... 73-2 2. HS Code:28151100 3. Purity: 96%, 99%, etc 4. Appearance: Flakes, Pearl (white or light ... specification /gradesodium hyroxide by ion membrance processdiaphragrn processsuper1stsuper1ststandardNaOH %≥99.599.096.096.095.0Na2CO3 %≤0.450.51.31 ... -5Place of Origin: China (Mainland)Grade Standard: Industrial GradePurity: 99% minAppearance: solid; liquid; white or light blueApplication: metallurgy, ...