Other lactams
Heterocyclic compounds with nitrogen hetero-atom(s) only. > Lactams: > Other lactams > Other lactams
Duty Rate (from China)
Products classified under Tariff item 2933.79.00.00
1,8-Naphthalimide
1,8-Naphthalimide is an aromatic lactam with a fused naphthalene ring system and a nitrogen-containing imide group. It is used in fluorescent dyes and classified under 'Other lactams'.
2933.79.001-Methyl-2-pyrrolidinone (NMP)
1-Methyl-2-pyrrolidinone (NMP) is a five-membered lactam ring compound with a nitrogen hetero-atom and a methyl group on the nitrogen. It is a separate chemically defined organic compound, classified under tariff item 2933.79.00 as 'Other lactams' because it is not specifically enumerated elsewhere in the heading.
2933.79.002-Pyrrolidone (2-Pyrrolidinone)
2-Pyrrolidone (2-Pyrrolidinone) is a five-membered lactam ring compound with a single nitrogen hetero-atom. It serves as a chemical intermediate for synthesizing pharmaceuticals and agrochemicals, classified under 'Other lactams'.
2933.79.002-Pyrrolidone Aromatic Ester
2-Pyrrolidone Aromatic Ester is an ester derivative of 2-pyrrolidone with aromatic modification, used in pharmaceutical formulations. As a separate chemically defined lactam compound, it is classified under tariff item 2933.79.00 for 'Other lactams'.
2933.79.002-Pyrrolidone Polymer Intermediate
Bulk 2-pyrrolidone, a five-membered heterocyclic lactam, is a chemically defined organic compound used as an intermediate in the synthesis of polyvinylpyrrolidone (PVP). Its role as a chemical intermediate does not alter its classification as an enumerated lactam under this tariff item.
2933.79.006-Acetamidohexanoic Acid
6-Acetamidohexanoic acid is a chemically defined organic compound featuring a lactam ring structure with a nitrogen hetero-atom. It is used as an intermediate in the synthesis of pharmaceuticals and falls under the 'Other lactams' tariff item.
2933.79.00Caprolactam Modified with Aromatic Groups
Caprolactam modified with aromatic groups is a lactam derivative used as an intermediate in the production of specialty nylon-6 with enhanced properties. It contains a nitrogen hetero-atom in a cyclic amide structure, qualifying it under 'Other lactams'.
2933.79.00Diketopyrrolopyrrole Orange Pigment PO-73
Diketopyrrolopyrrole Orange Pigment PO-73 is a pure, chemically defined heterocyclic compound with a nitrogen hetero-atom, specifically a lactam structure. It is classified under tariff item 2933.79.00 as 'Other lactams' because it is not specifically enumerated elsewhere in the heading and meets the Chapter 29 criteria for separate chemically defined organic compounds.
2933.79.00Diketopyrrolopyrrole Red Pigment DPP Red 20
Diketopyrrolopyrrole Red Pigment DPP Red 20 is a pure synthetic organic pigment with a lactam ring structure containing nitrogen hetero-atoms. As a separate chemically defined compound, it falls under tariff item 2933.79.00 for 'Other lactams' in Chapter 29.
2933.79.00Distilled N-Vinyl-2-Pyrrolidone Monomer
Vacuum-distilled N-vinyl-2-pyrrolidone (NVP) monomer with water content below 0.1% is a pure heterocyclic lactam. It is used for high-end PVP production in contact lenses and biomedical applications, and falls under this tariff item as a named compound.
2933.79.00DPP Red Automotive Metallic Pigment
DPP Red Automotive Metallic Pigment is a pure diketopyrrolopyrrole pigment with a lactam structure, used in automotive clearcoats for metallic effects. It qualifies as a separate chemically defined heterocyclic compound under tariff item 2933.79.00, as it is not specifically named elsewhere in the heading.
