IUPAC Name: 6-Methyl-2-oxo-1H-pyridine-3-carboxylic acid 
Following is the structure of 2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9):
                          
Empirical Formula: C₇H₇NO₃
Molecular Weight: 153.1354 g/mol
EINECS: 253-784-3
Index of Refraction: 1.555
Molar Refractivity: 36.55 cm³
Molar Volume: 113.7 cm³
Density: 1.345 g/cm³
Flash Point: 204.4 °C
Surface Tension: 51 dyne/cm
Melting point: 233-235 °C(lit.)
Enthalpy of Vaporization: 73.21 kJ/mol
Boiling Point: 414.4 °C at 760 mmHg
Vapour Pressure of 2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9): 5E-08 mmHg at 25 °C 
Product Categories of 2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9): Pyridines, Pyrimidines, Purines and Pteredines;Carboxylic Acids;Pyridines;Carboxylic Acids;C7 and C8;Heterocyclic Building Blocks 
Appearance of 2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9): light yellow to light orange crystalline powder
Canonical SMILES: CC1=CC=C(C(=O)N1)C(=O)O
InChI: InChI=1S/C7H7NO3/c1-4-2-3-5(7(10)11)6(9)8-4/h2-3H,1H3,(H,8,9)(H,10,11)
InChIKey: XRIHTJYXIHOBDQ-UHFFFAOYSA-N

 2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9) hasn't been listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65. And the toxicological properties have not been fully investigated.

Hazard Codes:  Xi
Risk Statements:  36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements:  36/37/39-26-22 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S22:Do not breathe dust.
WGK Germany:  3
Hazard Note:  Irritant

 2-Hydroxy-6-methylpyridine-3-carboxylic acid , its cas register number is 138116-61-9. It also can be called 2-Hydroxy-6-methylnicotinic acid ; 6-Methyl-2-oxo-1,2-dihydropyridine-3-carboxylic acid ; and 3-Carboxy-6-methyl-2-pyridone .
2-Hydroxy-6-methylpyridine-3-carboxylic acid (CAS NO.38116-61-9) could be stable under normal temperatures and pressures. It should avoid the condition like incompatible materials, strong oxidants. It is not compatible with strong oxidizing agents, strong reducing agents, strong bases, amines. And also prevent it to broken down into hazardous decomposition products: carbon monoxide,  irritating and toxic fumes and gases, carbon dioxide. However, its hazardous polymerization has not been reported.