Cysteamine Hydrochloride
Cysteamine HCl (HSCH2CH2NH2•HCl) is the hydrochloride salt of 2-aminoethanethiol, an organo-sulfur compound with direct C-S bond. HTS 2930.90.92 per note 3(C)(1) classifying salts with organic compound. Pharmaceutical intermediate.
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Import Tips & Compliance
• Salt content analysis required to confirm organic compound classification per Chapter note 3(C)
• DEA watch list chemical; enhanced recordkeeping and reporting may apply
• GMP certificate verification for pharmaceutical intermediate use
Related Products under HTS 2930.90.92
Thiophenol
Thiophenol is a chemically defined organo-sulfur compound consisting of a benzene ring with a directly attached thiol group (-SH). It falls under HTS 2930.90.92 as an organo-sulfur compound other than those specified in earlier subheadings of heading 2930. This classification applies to pure thiols where sulfur is directly linked to carbon, distinguishing it from sulfonated or halogenated derivatives.
1-Butanethiol
1-Butanethiol (n-butyl mercaptan) is an acyclic aliphatic thiol with formula CH3(CH2)3SH, a separate chemically defined organo-sulfur compound. Classified in 2930.90.92 as other organo-sulfur compounds where sulfur is directly linked to carbon atom. Used in odorant applications and organic synthesis.
Ethyl 2-Mercaptoacetate
Ethyl 2-mercaptoacetate (HS-CH2COOCH2CH3) is an organo-sulfur ester with thiol group directly attached to carbon. Falls under HTS 2930.90.92 as other organo-sulfur compounds per chapter hierarchy. Used as intermediate in pharmaceutical synthesis.
2-Mercaptoethanol
2-Mercaptoethanol (HS-CH2CH2OH) contains both thiol (-SH) and alcohol (-OH) groups with sulfur directly linked to carbon. Classified in 2930.90.92 as other organo-sulfur compound taking precedence in numerical order. Common biochemical reagent for protein denaturation.
Dithiothreitol (DTT)
Dithiothreitol is a 1,4-dithiol compound (HOCH2(CHOH)2CH2SH)2 with two SH groups directly attached to carbon atoms. HTS 2930.90.92 covers this as other organo-sulfur compound used as reducing agent in biotech. Meets chapter definition for separate chemically defined compounds.
Lipoic Acid
Alpha-lipoic acid contains a five-membered dithiolane ring with sulfur atoms directly linked to carbon. Classified under 2930.90.92 as other organo-sulfur compound used as nutritional supplement and antioxidant. Qualifies per Chapter 29 notes for heterocyclic sulfur compounds.