2933.79.00DPP Red BT Pigment for Automotive Coatings
DPP Red BT Pigment for Automotive Coatings is a benzimidazolone-substituted diketopyrrolopyrrole pigment, a pure heterocyclic lactam compound. It is classified under tariff item 2933.79.00 as 'Other lactams' because it is a separate chemically defined organic compound with nitrogen hetero-atoms.
2933.79.00DPP Red Fiber Grade Pigment
DPP Red Fiber Grade Pigment is a low-dusting diketopyrrolopyrrole red pigment used for spin dyeing synthetic fibres. As a pure chemically defined lactam compound, it falls under tariff item 2933.79.00 for 'Other lactams' in Chapter 29.
2933.79.00DPP Red Masterbatch Base Pigment
DPP Red Masterbatch Base Pigment is an ultra-fine diketopyrrolopyrrole red pigment powder used as a base for masterbatches. It is a pure chemically defined heterocyclic lactam compound, classified under tariff item 2933.79.00 as 'Other lactams'.
2933.79.00DPP Scarlet Pigment PR-272
DPP Scarlet Pigment PR-272 is a diketopyrrolopyrrole pigment variant with a lactam structure, modified for heat stability in engineering plastics. As a separate chemically defined compound, it is classified under tariff item 2933.79.00 for 'Other lactams'.
2933.79.00DPP Yellowish Red Pigment for Plastics
DPP Yellowish Red Pigment for Plastics is a maroon-red diketopyrrolopyrrole pigment optimized for polyolefin masterbatch colouring. It is a pure chemically defined lactam compound, falling under tariff item 2933.79.00 as 'Other lactams'.
2933.79.00Eco-Friendly DPP Red Pigment
Eco-Friendly DPP Red Pigment is a low-VOC diketopyrrolopyrrole red pigment, compliant with BlueSign standards, used in sustainable coatings. As a pure chemically defined lactam compound, it is classified under tariff item 2933.79.00 for 'Other lactams'.
2933.79.00Epsilon-Caprolactam Aromatic Derivative
Epsilon-caprolactam aromatic derivative acts as a stabilizer in polymer processing. It is a lactam compound with a nitrogen hetero-atom and aromatic substitution, classified under 'Other lactams'.
2933.79.00Glutaramide
Glutaramide is a modified six-membered lactam ring compound used in pharmaceutical and agrochemical synthesis. It contains a nitrogen hetero-atom and falls under 'Other lactams'.
2933.79.00High-Chroma DPP Violet Pigment PV-32
High-Chroma DPP Violet Pigment PV-32 is a diketopyrrolopyrrole pigment with a lactam structure, used in digital printing inks. It is a pure chemically defined heterocyclic compound, classified under tariff item 2933.79.00 as 'Other lactams'.
2933.79.00High-Strength DPP Red Ink Pigment
High-Strength DPP Red Ink Pigment is a high-tinting strength diketopyrrolopyrrole red pigment for flexographic printing inks. As a pure chemically defined lactam compound, it falls under tariff item 2933.79.00 for 'Other lactams'.
2933.79.00Indolactam Intermediate
Indolactam intermediate features a fused indole-lactam structure used in alkaloid synthesis. It is a heterocyclic compound with a nitrogen hetero-atom, classified as an 'Other lactam'.
2933.79.00Industrial 2-Pyrrolidone with Stabilizer
Industrial 2-pyrrolidone with added stabilizers for transport and preservation remains a chemically defined lactam. Per Chapter 29 note (f), the addition of a stabilizer necessary for preservation or transport does not remove it from classification under this tariff item.
2933.79.00Isoindole-1,3-dione
Isoindole-1,3-dione, a structural isomer of phthalimide, is an aromatic fused-ring lactam with a nitrogen hetero-atom. It is used in resins and dyes, classified under 'Other lactams'.
2933.79.00Maleimide
Maleimide is an unsaturated five-membered aromatic lactam with a nitrogen hetero-atom, used in polymer chemistry and Diels-Alder reactions. It falls under 'Other lactams'.
2933.79.00N-Acetyl-2-Pyrrolidone
N-Acetyl-2-pyrrolidone is a chemically defined acetylated lactam used as a solvent and chemical intermediate. It contains a nitrogen hetero-atom in a five-membered ring, falling under 'Other lactams'.
