Ammonium iron (III) sulfate dodecahydrate AGR ACS, USP, NF

FeNH₄(SO₄)₂·12H₂O
Iron (III) ammonium sulfate, iron alum
M.W: 482.19  CAS: 7783-83-7  EC: 233-382-4  
H: H319;H315  P: P264;P280;P302+P352;P305+P351+P338;P332+P313;P337+P313  

• Assay 98.50 – 102.00%
• Appearance Pale violet crystals
• Substances insoluble in water (H2O) ≤ 0.01%
• Chloride (Cl^–) ≤ 0.001%
• Ferrous ion Passes test
• Copper (Cu) ≤ 0.003%
• Nitrates (NO₃) ≤ 0.01%
• Calcium (Ca) ≤ 0.01%
• Magnesium (Mg) ≤ 0.005%
• Potassium (K) ≤ 0.005%
• Sodium (Na) ≤ 0.02%
• Zinc (Zn) ≤ 0.003%
• Substances not precipited by ammonia (NH₄) ≤ 0.05%