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.
Import Duty Rates by Country of Origin
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 not specifically used in photographic applications
General aromatic pyrazoles without documented photographic chemical use fall under the residual 'other' subheading.
If imported as finished synthetic azo dye rather than dye intermediate
Completed pyrazolone-based dyes for photographic use are classified as synthetic organic coloring matter in Chapter 32.
If imported as mixture with developers/fixers for photo processing
Diagnostic or laboratory reagents containing pyrazoles may shift to Chapter 38 if prepared as ready-to-use solutions.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide detailed chemical analysis certificates confirming pyrazole structure and aromatic modification to avoid reclassification under general pyrazole headings
• Include end-use documentation specifying photographic dye applications to justify the 'photographic chemicals' provision
• Ensure proper Hazard Communication labeling (HazMat) as it may be classified as an irritant; common pitfall is insufficient safety data sheets
Related Products under HTS 2933.19.30
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.
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.
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.