... NO.:1310-73-2 2. HS Code:28151100 3. Purity: 96%, 99%, etc 4. Appearance: Flakes, Pearl (white or light blue) Caustic ... -185-5Place of Origin: China (Mainland)Grade Standard: Industrial GradePurity: 99% minAppearance: solid; liquid; white or light blueApplication: metallurgy, petroleum, ... NO.:1310-73-2 2. HS Code:28151100 3. Purity: 96%, 99%, etc 4. Appearance: Flakes, Pearl (white or light blue) ...