Molecular Formula: NaOH; GR (AR) grade; CAS No.: 1310‐73‐2; Purity: min. 97.0%; Solubility in water: to past test; Chloride (Cl): max. 0.001%; Phosphate (PO4): max. 5ppm; Lead (Pb): max. 5ppm; Arsenic (As): max. 1ppm