The 1-Pyrrolidinebutanenitrile, with the CAS registry number 35543-25-0 and EINECS registry number 252-612-4, has the systematic name of 4-(pyrrolidin-1-yl)butanenitrile. It is a kind of clear colorless to brown liquid, and the molecular formula of the chemical is C₈H₁₄N₂.

The characteristics of 1-Pyrrolidinebutanenitrile are as followings: (1)ACD/LogP: 0.62; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -2.46; (4)ACD/LogD (pH 7.4): -1.81; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 27.03 Å²; (13)Index of Refraction: 1.475; (14)Molar Refractivity: 40.51 cm³; (15)Molar Volume: 143.7 cm³; (16)Polarizability: 16.06×10^-24cm³; (17)Surface Tension: 37.8 dyne/cm; (18)Density: 0.961 g/cm³; (19)Flash Point: 101.3 °C; (20)Enthalpy of Vaporization: 46.53 kJ/mol; (21)Boiling Point: 228.7 °C at 760 mmHg; (22)Vapour Pressure: 0.0725 mmHg at 25°C. 

Preparation of 1-Pyrrolidinebutanenitrile: This chemical can be prepared by pyrrolidine and 4-chloro-butyronitrile. The reaction will need the menstruum acetone. The reaction time is 20 hours with temperature of 100°C, and the yield is about 78%. 

You should be cautious while dealing with this chemical. It irritates to eyes, respiratory system and skin, it is also harmful by inhalation, in contact with skin and if swallowed. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.    

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: N#CCCCN1CCCC1
(2)InChI: InChI=1/C8H14N2/c9-5-1-2-6-10-7-3-4-8-10/h1-4,6-8H2
(3)InChIKey: OSDDDHPYSNZBPF-UHFFFAOYAV

The toxicity data is as follows: