Fast Yellow Base GC
Fast Yellow Base GC, an aniline-based fast color base, diazotizes rapidly for coupling with naphthol AS to yield bright, fast yellow-orange shades on textiles. Its salt form ensures stability during transport and processing. HTS 2921.42.55.00 classification reflects its role as an aromatic monoamine derivative for colorfast azoic dyeing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as reactive dye intermediate for direct fiber reaction
Reactive dyes containing amine functions classify in Chapter 32, not as pure Chapter 29 organic compounds.
If for photographic chemistry applications rather than textile dyeing
Same chemical may use earlier fast base subheading if primary function differs from textile color base.
If when finished and put up for retail finishing preparations
Dyeing assistants or finishing agents containing these bases classify under Chapter 38 if prepared for specific application.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Submit manufacturer's specifications confirming CAS number and purity >98% to distinguish from impure mixtures excluded by Chapter Note 2(a)
• Document end-use as dye intermediate only; retail dye preparations trigger Chapter 32 reclassification
• Check for anti-dusting agents; allowable per Note 2(g) if solely for safety/identification without specific use adaptation
Related Products under HTS 2921.42.55.00
Fast Red Base B
Fast Red Base B is an aniline-derived aromatic monoamine salt specifically formulated as a fast color base for azoic dyeing processes. It couples with naphthol AS to produce brilliant, lightfast red shades on cotton and viscose fabrics. Classified under HTS 2921.42.55.00 as a derivative of aniline used primarily in dye manufacturing for its amine-function chemistry.
Fast Blue Base BN
Fast Blue Base BN is a diazotizable aniline derivative salt serving as a fast color base for naphthol coupling in ice dye processes. It produces navy blue shades with excellent wash and light fastness on cellulosic fibers. Falls under HTS 2921.42.55.00 due to its aromatic amine-function structure optimized for stable azoic color development.
Fast Scarlet Base B
Fast Scarlet Base B is a specialized aniline salt fast color base that produces scarlet red hues when coupled with beta-naphthol in azoic dyeing systems. It offers superior alkali and chlorine fastness for workwear fabrics. As a pure aromatic monoamine derivative, it properly falls under HTS 2921.42.55.00.
Fast Black Base N
Fast Black Base N, derived from aromatic monoamines, serves as a diazo component for deep black shades in naphthol dyeing with excellent all-around fastness properties. Primarily used for denim and khaki fabrics. Classifies under HTS 2921.42.55.00 as an aniline derivative fast color base per Chapter 29 amine-function provisions.