Chapter 2852 — Customs Tariff Headings
Subheadings
Products classified under Tariff item 28.52
Dimethylmercury
Dimethylmercury ((CH3)2Hg) is an extremely toxic volatile organomercury compound used in research. It is a chemically defined organic compound of mercury, meeting the criteria of Chapter 28 Note 1(a) and Chapter 28 Note 2. This product is classified under tariff item 2852.10.00 as a chemically defined mercury compound.
2852.10.00Ethylmercury Chloride
Ethylmercury chloride (C2H5HgCl) is an organomercury compound used in organic synthesis research. It is a chemically defined organic compound of mercury, meeting the criteria of Chapter 28 Note 1(a). This product falls under tariff item 2852.10.00 as a chemically defined mercury compound.
2852.10.00Mercuric Acetate
Mercuric acetate (Hg(CH3COO)2) is a white crystalline organomercury compound used in organic synthesis. Though organic, it qualifies as a chemically defined mercury compound under Chapter 28 Note 2, which includes organic products in heading 28.52. This product falls under tariff item 2852.10.00.
2852.10.00Mercuric Bromide
Mercuric bromide (HgBr2) is a white crystalline compound used in photography and medicine. It is a chemically defined inorganic compound of mercury, meeting the criteria of Chapter 28 Note 1(a). This product is classified under tariff item 2852.10.00.
2852.10.00Mercuric Chloride
Mercuric chloride (HgCl2), also known as corrosive sublimate, is a white crystalline inorganic compound of mercury used in laboratory reagents and as a fungicide. It is a chemically defined compound, meeting the criteria of Chapter 28 Note 1(a). This product is classified under tariff item 2852.10.00.
2852.10.00Mercuric Cyanide
Mercuric cyanide (Hg(CN)2) is a highly toxic white powder used in gold mining and electroplating. It is a chemically defined mercury compound, meeting the criteria of Chapter 28 Note 1(a). This product falls under tariff item 2852.10.00, distinct from inorganic base cyanides.
2852.10.00Mercuric Cyanide Gold Extraction Grade
Technical grade mercuric cyanide optimized for amalgamation processes in small-scale gold recovery. Despite industrial impurities below 1%, it meets the criteria for a chemically defined compound under Chapter 28 Note 1(a), as impurities do not alter its essential character. This product falls under tariff item 2852.10.00 as a chemically defined inorganic compound of mercury.
2852.10.00Mercuric Cyanide Laboratory Grade
Mercuric cyanide (Hg(CN)2) is a highly toxic white crystalline compound used in gold mining extraction and organic synthesis. It qualifies as a chemically defined mercury compound explicitly named in Chapter 28, meeting the criteria of Note 1(a) for separate chemically defined compounds. This product is correctly classified under tariff item 2852.10.00.
2852.10.00Mercuric Iodide
Mercuric iodide (HgI2) appears as a bright red crystalline powder, changing to yellow when heated, used in photography and medicine. It is a chemically defined inorganic compound of mercury, meeting the criteria of Chapter 28 Note 1(a). This product is classified under tariff item 2852.10.00.
2852.10.00Mercuric Nitrate
Mercuric nitrate (Hg(NO3)2) is a colorless deliquescent salt used as a catalyst and analytical reagent. It is a chemically defined inorganic compound of mercury, meeting the criteria of Chapter 28 Note 1(a). This product falls under tariff item 2852.10.00.
2852.10.00Mercuric Oxide Red
Red mercuric oxide (HgO) is a scarlet, crystalline powder widely used in the production of batteries, as a chemical reagent, and in pigment applications. As a chemically defined inorganic compound of mercury, it is classified under tariff item 2852.10.00, which covers such mercury compounds regardless of whether they are organic or inorganic in nature.
2852.10.00Mercuric Oxycyanide Reagent
Mercuric oxycyanide (Hg(CN)2·HgO) serves as a specialized reagent in qualitative analysis and pharmaceutical intermediates. This compound is a chemically defined mercury compound, meeting the criteria of Chapter 28 Note 1(a). It falls under tariff item 2852.10.00 as a chemically defined compound of mercury.
2852.10.00Mercuric Phosphate
Mercuric phosphate (Hg3(PO4)2) is a yellow, water-insoluble powder used primarily as an analytical reagent in laboratory settings. As a chemically defined inorganic salt of mercury, it is classified under tariff item 2852.10.00, which covers all chemically defined compounds of mercury, whether inorganic or organic, excluding amalgams.
2852.10.00Mercuric Potassium Cyanide Crystals
Mercuric potassium cyanide (K2[Hg(CN)4]) is used in electroplating baths and as an intermediate in heavy metal separations. It is a chemically defined complex cyanide of mercury and potassium, meeting the criteria of Chapter 28 Note 1(a). This product is classified under tariff item 2852.10.00 as a chemically defined mercury compound.
2852.10.00Mercuric Sulfate
Mercuric sulfate (HgSO4) is a toxic white crystalline powder used in analytical chemistry, as a catalyst in organic synthesis, and in gold extraction processes. As a chemically defined inorganic mercury salt, it is classified under tariff item 2852.10.00, which encompasses all chemically defined mercury compounds except amalgams.
2852.10.00Mercuric Thiocyanate
Mercuric thiocyanate (Hg(SCN)2) is a white, highly sensitive powder known for the 'Pharaoh's serpent' reaction and used in pyrotechnics and as a chemical reagent. As a chemically defined inorganic mercury compound, it is classified under tariff item 2852.10.00, which covers all chemically defined mercury compounds, excluding amalgams.
2852.10.00Mercurous Nitrate
Mercurous nitrate (Hg2(NO3)2) is a colorless, toxic salt used in analytical chemistry and as a reagent in various chemical reactions. As a chemically defined inorganic mercury compound, it is classified under tariff item 2852.10.00, which covers all chemically defined mercury compounds, excluding amalgams.
2852.10.00Pharmaceutical Grade Mercuric Oxide
High-purity mercuric oxide meeting USP standards for use in ophthalmic preparations and antiseptics. It is a chemically defined compound of mercury, meeting the criteria of Chapter 28 Note 1(a) despite pharmaceutical end-use. This product falls under tariff item 2852.10.00 as a chemically defined mercury compound.
2852.10.00Phenylmercuric Acetate
Phenylmercuric acetate (C6H5HgOOCCH3) is an organomercury compound used as a fungicide, slimicide, and preservative in paints and coatings. As a chemically defined organic compound of mercury, it is classified under tariff item 2852.10.00, which covers all chemically defined mercury compounds, whether organic or inorganic, excluding amalgams.
2852.10.00Red Mercuric Oxide Crystals
Red mercuric oxide (HgO) in crystalline form serves as an analytical reagent and pigment precursor in specialized applications. It is a chemically defined inorganic compound of mercury, meeting the criteria of Chapter 28 Note 1(a). This product is classified under tariff item 2852.10.00.
2852.10.00Yellow Mercuric Oxide Powder
Yellow mercuric oxide (HgO) is a chemically defined inorganic compound of mercury used primarily in the production of mercury batteries and as a chemical reagent. It meets the criteria of Chapter 28 Note 1(a) as a separate chemically defined compound. This product falls under tariff item 2852.10.00.
2852.90.10Mercury Albuminate
Mercury albuminate is a chemically defined organic compound of mercury, formed by the combination of albumin with mercury salts. It is used in biochemical research as a protein-mercury complex standard and in analytical applications. This product falls under tariff item 2852.90.10, which specifically covers mercury albuminate.
2852.90.10Pharmaceutical Mercuric Albuminate
Pharmaceutical-grade mercuric albuminate is a purified form of mercury albuminate intended for use in historical topical antiseptics and as a vaccine preservative. It is supplied as a sterile lyophilized powder for reconstitution. This product is classified under tariff item 2852.90.10 as mercury albuminate, regardless of its pharmaceutical grade.
