Sodium Formaldehyde Sulfoxylate Dihydrate Powder
A white crystalline powder, chemically known as sodium formaldehyde sulfoxylate dihydrate (NaHSO2·CH2O·2H2O), used as a reducing agent in textile dyeing and bleaching processes. It falls under HTS 2831.10.1000 as it is specifically the sodium formaldehyde sulfoxylate variant of sodium sulfoxylates, stabilized with organic substances per Chapter 28 notes. This compound acts as a discharge agent for color removal in printing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not formaldehyde-based but another sodium sulfoxylate
Other sodium sulfoxylates excluding formaldehyde variant fall under the residual subheading 2831.10.2000.
If blended with other chemicals or put up for retail sale
Mixtures or preparations not purely chemically defined are classified as chemical preparations in 3824, per exclusions in Chapter 28 notes.
If considered an organic derivative rather than inorganic sulfoxylate
Organic acyclic alcohols with added halogens/oxygen may apply if structure interpreted differently, but Chapter notes prioritize sulfoxylates in 2831.
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Import Tips & Compliance
• Verify chemical purity and provide Certificate of Analysis (CoA) confirming it meets 'chemically defined' criteria per Chapter 28 Note 1 to avoid reclassification
• Ensure SDS includes proper hazard labeling as it's a reducing agent; common pitfall is insufficient documentation leading to holds at port
• Check for stabilization with organic substances as required; unstabilized forms may shift to other sulfoxylate subheadings
Related Products under HTS 2831.10.10.00
Rongalite C Technical Grade
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.
Textile Dyeing Rongalite Auxiliary Chemical
Specialty Rongalite formulation for textile printing paste discharge, chemically sodium formaldehyde sulfoxylate in powdered form. Precisely matches HTS 2831.10.1000 description for sodium formaldehyde sulfoxylate within sulfoxylates of sodium. Used to create white discharge effects on dyed fabrics.
Sodium Formaldehyde Sulfoxylate 99% Pure Crystals
High-purity 99% crystalline sodium formaldehyde sulfoxylate used in chemical synthesis and as a bleaching assistant in paper manufacturing. It is explicitly covered by HTS 2831.10.1000 as sodium formaldehyde sulfoxylate, a sulfoxylate of sodium per Chapter 28 provisions. The compound's role as an organic-stabilized reducing agent confirms its placement.
Industrial Sodium Hydrosulfite Substitute Rongalite
Rongalite powder serving as a stable alternative to sodium hydrosulfite in bleaching and dechlorination processes for pulp and textiles. HTS 2831.10.1000 applies directly as sodium formaldehyde sulfoxylate, distinguished from dithionites in the same heading. Its formaldehyde stabilization qualifies it under Chapter 28's specific inclusions.