Potassium Alum Crystals from Germany
Potassium alum (potassium aluminum sulfate, KAl(SO4)2·12H2O) is a double salt used in water purification, leather tanning, and as a styptic agent. It falls under HTS 2833.30.00.00 as it is a classic alum, a hydrated double sulfate of a monovalent cation and trivalent aluminum.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Verify purity and chemical composition via lab analysis to confirm 'alum' status; ensure SDS includes CAS number 10043-67-1
• Watch for misclassification as single sulfates