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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a general chemical without tanning labeling
Pure chromium sulfate without specific tanning preparation falls under inorganic chemicals of Chapter 28.
If when mixed with organic finishing agents
Addition of organic substances exceeds 'wholly inorganic' criteria, moving to finishing preparations.
If containing natural tanning extracts
Blends with organic or natural tanning materials are classified separately from purely inorganic products.
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Import Tips & Compliance
• Verify purity and composition certificates to confirm 100% inorganic content, avoiding reclassification to organic headings
• Include end-use documentation proving tanning application to prevent misclassification as general chemicals under Chapter 28
• Comply with REACH and EPA regulations for heavy metal content in chrome compounds during import
Related Products under HTS 3202.90.10.00
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.
Zinc Oxide Leather Tanning Stabilizer
Precipitated zinc oxide functions as an inorganic tanning auxiliary to stabilize chrome-tanned leathers against thermal degradation. Meets HTS 3202.90.10.00 wholly inorganic criterion for leather processing preparations. Provides leathers with enhanced aging properties.