Photographic chemicals
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: > Other: > Other: > Aromatic or modified aromatic: > Other: > Photographic chemicals
Duty Rate (from China)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2934.99.20.00
4-Phenylphenol
4-Phenylphenol is an aromatic heterocyclic compound used as a key photographic chemical in the development of silver halide films and papers. It functions as a developing agent or auxiliary in photographic processing solutions due to its aromatic structure and chemical reactivity. Classified under HTS 2934.99.20.00 as an aromatic photographic chemical.
1-Phenyl-3-pyrazolidinone (Phenidone)
Phenidone is a pyrazolone derivative serving as a superadditive developing agent in black-and-white photographic developers. This aromatic heterocyclic compound accelerates silver halide reduction while minimizing fog formation. HTS 2934.99.20.00 covers it specifically as a photographic chemical.
Sodium 4-Methylbenzenesulfinate
This aromatic sulfinic acid salt serves as a photographic chemical in fixing baths and bleach regeneration processes. It functions as a sulfinate source in silver halide processing chemistry. Falls under HTS 2934.99.20.00 as an aromatic heterocyclic photographic chemical.
2,4-Diaminophenol Dihydrochloride (Rodinal Developer)
Used in high-acutance photographic developers like Rodinal, this aromatic compound reduces silver halides while providing fine grain structure. Its diaminophenol structure makes it ideal for aerial and technical film processing. Classified as aromatic photographic chemical under HTS 2934.99.20.00.
Triethanolamine Hydroxyhydroquinone
TEHQ serves as a silver halide preservative and stabilizer in photographic emulsions and developers. This aromatic derivative prevents oxidation during film storage and processing. HTS 2934.99.20.00 specifically includes such photographic stabilizers.
p-Aminophenol Hydrochloride
Classic photographic developing agent used in metol-hydroquinone developers for fine grain films. The para-amino structure provides controlled silver reduction rates. Aromatic photographic chemical under HTS 2934.99.20.00.
Hydroquinone Monomethyl Ether (MEHQ)
MEHQ inhibits polymerization in photographic gelatin emulsions and serves as an antioxidant in developer solutions. This methoxyhydroquinone derivative stabilizes aromatic compounds during processing. Classified under HTS 2934.99.20.00.
1-Naphthol
Aromatic coupler used in color photographic development for magenta dye formation. Reacts with oxidized developing agents to produce color images in chromogenic films. HTS 2934.99.20.00 includes such color coupling chemicals.
2,4-Dichlorophenol
Chlorinated aromatic used in photographic bleach-fix solutions and as a biocide in processing tanks. Provides antimicrobial protection while participating in silver complexing reactions. Aromatic photographic chemical per HTS 2934.99.20.00.
Benzotriazole
Benzotriazole prevents corrosion of processing equipment and acts as a silver image stabilizer in photographic films. This triazole derivative chelates metal ions in developer solutions. Classified as aromatic photographic chemical HTS 2934.99.20.00.