3,4-diaminobenzonitrile (17626-40-3) has some synonyms like BUTTPARK 43\57-88 ; 3,4-Diaminobenzonitrile ; 3,4-Diaminobenzonitrile 95+% ; 4-Cyanobenzene-1,2-diamine ,and so on. 3,4-diaminobenzonitrile (17626-40-3) white to light yellow crystal powder.

CAS: 17626-40-3
Molecular Formula: C₇H₇N₃
Molecular Weight: 133.15
Molecular structure:
H bond acceptors: 3 
H bond donors: 4 
Freely Rotating Bonds: 2 
Index of Refraction: 1.64 
Molar Refractivity: 38.55 cm³ 
Molar Volume: 106.9 cm³ 
Polarizability: 15.28 10^-24cm³ 
Surface Tension: 69.6 dyne/cm 
Density: 1.24 g/cm³ 
Flash Point: 176.8 °C 
Enthalpy of Vaporization: 61.54 kJ/mol 
Boiling Point: 368.7 °C at 760 mmHg 
Vapour Pressure: 1.25E-05 mmHg at 25°C 

 3,4-diaminobenzonitrile (17626-40-3)  is usually used like synthetic intermediate.

Hazard Codes:  Xn,Xi
Risk Statements:  22-36/37/38-20/21/22 (22:  Harmful if swallowed 36/37/38:  Irritating to eyes, respiratory system and skin 20/21/22:  Harmful by inhalation, in contact with skin and if swallowed)
Safety Statements:  26-36-36/37 (26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 36:  Wear suitable protective clothing 36/37:  Wear suitable protective clothing and gloves)
RIDADR:  3276
WGK Germany:  3
Hazard Note:  Irritant

Removal in wastewater treatment of 3,4-diaminobenzonitrile (17626-40-3) can be stated as follows:
Total removal:1.85  percent
Total biodegradation:0.09  percent
Total sludge adsorption:1.76  percent
Total to Air:0.00  percent
(using 10000 hr Bio P,A,S)