2931
4-digit headingOther organo-inorganic compounds
This is a 4-digit heading — a category, not a filing code. Pick the more specific code beneath it that best matches your goods; only a 10-digit statistical code can be used on a customs entry.
Duty rates
No rate is published at this level — check the specific 10-digit statistical code beneath it.
| Rate | Value and what it means |
|---|---|
| General rate (Column 1) | See 10-digit codeColumn 1 general Applies to most trading partners — the standard "normal trade relations" rate. |
| Special rate (Column 1) | —Trade programs The country letters in parentheses are free trade agreement and preference programs. If your goods qualify under one of them, that rate replaces the general rate. |
| Column 2 rate | —Non-NTR Reserved for the small group of countries that do not have normal trade relations with the US (currently Cuba, North Korea, Russia and Belarus). Almost no importer uses this column — if you are shipping from anywhere else, ignore it. |
| Unit of quantity | — How CBP expects the quantity to be reported on the entry summary. |
Codes within Other organo-inorganic compounds
50 more specific lines fall under 2931.
- 2931.10.00.00Tetramethyl lead and tetraethyl lead10-digit statistical codeOther organo-inorganic compounds:3.7%
- 2931.20.00.00Tributyltin compounds10-digit statistical codeOther organo-inorganic compounds:3.7%
- 2931.41.00.00Dimethyl methylphosphonate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.42.00.00Dimethyl propylphosphonate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.43.00.00Diethyl ethylphosphonate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.44.00.00Methylphosphonic acid10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.45.00.00Salt of methylphosphonic acid and (aminoiminomethyl)urea (1:1)10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.46.00.002,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.47.00.00(5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.48.00.003,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane 3,9-dioxide10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.49.00Other8-digit subheadingOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives:3.7%
- 2931.49.00.05O-Alkyl (≤C10, including cycloalkyl) N,N-dialkyl (methyl, ethyl, n-propyl or isopropyl) phosphoramidocyanidates10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 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 thereof10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 2931.49.00.102-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid (glufosinate) and its salts and esters10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 2931.49.00.15Butyl methylphosphinate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 2931.49.00.20N-(Phosphonomethyl) glycine (glyphosate) and its salts and esters10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 2931.49.00.25Bis(1-methylpentyl) methylphosphonate10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other
- 2931.49.00.55Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other > Other:
- 2931.49.00.80Other10-digit statistical codeOther organo-inorganic compounds: > Non-halogenated organo-phosphorous derivatives: > Other > Other:
- 2931.51.00.00Methylphosphonic dichloride10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives:3.7%
- 2931.52.00.00Propylphosphonic dichloride10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives:3.7%
- 2931.53.00.00O-(3-chloropropyl) O-[4-nitro-3-(trifluoromethyl)phenyl] methylphosphonothionate10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives:3.7%
- 2931.54.00.00Trichlorfon (ISO)10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives:3.7%
- 2931.59.00Other8-digit subheadingOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives:3.7%
- 2931.59.00.10O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.15Alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.20O-Isopropyl methylphosphonochloridate10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.25O-Pinacolyl methylphosphonochloridate10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.30P-Alkyl (≤ C10, incl. cycloalkyl) N-(1-(dialkyl (≤ C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.35Methyl- bis(diethylamino)methylene)phosphonamidofluoridate10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.60Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.59.00.80Other10-digit statistical codeOther organo-inorganic compounds: > Halogenated organo-phosphorous derivatives: > Other
- 2931.90Other6-digit headingOther organo-inorganic compounds:
- 2931.90.05.00Diphenyldichlorosilane; and phenyltrichlorosilane10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic:Free
- 2931.90.10.004,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic:6.5%
- 2931.90.15.00Sodium tetraphenylboron10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic:5.8%
- 2931.90.22.00Drugs10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic: > Other:6.5%
- 2931.90.26.00Pesticides10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic: > Other:6.5%
- 2931.90.30.00Products described in additional U.S. note 3 to section VI10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic: > Other: > Other:6.5%
- 2931.90.60.00Other10-digit statistical codeOther organo-inorganic compounds: > Other: > Aromatic: > Other: > Other:6.5%
- 2931.90.70.00N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts10-digit statistical codeOther organo-inorganic compounds: > Other: > Other:Free
- 2931.90.90Other8-digit subheadingOther organo-inorganic compounds: > Other: > Other:3.7%
- 2931.90.90.10Organo-silicon compounds10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other
- 2931.90.90.21Dibutyltin oxide10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other > Organo-tin compounds:
- 2931.90.90.25Tetrabutyltin10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other > Organo-tin compounds:
- 2931.90.90.29Other10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other > Organo-tin compounds:
- 2931.90.90.302-Chlorovinyldichloroarsine10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other
- 2931.90.90.35Bis(2-chlorovinyl)chloroarsine10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other
- 2931.90.90.40Tris(2-chlorovinyl)arsine10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other
- 2931.90.90.52Other10-digit statistical codeOther organo-inorganic compounds: > Other: > Other: > Other
Chapter 29: Organic Chemicals
Browse every code in this chapter to compare neighbouring classifications.
View Chapter 29Source: USITC Harmonized Tariff Schedule, 2026 Basic Edition, Revision 16. Rate text is reproduced verbatim from the official export; category paths and duty estimates are derived.
Data loaded August 18, 2026.Check this chapter on hts.usitc.govReport an error with this codeHow this data is built