2852.90.90Dimethylmercury
Dimethylmercury is an extremely toxic volatile organomercury compound used in spectroscopy standards. It is a chemically defined organic compound of mercury, excluding amalgams, and falls under tariff item 2852.90.90.
2852.90.90Mercuric Acetate
Mercuric acetate is an inorganic mercury carboxylate used as a catalyst in organic reactions and gold recovery. It is a chemically defined compound of mercury, excluding amalgams, and falls under tariff item 2852.90.90.
2852.90.90Mercuric Chloride (Corrosive Sublimate)
Mercuric chloride, also known as corrosive sublimate, is an inorganic mercury compound used as a disinfectant and in laboratory applications. It is chemically defined and not an amalgam, falling under tariff item 2852.90.90.
2852.90.90Mercuric Iodide Red
Red mercuric iodide is an inorganic mercury halide used as a semiconductor material and in photography. It is a chemically defined compound of mercury, excluding amalgams, and falls under tariff item 2852.90.90.
2852.90.90Mercuric Nitrate
Mercuric nitrate is a colorless crystalline inorganic mercury compound used in organic synthesis and textile mordanting. It is chemically defined and not an amalgam, falling under tariff item 2852.90.90.
2852.90.90Mercuric Oxide Red
Red mercuric oxide is a granular inorganic mercury compound used in battery production and as a chemical intermediate. It is chemically defined and not an amalgam, falling under tariff item 2852.90.90.
2852.90.90Mercuric Phosphate
Mercuric phosphate is an inorganic compound of mercury used in laboratory research and as a chemical reagent. It is a chemically defined mercury compound, excluding amalgams, and therefore falls under tariff item 2852.90.90.
2852.90.90Mercuric Phosphide Crystals
Mercuric phosphide crystals are high-purity inorganic mercury compounds used in semiconductor research and phosphor production. They are chemically defined and not amalgams, qualifying for tariff item 2852.90.90.
2852.90.90Mercuric Sulfate
Mercuric sulfate is a white crystalline inorganic mercury compound used in analytical chemistry and gold extraction. It is chemically defined and not an amalgam, falling under tariff item 2852.90.90.
2852.90.90Mercuric Tannate
Mercuric tannate is a tannate compound of mercury used in pharmaceutical formulations and as a preservative. It is a chemically defined organic compound of mercury, excluding amalgams, and falls under tariff item 2852.90.90.
2852.90.90Mercurous Nitrate
Mercurous nitrate is a mercury(I) salt used in pyrotechnics and as an analytical reagent. As a chemically defined inorganic compound of mercury, it is classified under tariff item 2852.90.90, which covers other mercury compounds not elsewhere specified.
2852.90.90Mercurous Phosphide Powder
Mercurous phosphide powder is an inorganic mercury compound used in pyrotechnic compositions and analytical chemistry. It is chemically defined and not an amalgam, making it classifiable under tariff item 2852.90.90.
2852.90.90Mercurous Tannate Precipitate
Mercurous tannate precipitate is a reagent used in qualitative analysis for protein detection. It is a chemically defined organic compound of mercury, excluding amalgams, and falls under tariff item 2852.90.90.
2852.90.90Methylmercuric Chloride
Methylmercuric chloride is a highly toxic organomercury compound used in environmental toxicology research. As a chemically defined organic compound of mercury, it falls under tariff item 2852.90.90 for other mercury compounds.
2852.90.90Phenylmercuric Acetate
Phenylmercuric acetate is an organomercury fungicide used in paint and wood preservation. As a chemically defined organic compound of mercury, it is classified under tariff item 2852.90.90, which covers other mercury compounds.
2852.90.90Research Mercuric Phosphide
Research mercuric phosphide is a 99.9% pure inorganic mercury compound used in coordination chemistry and toxicology studies. It is chemically defined and not an amalgam, qualifying for tariff item 2852.90.90.