Pyrazolone Red Dye Intermediate
Specialty pyrazolone for coupling component in photographic mask dyes and color correction layers. Aromatic modification qualifies under HTS 2933.19.30 as photographic chemical with unfused pyrazole. Used in motion picture color negative processing.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for textile or ink dye production
Identical pyrazolone chemistry for non-photographic dyes falls under Chapter 32.
If containing sulfur functions
Organo-sulfur pyrazole derivatives classify under heading 2930.
If as prepared dye coupler solution
Solvent-dissolved for safety/transport shifts to chemical preparations.
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Import Tips & Compliance
• Colorimetric specifications and coupling reaction data support photographic chemical status
• Small quantity imports (<5kg) typical; bulk suggests non-specialty use risking reclassification
• Ensure INCI/CAS naming consistency to prevent disputes with dye industry classifications
Related Products under HTS 2933.19.30
4-Methyl-1-phenyl-3-pyrazolone
This is a pyrazole derivative used as a key intermediate in the synthesis of pyrazolone dyes for color photographic films and papers. Its aromatic pyrazole ring structure qualifies it under HTS 2933.19.30 as a photographic chemical containing an unfused pyrazole ring. The compound reacts with diazonium salts to form azo dyes essential for color development processes.
5-Methyl-1-phenyl-3-pyrazolone
A modified aromatic pyrazolone used in magenta coupler synthesis for color negative films like Kodak Vision stocks. Falls under HTS 2933.19.30 due to its unfused pyrazole ring and specific photographic chemical application. Essential for forming stable dye images during color development.
2,4-Diamino-6-pyrazolone
Diaminopyrazolone derivative used as stabilizer in color photographic emulsions. Its unfused pyrazole ring with amino substitutions fits HTS 2933.19.30 photographic chemicals. Prevents dye fading in processed color films.
1-Phenyl-5-methyl-3-pyrazolone
Pyrazolone coupler intermediate for cyan dye formation in color reversal films. Aromatic pyrazole structure under HTS 2933.19.30 as photographic chemical. Critical for E-6 process transparency films.
1-Phenyl-3-pyrazolidinone (Phenidone)
Phenidone is a pyrazolidinone derivative serving as a superadditive developing agent in black-and-white photographic film development. Its unfused pyrazolone ring structure places it under HTS 2933.19.30 as a photographic chemical. It accelerates silver halide reduction when combined with metol or hydroquinone.
3-Methyl-1-phenyl-5-pyrazolone
Pyrazolone derivative employed in yellow coupler formulations for photographic color papers and films. Its aromatic structure with unfused pyrazole ring qualifies under HTS 2933.19.30 as photographic chemical. Couples with oxidized developer to produce yellow image dyes.