Pyrrole, with its CAS registry no. 109-97-7, has its chemical formula of C₄H₅N and pyrrole molecular weight of 67.09.
For being one kind of colourless to brown liquid with chloroform odour, it is stable under normal pressure and is incompatible with strong acids, strong oxidizing agents. With the pyrrole density 0.99 g/cm3, this chemical has its synonym of Azole. The structure of pyrrole is as below:                                                                                                                                        

Propertites of pyrrole are as below: (1)ACD/LogP: 0.845; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.85; (4)ACD/LogD (pH 7.4): 0.85; (5)ACD/BCF (pH 5.5): 2.58; (6)ACD/BCF (pH 7.4): 2.58; (7)ACD/KOC (pH 5.5): 68.67; (8) ACD/KOC (pH 7.4): 68.67; (9)#H bond acceptors: 1; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 15.79; (13)Index of Refraction: 1.523; (14)Molar Refractivity: 20.686 cm³; (15)Molar Volume: 67.756 cm³; (16)Polarizability: 8.201×10^-24cm³; (17)Surface Tension: 36.798999786377 dyne/cm; (18)Density: 0.99 g/cm³; (19)Flash Point: 33.333 °C; (20)Enthalpy of Vaporization: 38.75 kJ/mol; (21)Boiling Point: 129.76 °C at 760 mmHg; (22)Vapour Pressure: 12.2340002059937 mmHg at 25°C.

Pyrroles chemistry has wide applications in different fields, has it has special properties in some way. Many company has been in the reseach of pyrroles chemistry, such as leading supplier of Pyrrole Nanjing Aily Biotechnology Co.,Ltd., which is specialized in chemical manufacture and custom synthesis. Following is the immobilization of probes using pyrrole.

Molecules complexed with pyrrole:

Electrocopolymerisation of pyrrole directly on the gold surface