Thioglycolic Acid
Thioglycolic acid (mercaptoacetic acid) is a colorless liquid organic sulfur compound used in hair perming solutions, metal cleaning, and polymer production. It falls under HTS 2930.90.49 as an organo-sulfur acid with sulfur directly linked to carbon, classified as 'other' acids not specifically enumerated elsewhere in heading 2930.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing metal atoms directly linked to carbon
Organo-inorganic compounds with metals shift to heading 2931 per chapter notes.
If imported primarily as a hair waving/straightening preparation
Formulations ready for consumer use classified by function in Chapter 29 rather than as pure compounds.
If sold as a formulated mixture exceeding 10% concentration
Chemical preparations not chemically defined fall under heading 3824.
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Import Tips & Compliance
• Provide detailed chemical analysis certificates confirming sulfur-carbon bond structure to verify Chapter 29 classification over Chapter 28 inorganic acids
• Include Safety Data Sheets (SDS) and end-use declarations, as cosmetic vs industrial applications may trigger different regulatory scrutiny
• Avoid misclassification as a simple thiol by documenting acid functionality; common pitfall is shipment without proper UN hazard labeling
Related Products under HTS 2930.90.49
3-Mercaptopropionic Acid
3-Mercaptopropionic acid serves as a cross-linking agent in polymer synthesis and corrosion inhibitor. It qualifies for HTS 2930.90.49 as an organo-sulfur carboxylic acid, meeting the direct sulfur-carbon linkage requirement of heading 2930.
Thiosalicylic Acid
Thiosalicylic acid (2-mercaptobenzoic acid) serves in pharmaceutical synthesis and rubber vulcanization. Classified in HTS 2930.90.49 as other organo-sulfur acids per direct S-C linkage requirement.
2-Mercaptopropionic Acid
2-Mercaptopropionic acid is an alpha-thiol carboxylic acid used in pharmaceutical intermediates and metal chelation applications. Classified under HTS 2930.90.49 as an other organo-sulfur acid with the characteristic S-C bond structure defined in heading 2930.
Mercaptosuccinic Acid
Mercaptosuccinic acid (thiomalic acid) functions as a chelating agent in metal recovery processes and biochemical research. HTS 2930.90.49 covers this as an other organo-sulfur acid per the chapter's definition of compounds with S directly bound to C.
2-Mercaptobenzoic Acid
2-Mercaptobenzoic acid is used in dye synthesis and as a reagent in analytical chemistry. It falls under HTS 2930.90.49 as an aromatic organo-sulfur acid, consistent with heading 2930's scope for non-sulfonated S-C compounds.