?2-Amino-5-bromo-3-nitropyridine , its cas register number is 6945-68-2. It also can be called 2-Pyridinamine,5-bromo-3-nitro- ;?5-Bromo-3-nitropyridin-2-amine ;?5-Bromo-3-Nitropyridin-2-Amine ; 5-Bromo-3-Nitro-Pyridin-2-Ylamine . It is a?yellow-brown crystalline powder.