Sodium Metabisulfite Pickling Acidulant
Sodium metabisulfite generates sulfurous acid in situ for leather pickling operations, qualifying as wholly inorganic under HTS 3202.90.10.00. Essential for preparing hides before chrome tanning while acting as antioxidant. Prevents bacterial growth during wet processing.
Import Duty Rates by Country of Origin
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide generation rate documentation showing SO2 yield for tanning verification
• Comply with fumigant gas regulations due to sulfur dioxide evolution potential
• Distinguish from wine preservative grade with leather-specific purity certificate
Related Products under HTS 3202.90.10.00
Chromium Sulfate Tanning Agent
Chromium sulfate is an inorganic compound used as a primary tanning agent in the leather industry to convert raw hides into durable leather by cross-linking collagen fibers. It falls under HTS 3202.90.10.00 because it consists wholly of inorganic substances and is specifically employed for tanning processes. This synthetic salt provides chrome-tanned leather with excellent water resistance and softness.
Aluminum Sulfate Leather Tanning Salt
Aluminum sulfate serves as an inorganic tanning agent, particularly in combination with chrome salts, to produce combination-tanned leathers with enhanced stability. Classified under HTS 3202.90.10.00 as it consists entirely of inorganic substances used specifically for pre-tanning or tanning hides. It helps achieve firmer leather grain and improved heat resistance.
Zirconium Oxide Tanning Compound
Zirconium oxide-based inorganic tanning agents produce high-performance leathers with superior abrasion resistance for shoe uppers and upholstery. This product qualifies for HTS 3202.90.10.00 due to its wholly inorganic composition and dedicated tanning function. It creates leathers with excellent hydrothermal stability.
Sodium Bisulfate Tanning Pickling Agent
Sodium bisulfate is used in the pickling stage of leather tanning to lower pH and prepare hides for chrome tanning, consisting entirely of inorganic substances. It fits HTS 3202.90.10.00 as an essential inorganic preparation in the pre-tanning sequence. This acid salt prevents hide putrefaction during processing.
Titanium Dioxide Tanning Retanning Agent
Synthetic titanium dioxide serves as an inorganic retanning agent to whiten and opacify leather during finishing stages, meeting the wholly inorganic requirement of HTS 3202.90.10.00. It enhances leather brightness and fullness without organic additives. Used particularly in white leather production for fashion goods.
Ammonium Aluminum Sulfate Tanning Salt
Ammonium aluminum sulfate (alum) acts as an inorganic tanning agent for producing vegetable-retanned or combination leathers with firm texture. Classified under HTS 3202.90.10.00 for its purely inorganic composition and tanning application. Traditional use in glove and bookbinding leathers.