Potassium Hydroquinone Disulfonate
Potassium hydroquinone disulfonate, an inorganic salt of hydroquinone per Chapter 29 Note 5(C), is classified under HTS 2907.22.5000 'other.' Used in photographic processing as a stable developer component resistant to aerial oxidation.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If misclassified as inorganic salt without organic parent
Chapter 28 covers inorganic salts; organic salts with phenolic parent classified with organic compound per Note 5(C).
If imported as sensitized photographic chemical preparation
Salts formulated specifically for sensitized photographic uses fall under Chapter 37 heading 3707.
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Import Tips & Compliance
• Classify as hydroquinone salt per Chapter Note 5(C)(1); provide salt formation chemistry and counterion analysis
• Declare water solubility and photographic end-use to distinguish from general chemical hydroquinone
• Include batch assay confirming sulfonate substitution pattern matching hydroquinone parent structure
Related Products under HTS 2907.22.50.00
Hydroquinone USP Grade
Hydroquinone USP is a high-purity polyphenol classified under HTS 2907.22.5000 as 'other' hydroquinone and its salts, meeting United States Pharmacopeia standards for pharmaceutical applications. It is used primarily in skin lightening creams and depigmentation treatments due to its ability to inhibit melanin production.
Hydroquinone Monomethyl Ether (HQMME)
Hydroquinone monomethyl ether, a substituted polyphenol derivative, falls under HTS 2907.22.5000 as 'other' hydroquinone compounds. Primarily used as a polymerization inhibitor in acrylic resins, adhesives, and UV-curable coatings to prevent premature curing during storage and transport.
4-Methoxyphenol (Hydroquinone Monomethyl Ether Technical Grade)
Technical grade 4-methoxyphenol is a hydroquinone derivative captured under HTS 2907.22.5000 'other' category for polyphenols. Widely used in chemical synthesis as an intermediate for antioxidants, pharmaceuticals, and polymer stabilizers.
Hydroquinone Technical Grade 99%
Hydroquinone technical grade 99% purity is classified under HTS 2907.22.5000 as 'other' hydroquinone, suitable for industrial applications including photographic developers and rubber antioxidants. This polyphenol compound inhibits oxidation in various manufacturing processes.
Hydroquinone with Stabilizer (0.02% NaOH)
Hydroquinone containing 0.02% sodium hydroxide stabilizer falls under HTS 2907.22.5000 per Chapter Note 1(f) for added stabilizers necessary for preservation. The minimal stabilizer prevents oxidation during transport without rendering suitable for specific use.