What are the physical and chemical properties of 3,7-dibromo-10H-phenothiazine (CAS: 21667-32-3)?

3,7-Dibromo-10H-phenothiazine (CAS: 21667-32-3) is a crystalline solid with a molecular weight of approximately 312.04 g/mol. It is poorly soluble in water but soluble in organic solvents such as ethanol. Chemically, it is stable under normal conditions but can undergo ring-opening reactions under basic conditions. It is commonly used in the synthesis of pharmaceuticals and sensors.