Triphenyl Phosphine Sulfide
Triphenyl phosphine sulfide ((C6H5)3P=S) contains three aromatic phenyl groups with phosphorus-sulfur functionality, qualifying as aromatic organo-sulfur under HTS 2930.90.2900. Used as ligand in catalysis and polymer synthesis. Chapter notes confirm organo-sulfur with nonmetal directly linked to carbon.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If phosphorus considered principal characteristic
Organo-phosphorus compounds may fall under heading 2931 if P-C bond predominates over S.
If inorganic phosphorus sulfides
Inorganic P-S compounds excluded from Chapter 29 per note 2 to Chapter 28.
If catalyst preparations
Supported catalyst versions containing this compound classify in 3815.
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Import Tips & Compliance
• Molecular structure verification critical due to potential phosphine (not sulfur) classification debate
• Air-stable but provide P/S ratio analysis to confirm sulfide vs oxide forms
• Not for Chapter 28 phosphorus compounds per chapter exclusion notes
Related Products under HTS 2930.90.29.00
Thiophenol
Thiophenol is an aromatic organo-sulfur compound with the formula C6H5SH, featuring a phenyl ring directly bonded to a thiol group (-SH). It falls under HTS 2930.90.2900 as an aromatic organo-sulfur compound not specifically provided for elsewhere in heading 2930. This chemical is used in organic synthesis and as a reagent in pharmaceutical manufacturing.
Diphenyl Sulfide
Diphenyl sulfide (C6H5)2S is a diaryl sulfide with two phenyl groups attached to a sulfur atom, a classic aromatic organo-sulfur compound. Classified in HTS 2930.90.2900 as 'Other' aromatic organo-sulfur not elsewhere specified in 2930. Used as a solvent, heat transfer fluid, and chemical intermediate.
Phenyl Isothiocyanate
Phenyl isothiocyanate (C6H5NCS) contains a phenyl group attached to an isothiocyanate (-N=C=S) functionality, qualifying as an aromatic organo-sulfur compound. It imports under HTS 2930.90.2900 as 'Other' aromatic not specified elsewhere. Primarily used in analytical chemistry for derivatizing amines in HPLC.
Benzyl Mercaptan
Benzyl mercaptan (C6H5CH2SH) features a benzyl group (phenylmethyl) with thiol functionality, classified as aromatic organo-sulfur under HTS 2930.90.2900. The direct carbon-sulfur bond and aromatic ring qualify it per heading 2930 scope. Used in flavor/fragrance synthesis and polymer chemistry.
2-Naphthalenethiol
2-Naphthalenethiol (C10H7SH) is a bicyclic aromatic thiol with sulfur directly linked to the naphthalene ring carbon. Falls under HTS 2930.90.2900 as 'Other' aromatic organo-sulfur compounds. Employed in materials science for self-assembled monolayers and as synthetic intermediate.
4-Methylthiophenol
4-Methylthiophenol (p-tolyl mercaptan, CH3C6H4SH) is a substituted aromatic thiol with methyl group ortho/para to thiol functionality. Imports as HTS 2930.90.2900 'Other' aromatic organo-sulfur. Key intermediate for pesticides, pharmaceuticals, and antioxidants.