Rongalite C Technical Grade from China
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 — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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