Phenyltrimethylammonium tribromide Chemical Properties Melting point 110-115 °C (dec.)(lit.) density 2.2071 (rough estimate) refractive index 1.6500 (estimate) storage temp. Refrigerator solubility ethanol: 10 mg/mL hot, clear form Crystalline Powder color Orange Water Solubility Insoluble Sensitive Hygroscopic