Ballasted Pyrazole Magenta Coupler CP-1
Ballasted aromatic pyrazole coupler (similar to CP-1 analogs) with long-chain alkyl groups for oil-form dispersion in color negative photographic paper. Falls under HTS 2933.19.30.10 as a modified aromatic pyrazole specifically for photographic color paper coupler applications. The ballast prevents dye migration in processed prints.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-incorporated into sensitized photographic paper
When the coupler is already emulsified in finished sensitized paper, it classifies as prepared photographic product under Chapter 37.
If containing fused pyridine ring instead of unfused pyrazole
Pyridine-based couplers fall under different heterocyclic nitrogen heading within the same chapter.
If imported as coupler dispersion in gelatin for direct emulsion use
Prepared dispersions constitute photographic chemical preparations rather than pure compounds.
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Import Tips & Compliance
• Submit emulsion compatibility test data proving use in color negative paper to support specific subheading classification
• Ensure stabilizer additives comply with chapter note 1(f); excess may trigger reclassification as preparations
Related Products under HTS 2933.19.30.10
4-Amino-3-methyl-1-phenylpyrazol-5-one Coupler
A specific aromatic pyrazolone coupler (CAS 104-26-7 variant) designed for magenta dye formation in color negative photographic paper emulsions. Classified under HTS 2933.19.30.10 due to its unfused pyrazole ring structure and exclusive application in photographic color paper processing. It couples with color developer to produce stable dye images upon silver halide development.
3,3-Dichloro-1-phenylpyrazole Coupler
Halogenated aromatic pyrazole coupler for high-stability magenta imaging in color negative photographic paper, per chapter note on halogenated derivatives. Classified in HTS 2933.19.30.10 for its unfused pyrazole structure and designated photographic paper application. The dichloro substitution enhances light fastness of developed dyes.
Pyrazolone Color Coupler for Photographic Paper
This is a pyrazole-based heterocyclic compound used as a color coupler in color negative photographic paper, reacting with oxidized developer to form magenta dye images during processing. It falls under HTS 2933.19.30.10 as an aromatic pyrazole derivative specifically designated for photographic chemical applications in color negative paper. The chemical structure contains an unfused pyrazole ring essential for its coupling function in silver halide emulsions.
Photographic Pyrazole Coupler for RA-4 Paper
Specialized pyrazole coupler optimized for RA-4 color negative paper processing systems, forming magenta dyes with rapid-access chemistry. HTS 2933.19.30.10 applies to this aromatic heterocyclic compound due to its pyrazole ring and specific designation for color negative photographic paper. Ensures high-quality prints with neutral magenta reproduction.