Pyrogallol Technical Grade Crystals
Technical grade pyrogallic acid crystals (C6H3(OH)3) are chemically defined polyphenols under HTS 2907.29.10.00. These are supplied as free-flowing crystals with anticaking agents for safe transport, meeting Chapter 29 note (f). Primarily used in oxygen absorption indicators and hair dye intermediates.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If lower purity (<95%) or mixed with other polyphenols
Purity below technical grade specification moves to 'other' polyphenols subheading.
If when supplied as hair dye intermediate with added preparative substances
Preparations for hair coloring exclude from Chapter 29 per note exclusions.
If complexed with inorganic metals for organo-inorganic applications
Metal coordination compounds classified by latest numerical heading per note 5(C)(3).
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Import Tips & Compliance
• Include stabilizer composition in commercial invoice; anticaking agents must be declared per Chapter note (f)
• Obtain prior EPA notification if for dye manufacturing; TSCA registration required for new importers
• Check for anti-dusting agent additions; excess may trigger reclassification from pure compound
Related Products under HTS 2907.29.10.00
Pyrogallic Acid (Pyrogallol) Powder
Pyrogallic acid, also known as pyrogallol, is a trihydroxybenzene (1,2,3-trihydroxybenzene) classified under HTS 2907.29.10.00 as a specific polyphenol. It appears as white to yellowish crystalline powder, often with added stabilizers for preservation during transport. This chemically defined organic compound is used in analytical chemistry and as a photographic developing agent.
Pyrogallol 99%+ ACS Reagent Grade
ACS reagent grade pyrogallic acid (99%+ purity) is a high-purity polyphenol specifically enumerated in HTS 2907.29.10.00. Supplied as fine powder meeting American Chemical Society standards for laboratory use. Essential for redox titrations and as a standard in phenolic compound analysis.
Stabilized Pyrogallol for Photographic Use
Pyrogallol stabilized with sodium carbonate for photographic developing applications falls under HTS 2907.29.10.00 as a chemically defined polyphenol with permitted stabilizer (Chapter note f). Packaged in airtight containers to prevent oxidation during import.
Pyrogallic Acid Flakes Industrial Grade
Industrial grade pyrogallic acid in flake form (90-95% purity) is classified as pyrogallol under HTS 2907.29.10.00. These larger flakes reduce dusting during handling, with anti-dusting agents permitted by Chapter note (g). Used in synthetic rubber antioxidant production.
Pyrogallol with Emetic Additive Safety Grade
Safety-grade pyrogallol with added emetic for identification purposes (Chapter 29 note g) remains classified under HTS 2907.29.10.00. The emetic prevents accidental ingestion while maintaining chemical identity as trihydroxybenzene.