Empirical Formula: C₁₁H₁₅Br
Molecular Weight: 227.1408
Nominal Mass: 226 Da
Average Mass: 227.1408 Da
Monoisotopic Mass: 226.035705 Da 
Index of Refraction: 1.522
Molar Refractivity: 57.39 cm³
Molar Volume: 187.9 cm³
Surface Tension: 33.9 dyne/cm
Density: 1.208 g/cm³
Flash Point: 127.7 °C
Enthalpy of Vaporization: 47.94 kJ/mol
Boiling Point: 261.8 °C at 760 mmHg
Vapour Pressure: 0.0184 mmHg at 25 °C
Appearance: Clear pale yellow liquid
Structure of 4-Pentylbromobenzene (CAS NO.51554-95-1):
                      
IUPAC Name: 1-Bromo-4-pentylbenzene
Canonical SMILES: CCCCCC1=CC=C(C=C1)Br
InChI: InChI=1S/C11H15Br/c1-2-3-4-5-10-6-8-11(12)9-7-10/h6-9H,2-5H2,1H3
InChIKey: SGCJPYYTVBHQGE-UHFFFAOYSA-N
Product Category of 4-Pentylbromobenzene (CAS NO.51554-95-1): Building Blocks for Liquid Crystals;Functional Materials

 4-Pentylbromobenzene (CAS NO.51554-95-1) has been used for intermediate of liquid crystals.

Hazard Codes: Xi,Xn
Risk Statements: 20/21/22-36/37/38 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25-36-26 
S24/25:Avoid contact with skin and eyes. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.

 4-Pentylbromobenzene , its cas register number is 51554-95-1. It also can be called 1-Bromo-4-pentylbenzene ; and 1-Amyl-4-bromobenzene .