Naphthol AS-D Dye Intermediate
Naphthol AS-D (C.I. Azoic Coupling Component 3) is an aromatic cyclic amide derivative used as a coupling component in the synthesis of azo dyes for textile coloration. It falls under HTS 2924.29.36.00 as a naphthol AS derivative with carboxyamide-function, classified among aromatic cyclic amides other than the base naphthol AS. This chemically defined organic compound is essential for producing vibrant, fast dyes on cotton and other fibers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-dissolved or formulated as synthetic azo dye coupler for retail
Formulations ready for dye use shift to Chapter 32 synthetic organic coloring matter, excluding pure chemical intermediates.
If imported as mixture with solvents or stabilizers beyond Chapter 29 allowances
Exceeds Chapter 29 scope for solutions/additives if not solely for safety/transport, falling to chemical preparations.
If reclassified due to predominant phenolic structure over amide function
Material composition emphasis on phenolic OH group could place it under aromatic alcohols, phenols if amide not principal.
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Import Tips & Compliance
• Verify purity certificates and chemical analysis to confirm classification as a naphthol AS derivative under Chapter 29 note (a)
• Provide Safety Data Sheets (SDS) and ensure packaging meets UN standards for hazardous organic chemicals during transport
• Avoid misclassification as finished dyes (Chapter 32); include lab test results showing it's a dye intermediate
Related Products under HTS 2924.29.36.00
Naphthol AS-OL Azoic Dye Intermediate
Naphthol AS-OL serves as a key aromatic cyclic carbamate derivative in azoic dyeing systems, providing orange hues on cotton yarns and fabrics. It qualifies for HTS 2924.29.36.00 as an 'other' naphthol AS derivative under cyclic amides heading per Chapter 29 definitions. Primarily used by textile manufacturers for on-piece dyeing applications.
Naphthol AS-TR Dye Base
Naphthol AS-TR is an aromatic cyclic amide derivative serving as a stable base for red azo pigments in printing inks and textiles. It is classified in HTS 2924.29.36.00 as 'other' naphthol AS derivatives with carboxyamide function, per Chapter 29's organic compound definitions. Widely used in high-fastness color formulations.
Naphthol AS-PH Phenolamide Dye Intermediate
This naphthol AS derivative incorporates phenolic-amide functionality for fast dyeing on synthetic blends, classified as HTS 2924.29.36.00 'other' aromatic cyclic amides. Meets Chapter 29 criteria for chemically defined compounds used in pigment and ink production. Provides superior lightfastness in end applications.
Naphthol AS-BS Dye Coupling Agent
Naphthol AS-BS is a derivative of naphthol AS, featuring an aromatic cyclic amide structure modified for enhanced coupling in ice dyeing processes for cellulosic fabrics. Classified under HTS 2924.29.36.00 as an 'other' aromatic naphthol AS derivative with carboxyamide function. It enables production of scarlet-red shades in textile dyeing industries.
Naphthol AS-SD Fast Scarlet Intermediate
This naphthol AS derivative (Naphthol AS-SD) is a carboxyamide-function compound used to produce fast scarlet dyes via diazotization coupling on fabrics. HTS 2924.29.36.00 covers it as an aromatic 'other' naphthol AS derivative, aligning with Chapter 29's focus on chemically defined cyclic amides. Essential for pigment printing in apparel manufacturing.
Naphthol AS-LC Coupling Component
Naphthol AS-LC, a derivative with specific carboxyamide substitution, acts as a coupling agent for brilliant lake red dyes on wool and silk. Falls under HTS 2924.29.36.00 as an aromatic cyclic amide other than base naphthol AS. Its chemical purity suits industrial dye synthesis per Chapter notes.