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.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If derivative of 3,5-pyrazolidinedione rather than simple pyrazolone
Specific pyrazolidinedione photographic chemicals have separate statistical breakout.
If imported as prepared photo lab reagent kit component
Mixtures for laboratory photo processing shift to Chapter 38 chemical preparations.
If incorporated into silver halide emulsions
Photographic sensitized materials containing pyrazolones classify under Chapter 37.
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Import Tips & Compliance
• Provide CAS number (1892-67-1) and IUPAC name consistency across shipping documents
• Include batch certificates showing low heavy metal content required for photo-grade chemicals
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.
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.