Mercaptoacetic Acid Sodium Salt
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If misclassified as simple inorganic sulfur salt
Chapter 29 note 3(C)(1) mandates organic compound heading over inorganic chapters.
If ammonium salt form
Organic base salts follow acid component per note 3(C)(2) numerical order.
If surface-active preparation containing salt
Synthetic detergent preparations exclude pure compounds from Chapter 29.
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Import Tips & Compliance
• 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
Related Products under HTS 2930.90.49.20
Thioglycolic Acid
Thioglycolic acid (mercaptoacetic acid), HSCH2COOH, is a chemically defined organic compound containing a mercapto (-SH) group directly linked to a carbon atom and a carboxylic acid function. It falls under HTS 2930.90.4920 as a mercaptocarboxylic acid within the organo-sulfur compounds of Chapter 29. Commonly used in hair perming solutions, metal extraction, and polymer synthesis.
2-Mercaptopropionic Acid
2-Mercaptopropionic acid (HS-CH2-CH2-COOH) is an organo-sulfur carboxylic acid with both mercapto and carboxyl groups on adjacent carbons. Classified under HTS 2930.90.4920 as 'other mercaptocarboxylic acids' per Chapter 29 notes defining organo-sulfur compounds. Used in pharmaceutical intermediates and chelating agents.
3-Mercaptopropanoic Acid
3-Mercaptopropanoic acid features a three-carbon chain with terminal mercapto and carboxylic acid groups. This separate chemically defined compound qualifies under HTS 2930.90.4920 as a mercaptocarboxylic acid per Chapter 29 scope. Applied in polymer cross-linking and biochemical research.
Mercaptosuccinic Acid
Mercaptosuccinic acid (thiomalic acid) contains both mercapto and dicarboxylic acid functions in a single molecule. Falls under HTS 2930.90.4920 as 'other mercaptocarboxylic acids' since organo-sulfur takes precedence over oxygen functions per Chapter 29 classification rules. Used in heavy metal detoxification.
2-Mercaptobenzoic Acid
2-Mercaptobenzoic acid (thiosalicylic acid) combines aromatic carboxylic acid with ortho-mercapto group. Classified in HTS 2930.90.4920 as aromatic mercaptocarboxylic acid under organo-sulfur compounds. Key intermediate for thioindigo dyes and pharmaceuticals.
4-Mercaptobenzoic Acid
4-Mercaptobenzoic acid features para-substituted mercapto and carboxylic groups on benzene ring. HTS 2930.90.4920 classification as aromatic mercaptocarboxylic acid per Chapter 29 organo-sulfur provisions. Utilized in nanotechnology and self-assembled monolayers.