Mercaptoacetic Acid Sodium Salt from Japan
Sodium thioglycolate, the sodium salt of thioglycolic acid, maintains classification with parent mercaptocarboxylic acid. Per Chapter 29 note 3(C)(1), inorganic salts follow organic acid heading HTS 2930.90.4920. Common in hair waving solutions.
Duty Rate — Japan → United States
15%
Rate breakdown
9903.04.6210.8%Pharmaceuticals: patented pharma from JP/EU/KR/CH/LI — 15% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Counterion analysis confirming Na+ <15% w/w for salt classification
• Less corrosive than free acid; UN 3334 Packing Group III
• Verify pH 5-7 range prevents free acid formation during storage