2933.19.30.10/4-Amino-3-methyl-1-phenylpyrazol-5-one Coupler/Germany

4-Amino-3-methyl-1-phenylpyrazol-5-one Coupler from Germany

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.

Duty Rate — Germany → United States

10%

Rate breakdown

9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter

Calculate with your customs value Verify with the Tariff Assistant

Import Tips

• Provide CAS number and spectral analysis confirming pyrazole identity and aromatic substitution to customs for verification

• Declare exact end-use as 'coupler for color negative photographic paper' on entry documents to prevent misclassification

• Watch for contamination thresholds; impurities exceeding chapter note limits may reclassify to mixtures under Chapter 38