2933.79.00Naphthol DPP Red Blend Base
Naphthol DPP Red Blend Base is a binary pigment preparation using a DPP core blended with naphthol AS, imported as a pure chemical for shade matching. It is classified under tariff item 2933.79.00 as 'Other lactams' because the DPP component is a lactam, but the blend may affect classification.
2933.79.00N-Methyl-2-Pyrrolidone (NMP)
N-Methyl-2-pyrrolidone (NMP) is a polar aprotic solvent with a five-membered heterocyclic ring containing a nitrogen hetero-atom and an amide functionality, classifying it as a lactam. It is a separate chemically defined organic compound under this tariff item.
2933.79.00NMP Electronic Grade Solvent
High-purity NMP for semiconductor manufacturing is the same chemically defined heterocyclic lactam as industrial-grade NMP. End-use purity does not affect tariff classification under this item.
2933.79.00NMP Paint Stripper Base (Pure)
Pure NMP imported for methylene chloride-free paint stripper formulations remains a chemically defined compound. Despite its common application in paint removal, it is classified as a lactam under this tariff item.
2933.79.00N-Phenyl-2-Pyrrolidone
N-Phenyl-2-pyrrolidone is an aromatic lactam with a phenyl group attached to the nitrogen atom of the pyrrolidone ring. It is used in dye synthesis and pharmaceuticals, classified under 'Other lactams'.
2933.79.00N-Phenylphthalimide
N-Phenylphthalimide is a modified aromatic lactam where the nitrogen of phthalimide is substituted with a phenyl group. It maintains a heterocyclic nitrogen-only structure, classified under 'Other lactams'.
2933.79.00N-Vinyl-2-Pyrrolidone Monomer (NVP)
N-vinyl-2-pyrrolidone (NVP) is a heterocyclic lactam monomer with a vinyl group attached to the nitrogen atom of the 2-pyrrolidone ring. It is used primarily in the production of polyvinylpyrrolidone (PVP) polymers and is classified under this tariff item.
2933.79.00NVP Monomer with MEHQ Inhibitor
N-vinyl-2-pyrrolidone monomer inhibited with monomethyl ether hydroquinone (MEHQ) at 250 ppm for stability in adhesive and coating applications. The inhibitor is added for preservation, which is permitted under Chapter 29 note (f).
2933.79.00Pharma-Grade N-Methyl-2-Pyrrolidone USP
Pharmaceutical-grade NMP meeting USP standards is the same chemically defined lactam as industrial NMP. Higher purity specifications do not change its fundamental chemical classification under this tariff item.
2933.79.00Pharma-Grade N-Vinyl-2-Pyrrolidone Monomer
High-purity N-vinyl-2-pyrrolidone monomer (>99.9%) for pharmaceutical PVP production, meeting USP/EP standards as a heterocyclic nitrogen lactam. Its chemical definition fits Chapter 29 precisely, and it is classified under this tariff item.
2933.79.00Phthalimide
Phthalimide is an aromatic heterocyclic lactam compound derived from phthalic anhydride, featuring a five-membered ring with a nitrogen hetero-atom fused to a benzene ring. It falls under 'Other lactams'.
2933.79.00Quinolactam Derivative
Quinolactam derivative represents a fused aromatic lactam used in medicinal chemistry. It contains a nitrogen hetero-atom in a lactam ring fused to an aromatic system, classified under 'Other lactams'.
2933.79.00Succinimide
Succinimide is a cyclic imide (lactam) with a five-membered heterocyclic ring containing nitrogen, derived from succinic anhydride. It is classified under 'Other lactams'.
2933.79.00Transparent DPP Red Pigment for Wood Coatings
Transparent DPP Red Pigment for Wood Coatings is a naphthol-modified diketopyrrolopyrrole red pigment providing transparent stain effects. As a pure chemically defined lactam compound, it is classified under tariff item 2933.79.00 for 'Other lactams'.