Oxides of boron; boric acids.
Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined. > Oxides of boron; boric acids. > Oxides of boron; boric acids.
Duty Rate (from China)
Products classified under Tariff item 2810.00.00.00
Anhydrous Boric Oxide Powder
Anhydrous boric oxide (B2O3) is a white, glassy powder used in the production of borosilicate glass and as a flux in metallurgy. It is a separate chemically defined compound of boron, meeting the requirements of Chapter 28 Note 1(a). This tariff item covers oxides of boron, and this product is the anhydrous form of boric oxide.
2810.00.00Boric Acid 99.9% Electronics Grade
Ultra-pure boric acid for semiconductor doping and plasma etching solutions, with 99.9% purity. It is a separate chemically defined compound of boric acid, meeting Chapter 28 Note 1(a). The high purity does not remove it from the heading, as it is still boric acid.
2810.00.00Boric Acid Crystals (H3BO3)
Boric acid (H3BO3) is a weak, monobasic Lewis acid of boron available in white, odorless crystals or powder form, used as an antiseptic and in fire retardants. It is explicitly named in the tariff item as a boric acid. It is a separate chemically defined compound meeting Chapter 28 Note 1(a).
2810.00.00Boric Oxide Sintered Pellets
Sintered boric oxide pellets used in nuclear reactor control rods and high-temperature ceramics. The product is pure B2O3 formed into pellets without chemical change, still an oxide of boron. It meets Chapter 28 Note 1(a) as a separate chemically defined compound.
2810.00.00Boron Sesquioxide Fused Lump
Fused boric oxide lumps from thermal dehydration, used in specialty glass melting. The product is pure B2O3 in irregular shapes, meeting Chapter 28 Note 1(a). The fusion process does not alter the chemical identity, so it remains an oxide of boron.
2810.00.00Boron Trioxide Glass-Grade Powder
High-purity boron trioxide powder designed for borosilicate glass production, providing thermal resistance properties. It is pure B2O3, an oxide of boron, meeting Chapter 28 Note 1(a). The product is not mixed with other substances, so it falls under this tariff item.
2810.00.00Granular Boric Acid for Insecticide
Granular boric acid specifically sized for roach and ant baits, acting as a stomach poison. It is pure boric acid before formulation into pesticides, meeting Chapter 28 Note 1(a). The granular form does not change its chemical identity, so it falls under this tariff item.
2810.00.00Metaboric Acid Powder
Metaboric acid (HBO2), a dehydrated form of boric acid, used in flame retardants and catalysts. It is a boric acid isomer and a separate chemically defined compound, meeting Chapter 28 Note 1(a). The tariff item covers boric acids, including this form.
2810.00.00Orthoboric Acid USP Grade
USP-grade orthoboric acid meets pharmaceutical standards for use in eye washes and as a preservative. It is boric acid, chemically defined per Chapter 28 Note 1(a), with high purity (99.8%+). The pharmaceutical grade does not change its classification under this tariff item.
2810.00.00Technical Grade Boric Acid Flakes
Technical grade boric acid flakes are produced by dehydration of borax and used in ceramics, fertilizers, and as a pH buffer in pools. It is boric acid, meeting Chapter 28 Note 1(a) as a chemically defined compound. The technical grade does not affect classification.