HTS Chapter 28 — Inorganic Chemicals Tariff Rates (2026)

HTS Chapter 28 covers inorganic chemicals, encompassing a wide range of products that enter the United States under various tariff classifications. Covers inorganic chemicals including acids, oxides, halides, sulfates, and rare-earth compounds used in industry and manufacturing. The average MFN (Most Favored Nation) duty rate for products in this chapter is 3.2%. Individual rates vary significantly within the chapter, ranging from duty-free to well above the average. In addition to MFN rates, most non-EU imports face the 10% Section 122 tariff (effective February 24, 2026; scheduled to sunset approximately July 24, 2026). EU-origin goods instead fall under the EU-US trade deal's 15% all-inclusive ceiling (effective July 1, 2026) — MFN does not stack on top, and goods with MFN rates of 15% or higher pay MFN only. Chinese imports in this chapter face additional Section 301 tariffs ranging from 7.5% to 100%, depending on the specific product classification. Common products in this chapter include Hydrochloric acid, Sulfuric acid, Sodium hydroxide, Hydrogen peroxide, Titanium dioxide, Rare-earth compounds, Silicon dioxide, Lithium compounds. Related HTS chapters include Chapter 29, Chapter 31, Chapter 38, which cover similar or complementary product categories.