallium arsenide wafer has a polished surface for direct epitaxial deposition in high-frequency electronics production. Although gallium arsenide is an inorganic compound, wafers cut into discs are excluded from Chapter 28 by Chapter Note 8. Such wafers are classified under heading 3818 as semiconductor wafers.
2853.90.00Undoped Gallium Arsenide Wafer 150mm for Optoelectronics
A 150mm undoped gallium arsenide wafer is optimized for optoelectronic device fabrication such as laser diodes. Although gallium arsenide is an inorganic compound, wafers cut into discs are excluded from Chapter 28 by Chapter Note 8. Such wafers are classified under heading 3818 as semiconductor wafers.
2853.90.00Undoped Gallium Arsenide Wafer 4-inch Diameter
A 4-inch diameter undoped gallium arsenide wafer is used as a substrate in semiconductor manufacturing for devices like LEDs and solar cells. Although gallium arsenide is an inorganic compound, wafers cut into discs are excluded from Chapter 28 by Chapter Note 8. Such wafers are classified under heading 3818 as semiconductor wafers.
2853.90.00Zinc Phosphide
> Zinc phosphide is a dark gray powder phosphide compound employed as a rodenticide for controlling rodents in agricultural and urban settings. As a phosphide of a metal other than iron, it is classified under heading 28.53, specifically this tariff item for other phosphides.
2853.90.00Zinc Phosphide Powder
Zinc phosphide powder is a chemically defined inorganic compound used as a rodenticide active ingredient or in semiconductor applications. As a phosphide other than ferrophosphorus, it is classified under heading 2853. The powder form is consistent with the heading's scope for inorganic compounds.