Dithionites and Sulfoxylates (Non-Sodium)

Non-sodium dithionites and sulfoxylates — including zinc dithionite and calcium sulfoxylate — occupy a narrower commercial niche than their sodium counterparts, primarily serving specialty reducing and bleaching applications in textile and chemical processing. The entire heading resolves to a single 10-digit line (2831900000), simplifying classification but requiring careful chemical identification to confirm the compound is not a sodium salt. India leads US supply under this heading, with Germany, Japan, and the United Kingdom also among the top sources.