Thioglycolic Acid 99% Pure
Thioglycolic acid (mercaptoacetic acid), a chemically defined organic compound with the formula HSCH₂COOH, classified under HTS 2930.90.4910 as an organo-sulfur acid. It features a sulfur atom directly linked to carbon, fitting Chapter 29 note for separate chemically defined compounds.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing arsenic, lead or other organo-inorganic metals
Organo-inorganic compounds with nonmetals/metals directly linked to carbon fall under heading 2931 per Chapter notes.
If imported as aqueous solution exceeding Chapter 29 solvent limits
Solutions in solvents not solely for safety/transport classified as chemical preparations in Chapter 38.
If sold primarily as metal cleaning agent rather than pure chemical
End-use preparations for specific applications may shift to Chapter 29 oxygen-function carboxylic acids.
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The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide Safety Data Sheet (SDS) and Certificate of Analysis confirming purity ≥99% and CAS 68-11-1 identity
• Verify compliance with TSCA inventory listing; include proper UN 1940 hazardous material declaration
• Avoid misclassification as mixtures; ensure product meets 'separate chemically defined compound' criteria per Chapter 29 notes
Related Products under HTS 2930.90.49.10
Industrial Grade Thioglycolic Acid
Technical grade thioglycolic acid used in polymer synthesis and metal extraction, specifically classified under HTS 2930.90.4910. Meets Chapter 29 requirements as a separate chemically defined organo-sulfur acid with direct C-S bond.
Pharmaceutical Grade Thioglycolic Acid USP
Ultra-pure thioglycolic acid meeting USP standards for pharmaceutical intermediates, classified under HTS 2930.90.4910. Qualifies as chemically defined organo-sulfur acid per Chapter 29 scope.
Thioglycolic Acid with Stabilizer
Thioglycolic acid containing added stabilizer for transport stability, explicitly allowed under Chapter 29 note (f). Remains classified as pure compound under HTS 2930.90.4910, not as mixture.
Distilled Thioglycolic Acid
Vacuum-distilled thioglycolic acid with minimized impurities, certified for electronics-grade applications. Classified under HTS 2930.90.4910 as chemically defined organo-sulfur acid.