Triphenylphosphine
Triphenylphosphine is an organophosphorus compound with the formula PPh3, containing phosphorus directly bonded to three carbon atoms of phenyl groups. It falls under HTS 2931.49.00 as a non-halogenated organo-phosphorus derivative, classified as 'other' organo-inorganic compounds per Chapter 29 notes. Primarily used as a ligand in organometallic catalysis and Wittig reaction reagent.
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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 contains halogen directly linked to carbon
Halogenated organo-inorganic compounds shift to specific halogenated subheading per Chapter 29 notes.
If classified primarily as organo-sulfur compound
Organo-sulfur compounds take precedence under heading 2930 occurring earlier in numerical order.
If imported as mixture with >95% solvent for transport
Solutions in solvents for safety/transport fall under mixtures of Chapter 38 if not normal commercial form.
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Import Tips & Compliance
• Provide detailed chemical analysis and Safety Data Sheets (SDS) to confirm non-halogenated phosphorus-carbon bonding
• Verify purity levels as impurities may affect classification under Chapter 29 note (a)
• Check REACH compliance for EU imports and TSCA registration for US customs clearance
Related Products under HTS 2931.49.00
Tributylphosphine
Tributylphosphine (PBu3) is a tertiary phosphine with three butyl groups attached to phosphorus, used in organic synthesis and catalysis. Classified under HTS 2931.49.00 as a non-halogenated organo-phosphorus derivative among other organo-inorganic compounds. Its air-sensitive nature requires stabilizer additions permitted by Chapter 29 note (f).
Triethylphosphite
Triethylphosphite (P(OEt)3) is an organophosphorus ester used in the synthesis of pesticides and flame retardants. It qualifies under HTS 2931.49.00 as a non-halogenated organo-phosphorus derivative, being a separate chemically defined compound per Chapter 29 note (a).
Diphenylphosphinic Acid
Diphenylphosphinic acid (Ph2P(O)OH) features phosphorus bound to two phenyl carbons and oxygen functions. Falls under HTS 2931.49.00 as non-halogenated organo-phosphorus among other organo-inorganic compounds. Used in polymer flame retardants and coordination chemistry.
Tris(2,4-di-tert-butylphenyl)phosphite
This sterically hindered phosphite (CAS 31570-04-4) serves as a secondary antioxidant in polymers. Classified HTS 2931.49.00 as non-halogenated organo-phosphorus derivative per Chapter 29 definitions. Three phenolic groups directly bonded to phosphorus atom.
Dibutyl Phosphite
Dibutyl phosphite (BuO)2P(O)H is a reactive organophosphorus compound used in flame retardants and pesticides. HTS 2931.49.00 covers it as non-halogenated organo-phosphorus derivative. Contains P-C bond through butyl chains and P-H functionality.
Ethyl Diphenylphosphinate
Ethyl diphenylphosphinate (Ph2P(O)OEt) combines phenyl-P-C bonds with ester functionality, used in specialty polymers. Falls under HTS 2931.49.00 as other non-halogenated organo-phosphorus compounds. Chapter 29 note 3(A) directs classification to later numerical heading.