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Organo-sulfur compounds: > Other: > Other: > Other: > Other: > Other

Duty Rate (from China)

3.7%
MFN Base Rate3.7%
9903.03.03+0%

Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

Total Effective Rate3.7%

Subheadings

2930.90.92.08O,O-Diethyl S-[2-(diethylamino)- ethyl] phosphorothioate and its alkylated or protonated salts; and Thiodiglycol (INN) (bis(2-hydroxy- ethyl) sulfide)
→
2930.90.92.10Cysteine hydrochloride
→
2930.90.92.122-Ethylhexyl mercaptoacetate
→
2930.90.92.22N,N-Dialkyl (methyl, ethyl, n-propyl or isopropyl) aminoethane-2-thiols and their protonated salts, except for 2-(N,N- dimethylamino)ethanethiol and 2-(N,N- diethylamino)ethanethiol
→
2930.90.92.25Other compounds containing a phosphorus atom to which is bonded one methyl, ethyl, n-propyl or isopropyl group, but no other carbon atoms
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2930.90.92.31Products used principally for rubber processing
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2930.90.92.35Drugs
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2930.90.92.51Other
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Products classified 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.

Benzyl Mercaptan

Benzyl mercaptan (C6H5CH2SH) features a thiol group attached to benzyl carbon, making it an aromatic organo-sulfur compound. Falls in HTS 2930.90.92 as other beyond specific subheadings. Used in flavor/fragrance synthesis.

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.

Tributylphosphine Sulfide

Tributylphosphine sulfide ((C4H9)3P=S) contains phosphorus-sulfur with organic groups, classified as organo-sulfur compound in 2930.90.92. Used as ligand in catalysis and polymer chemistry.

Methoxymethyl Mercaptan

Methoxymethyl mercaptan (CH3OCH2SH) combines ether and thiol functions with direct C-S bond. HTS 2930.90.92 as other organo-sulfur compound taking precedence in chapter order. Flavor chemical intermediate.