The Molecular Structure of  2,5-Pyridinediamine (CAS NO.4318-76-7) is

Cas Register Number: 4318-76-7
IUPAC Name:  Pyridine-2,5-diamine
Synonyms:  2,5-Pyridinediamine ; Pyridin-2,5-diamin ; Pyridine-2,5-diamine ; 2,5-Diamino Pyridine ; 2,5-Pyridinediamine (9CI) ; Pyridine, 2,5-diamino-
Molecular formula: C₅H₇N₃
Molecular weight: 109.129180g/mol
Product Categories: compounds of pyridine;Pyridine;Pyridines derivates;Pyridines;C5;Heterocyclic Building Blocks
H bond acceptors: 3
H bond donors: 4
Freely Rotating Bonds: 1
Polar Surface Area: 19.37 Å²
Index of Refraction: 1.676
Molar Refractivity: 32.81 cm³
Molar Volume: 87.2 cm³
Surface Tension: 70.9 dyne/cm
Density: 1.251 g/cm³
Flash Point: 179.1 °C
Enthalpy of Vaporization: 57.15 kJ/mol
Boiling Point: 329.1 °C at 760 mmHg
Vapour Pressure of  2,5-Pyridinediamine (CAS NO.4318-76-7): 0.000182 mmHg at 25°C

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
RIDADR: UN2671
WGK Germany: 3
RTECS: US7555000
HazardClass: 6.1
PackingGroup: II