Specifications(Caustic Soda Pearls 99%min): 1. Item: STANDARD 2. NaOH: 99% 3. Na2CO3:0.5%max 4. NaCL:0.03%max 5. Fe2O3: 0.005%max Packing in 25KG net PP bag lined with double PE inner bags. Specifications(Caustic Soda Flakes 99%min) 1. Item: Standard 2. NaOH: 99%min 3. Na2CO3: 0.5%max 4. NaCL:0.05%max 5. Fe2O3:0.005%max Packing in 25KG net PP bag lined with double PE inner bags. Specifications(Caustic Soda Solid 99%min) 1. Item: Standard 2. NaOH: 99%min 3. Na2CO3: 0.9%max 4. NaCL:0.15%max 5. Fe2O3: 0.01%max Packing in 200KG net sheet metal drugs.