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Other organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > 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

2931.49.00.05O-Alkyl (≤C10, including cycloalkyl) N,N-dialkyl (methyl, ethyl, n-propyl or isopropyl) phosphoramidocyanidates
→
2931.49.00.08[O-2-(Dialkyl (methyl, ethyl, n-propyl or isopropyl) amino)ethyl] hydrogen alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonites and their O-alkyl (≤C10, including cycloalkyl) esters; alkylated or protonated salts thereof
→
2931.49.00.102-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid (glufosinate) and its salts and esters
→
2931.49.00.15Butyl methylphosphinate
→
2931.49.00.20N-(Phosphonomethyl) glycine (glyphosate) and its salts and esters
→
2931.49.00.25Bis(1-methylpentyl) methylphosphonate
→
2931.49.00.55Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms
→
2931.49.00.80Other
→
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Products classified under HTS 2931.49.00

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.

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.