Disodium Sulfate

Disodium sulfate (sodium sulfate) is a high-volume industrial chemical with major demand in detergent manufacturing, kraft pulp processing, and glass production. The US schedule distinguishes salt cake — the crude, lower-purity form (2833111000) — from refined grades, and further separates anhydrous disodium sulfate (2833115010) from other refined forms (2833115050), reflecting meaningful quality and price differences. Canada leads US imports under this heading, followed by China and India; Germany and Austria also supply the market. Importers sourcing from China should confirm Section 301 applicability for their specific grade.