Chapter 2809 — Customs Tariff Headings
Products classified under Tariff item 28.09
Anhydrous Phosphorus Pentoxide Flake Form
Anhydrous phosphorus pentoxide in flake form, a physical variant of diphosphorus pentaoxide (P2O5) designed for easier handling in automated chemical processing lines. It is used in the synthesis of phosphoric acid anhydrides and as a catalyst support. The flake form does not alter its chemical identity, so it remains classifiable under tariff item 2809.10.00.
2809.10.00Diphosphorus Pentaoxide Anhydride P2O5
Diphosphorus pentaoxide (P2O5), also known as phosphorus pentoxide, is a white, deliquescent powder used primarily as a dehydrating and drying agent in chemical synthesis. It reacts with water to form phosphoric acid, making it a key intermediate in producing various phosphate compounds. As a separate chemically defined compound, it is correctly classified under tariff item 2809.10.00.
2809.10.00P2O5 Phosphorus Pentoxide Technical Grade
Technical grade diphosphorus pentaoxide, a powdery white solid used in large-scale production of phosphate esters and flame retardants. Its strong dehydrating power makes it indispensable in manufacturing detergents and other industrial chemicals. Despite its technical grade, it remains a separate chemically defined compound, qualifying for tariff item 2809.10.00.
2809.10.00Phosphorus Pentoxide Desiccant Grade
High-purity phosphorus pentoxide in granular form, optimized for use as a desiccant in laboratory and industrial drying applications. It avidly absorbs moisture from solvents and gases, forming phosphoric acid traps. The granular form is a physical presentation of the same chemical compound, so it is classifiable under tariff item 2809.10.00.
2809.20.0052% P2O5 Phosphoric Acid for NPK Fertilizer Production
Industrial-grade phosphoric acid at 52% P2O5 concentration from wet process, designed for blending into NPK fertilizers. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Dentrifrice Grade Phosphoric Acid 50%
A 50% aqueous solution of phosphoric acid, chemically defined as H3PO4, formulated for use in toothpaste and dental etching gels. It meets Chapter 28 Note 1(b) as a solution in water and is classifiable under this tariff item as phosphoric acid.
2809.20.00Electronic Grade Phosphoric Acid 99.999%
Ultra-high purity phosphoric acid (99.999% H3PO4) used in semiconductor etching and wafer cleaning. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Fertilizer Grade Phosphoric Acid 52% P2O5
A liquid phosphoric acid solution with approximately 52% available P2O5 equivalents, formulated for agricultural fertilizers. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Food Grade Phosphoric Acid 85%
An 85% aqueous solution of phosphoric acid, chemically defined as H3PO4, used in food and beverage acidification. It meets Chapter 28 Note 1(b) as a solution in water and is classifiable under this tariff item.
2809.20.00Green Liquor Phosphoric Acid 53% P2O5 Fertilizer Grade
Dark green phosphoric acid from wet process with 53% P2O5, high in organic impurities, exclusively for fertilizer use in MAP/DAP plants. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Low Concentration Fertilizer Phosphoric Acid 48% P2O5
A 48% P2O5 phosphoric acid solution optimized for liquid fertilizer formulations. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Merchant Grade Phosphoric Acid 54% P2O5
Merchant grade phosphoric acid (MGA) at 54% P2O5, a wet-process acid used primarily in fertilizer manufacturing. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Pharmaceutical Grade Phosphoric Acid USP
USP-compliant phosphoric acid for pharmaceutical buffering and oral care formulations. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Polyphosphoric Acid 115% P2O5 Equivalent
Concentrated polyphosphoric acid with 115% P2O5 equivalent, used in organic synthesis and catalyst manufacturing. It is a chemically defined polyphosphoric acid, meeting Chapter 28 Note 1(a), and falls under this tariff item.
2809.20.00Polyphosphoric Acid Blend 60% P2O5 Fertilizer Grade
A blend of phosphoric and polyphosphoric acids totaling 60% P2O5 equivalents, used in high-analysis liquid fertilizers. It is a mixture of chemically defined compounds, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric and polyphosphoric acids.
2809.20.00Superphosphoric Acid 105% P2O5
High-concentration superphosphoric acid (105% P2O5) used in liquid fertilizers and chemical synthesis. It is a chemically defined polyphosphoric acid, meeting Chapter 28 Note 1(a), and falls under this tariff item.
2809.20.00Technical Grade Phosphoric Acid 75%
Industrial phosphoric acid at 75% concentration for metal surface treatment and rust removal. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Water Treatment Phosphoric Acid 81%
81% phosphoric acid for corrosion control and scale prevention in cooling water systems. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.
2809.20.00Wet Process Phosphoric Acid 55% P2O5 for MAP Production
Wet-process derived phosphoric acid at 55% P2O5, standard feedstock for monoammonium phosphate (MAP) fertilizer. It is a separate chemically defined compound, meeting Chapter 28 Note 1(a), and falls under this tariff item as phosphoric acid.