Rongalite C Technical Grade from Japan
Technical-grade Rongalite C, a commercial form of sodium formaldehyde sulfoxylate, supplied as free-flowing white powder for industrial vat dyeing. Classified under HTS 2831.10.1000 as the specific sodium formaldehyde sulfoxylate, fitting Chapter 28's dithionites/sulfoxylates stabilized with organics. Essential for reducing vat dyes like indigo in denim production.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide commercial invoice specifying 'sodium formaldehyde sulfoxylate' exact nomenclature to match HTS description precisely
• Comply with TSCA pre-notice if new chemical concerns arise; pitfall is failing to declare reducing properties leading to safety scrutiny
• Confirm 98%+ purity via lab test; lower grades risk classification as mixtures under 3824