The 3-Hydroxy-6-methyl-2-nitropyridine , its cas register number is 15128-90-2. The IPUAC name about this chemicals is 6-Methyl-2-nitropyridin-3-ol .Following are the physical and chemical properties about it: (1)Index of Refraction: 1.604 (2)Molar Refractivity: 37.59 cm³ (3)Molar Volume: 109.2 cm³ (4)Surface Tension: 64.5 dyne/cm (5)Enthalpy of Vaporization: 64.16 kJ/mol (6)Vapour Pressure: 5.2E-06 mmHg at 25 °C . It belongs to the following product categories, such as Pyridines, Pyrimidines, Purines and Pteredines and Pyridine. 

The 3-Hydroxy-6-methyl-2-nitropyridine is a yellow fine crystalline powder, If you want to use it, you shoulde be more careful, because it is irritating to eyes, respiratory system and skin.  In the use process, you need to wear suitable protective clothing, gloves and eye/face protection and in case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Also WGK Germany about this chemicals is 3.

Following are some first aid measures: (1) If it irriating to eyes, flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids and get medical aid. (2) If it respiratory skin, get medical aid and flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. (3) If inhalation it, remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Also get medical aid.

This chemicals can be described computed from structure:
1) Canonical SMILES: CC1=NC(=C(C=C1)O)[N+](=O)[O-]
2) InChI: InChI=1S/C6H6N2O3/c1-4-2-3-5(9)6(7-4)8(10)11/h2-3,9H,1H3
3) InChIKey: WZMGQHIBXUAYGS-UHFFFAOYSA-N