Product details are below: Purity (NaOH): 99.0 % Min Sodium Carbonate (Na2CO3): 0.8 % Max Sodium Chloride (NaCl): 0.1 % Max Iron (Fe): 50 ppm Max We can provide many kinds of packagings as per your request, also give you the professional and excellent service. If you are interested in them, pls mail to us,we will send you our best offer .