Heading 2929

Compounds with other nitrogen function

18 declarable lines

Heading 2929 covers compounds with other nitrogen function, mainly isocyanates and cyanate esters. It splits into a subheading for isocyanates (2929.10), broken out by specific named chemicals such as TDI, MDI and HDI, and a residual subheading (2929.90) for other nitrogen-function compounds, split by aromatic versus other and by named phosphoramidic and phosphoramidate chemicals. Most lines carry a 6.5% general (MFN) rate, with a few at 5.8% or free.

Products in this heading

Toluene diisocyanate (TDI) used to make flexible polyurethane foam
Mixtures of 2,4- and 2,6-toluenediisocyanate sold as an 80/20 blend
Methylenedi-p-phenylene isocyanate (MDI) for rigid foam and insulation panels
1,6-Hexamethylene diisocyanate (HDI) for automotive and industrial coatings
Polymeric MDI mixtures for binders and adhesives
Cyclohexyl isocyanate, a specialty isocyanate intermediate
Xylene diisocyanate for specialty polymers
Cyanate ester resins such as 2,2-bis(4-cyanatophenyl)propane for circuit laminates

How to choose the right subheading

Whether the compound is an isocyanate (subheading 2929.10) or another nitrogen-function compound (subheading 2929.90).
Whether the chemical is one of the specifically named compounds in the statistical lines or falls to an other line.
For isocyanates, whether the product is an unmixed chemical or a mixture of the 2,4- and 2,6- isomers.
For 2929.90, whether the compound is aromatic or non-aromatic, and whether it is a named phosphoramidic or phosphoramidate chemical.
Whether the product is described in additional U.S. note 3 to section VI, which has its own line.

Often confused with

Amine-function compounds such as aniline
Amines are classified by amine function, not as isocyanates.
Heading 2921
Urea and other amide-function compounds of carbonic acid
Carboxyamide and carbonic acid amide functions fall in 2924.
Heading 2924
Nitrile-function compounds such as acrylonitrile
A nitrile group is covered by heading 2926, not 2929.
Heading 2926
Other organo-inorganic compounds such as phosphoric esters
Many organo-inorganic compounds sit in 2931 rather than 2929.
Heading 2931
Heterocyclic compounds with nitrogen hetero-atom only
A nitrogen ring structure places the product in 2933.
Heading 2933

Frequently asked questions

What is the HTS code for toluene diisocyanate?

Unmixed toluenediisocyanate is 2929.10.10.00 at a general (MFN) rate of 6.5%. A mixture of the 2,4- and 2,6- isomers is 2929.10.15.00, also 6.5%.

What is the duty on MDI?

Methylenedi-p-phenylene isocyanate (MDI) is classified under 2929.10.80.10 with a general (MFN) rate of 6.5%.

How do I classify hexamethylene diisocyanate?

1,6-Hexamethylene diisocyanate has its own line, 2929.10.35.00, and pays a general (MFN) rate of 6.5%.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.