caustic soda: 1. CAS NO.:1310-73-2 2. HS Code:28151100 3. Purity: 96%, ... ,473-1,475 Fp :176-178°C storage temp. :2-8°C solubility :H2O: 1 M at 20 °C, clear, colorless ... :176-178 ºC Sensitive :Air Sensitive & Hygroscopic Merck :14,8627 CAS DataBase Reference: NIST Chemistry Reference: EPA Substance Registry System: Contact ...