Molecular structure of 6-Aminonicotinic acid (CAS NO.3167-49-5) is:

Product Name: 6-Aminonicotinic acid
CAS Registry Number: 3167-49-5
IUPAC Name: 6-aminopyridine-3-carboxylic acid
Molecular Weight: 138.12404 [g/mol]
Molecular Formula: C₆H₆N₂O₂
XLogP3: 1.4
H-Bond Donor: 2
H-Bond Acceptor: 4 
EINECS: 221-630-4
Melting Point: >300 °C(lit.)
Surface Tension: 77.7 dyne/cm 
Water Solubility: ca 1.0 g/L (20 °C)
Density: 1.417 g/cm³
Flash Point: 179.8 °C
Enthalpy of Vaporization: 65.5 kJ/mol
Boiling Point: 373.6 °C at 760 mmHg
Vapour Pressure: 3.03E-06 mmHg at 25°C
Product Categories: Aminoacid;Amines;blocks;Carboxes;Pyridines;Pyridine;pyridine derivative;Pyridines, Pyrimidines, Purines and Pteredines;pharmacetical;Pyridine series;Carboxylic Acids;Organic acids;Chemical Amines;Heterocycles;Carboxylic Acids

 6-Aminonicotinic acid (CAS NO.3167-49-5)is used as an intermediate for feed additives,agrochemcials,pharmaceuticals and animal food enrichments. It is used for the prophylaxis. Their derivatives are used for these effects.It acts to reduce plasma cholesterol,as a vasodilator and to treat pellagra. 

Hazard Codes: Xi, T
Risk Statements: 36/37/38-23/24/25 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed.
Safety Statements: 22-24/25-45-36/37/39-26 
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
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.
WGK Germany: 3
Hazard Note: Irritant
TSCA: T
HazardClass: IRRITANT

 6-Aminonicotinic acid , its cas register number is 3167-49-5. It also can be called 2-Amino-5-carboxypyridine ; 2-Amino-5-pyridinecarboxylic acid ; 6-Aminopyridine-3-carboxylic acid .It is a light yellow cryst.