HTS Heading 2931

Other organo-inorganic compounds

All 46 HTS codes under heading 2931 (other organo-inorganic compounds), with their duty rates from the 2026 HTS Revision 23. General duty Free to 6.5%.

Every line of heading 2931

  • 2931 Other organo-inorganic compounds.
  • 2931.10.00.00 Tetramethyl lead and tetraethyl lead (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.20.00.00 Tributyltin compounds (under: Other organo-inorganic compounds) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.41.00.00 Dimethyl methylphosphonate (under: Non-halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.42.00.00 Dimethyl propylphosphonate (under: Non-halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.43.00.00 Diethyl ethylphosphonate (under: Non-halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.44.00.00 Methylphosphonic acid (under: Non-halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.45.00.00 Salt of methylphosphonic acid and (aminoiminomethyl)urea (1:1) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.46.00.00 2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.47.00.00 (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.48.00.00 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane 3,9-dioxide (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.49.00 Other (under: Non-halogenated organo-phosphorous derivatives): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.49.00.05 O-Alkyl (≤C10, including cycloalkyl) N,N-dialkyl (methyl, ethyl, n-propyl or isopropyl) phosphoramidocyanidates (kg).
  • 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 (kg).
  • 2931.49.00.10 2-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid (glufosinate) and its salts and esters (kg).
  • 2931.49.00.15 Butyl methylphosphinate (under: Other) (kg).
  • 2931.49.00.20 N-(Phosphonomethyl) glycine (glyphosate) and its salts and esters (kg).
  • 2931.49.00.25 Bis(1-methylpentyl) methylphosphonate (kg).
  • 2931.49.00.55 Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms (kg).
  • 2931.49.00.80 Other (under: Other) (kg).
  • 2931.51.00.00 Methylphosphonic dichloride (under: Halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.52.00.00 Propylphosphonic dichloride (under: Halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.53.00.00 O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.54.00.00 Trichlorfon (ISO) (under: Halogenated organo-phosphorous derivatives) (kg): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.59.00 Other (under: Halogenated organo-phosphorous derivatives): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.59.00.10 O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates (kg).
  • 2931.59.00.15 Alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides (kg).
  • 2931.59.00.20 O-Isopropyl methylphosphonochloridate (kg).
  • 2931.59.00.25 O-Pinacolyl methylphosphonochloridate (kg).
  • 2931.59.00.30 P-Alkyl (≤ C10, incl. cycloalkyl) N-(1-(dialkyl (≤ C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts (kg).
  • 2931.59.00.35 Methyl- bis(diethylamino)methylene)phosphonamidofluoridate (kg).
  • 2931.59.00.60 Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms (kg).
  • 2931.59.00.80 Other (under: Other) (kg).
  • 2931.90 Other (under: Other organo-inorganic compounds).
  • 2931.90.05.00 Diphenyldichlorosilane; and phenyltrichlorosilane (kg): General Free; Special none; Column 2 15.4¢/kg + 68.5%.
  • 2931.90.10.00 4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester (kg): General 6.5%; Special Free (A+, AU, BH, CL,CO,D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG); Column 2 15.4¢/kg + 40%.
  • 2931.90.15.00 Sodium tetraphenylboron (under: Aromatic) (kg): General 5.8%; Special Free (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG); Column 2 15.4¢/kg + 40%.
  • 2931.90.22.00 Drugs (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 67.5%.
  • 2931.90.26.00 Pesticides (under: Other) (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2931.90.30.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 68.5%.
  • 2931.90.60.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 68.5%.
  • 2931.90.70.00 N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts (kg): General Free; Special none; Column 2 25%.
  • 2931.90.90 Other (under: Other): General 3.7%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2931.90.90.10 Organo-silicon compounds (under: Other) (kg).
  • 2931.90.90.21 Dibutyltin oxide (under: Organo-tin compounds) (kg).
  • 2931.90.90.25 Tetrabutyltin (under: Organo-tin compounds) (kg).
  • 2931.90.90.29 Other (under: Organo-tin compounds) (kg).
  • 2931.90.90.30 2-Chlorovinyldichloroarsine (under: Other) (kg).
  • 2931.90.90.35 Bis(2-chlorovinyl)chloroarsine (kg).
  • 2931.90.90.40 Tris(2-chlorovinyl)arsine (under: Other) (kg).
  • 2931.90.90.52 Other (under: Other) (kg).

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.