The 4'-Chlorobutyrophenone, with the CAS registry number 4981-63-9 and EINECS registry number 225-631-0, has the systematic name of 1-(4-chlorophenyl)butan-1-one. It is a kind of white to light beige cryst. powder or flakes. And the molecular formula of the chemical is C₁₀H₁₁ClO. What's more, while dealing with this chemical, you should avoid contacting with skin and eyes.

The characteristics of 4'-Chlorobutyrophenone are as followings: (1)ACD/LogP: 3.41; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.41; (4)ACD/LogD (pH 7.4): 3.41; (5)ACD/BCF (pH 5.5): 231.02; (6)ACD/BCF (pH 7.4): 231.02; (7)ACD/KOC (pH 5.5): 1712.02; (8)ACD/KOC (pH 7.4): 1712.02; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 17.07 Å²; (13)Index of Refraction: 1.519; (14)Molar Refractivity: 50.44 cm³; (15)Molar Volume: 165.9 cm³; (16)Polarizability: 19.99×10^-24cm³; (17)Surface Tension: 36.5 dyne/cm; (18)Density: 1.1 g/cm³; (19)Flash Point: 139.7 °C; (20)Enthalpy of Vaporization: 50.93 kJ/mol; (21)Boiling Point: 271.1 °C at 760 mmHg; (22)Vapour Pressure: 0.00657 mmHg at 25°C.

Preparation of 4'-Chlorobutyrophenone: This chemical can be prepared by butyryl chloride and chlorobenzene. The reaction will need reagent aluminium chloride. The reaction time is 4 hours with temperature of 40-60°C, and the yield is about 73%. 

Uses of 4'-Chlorobutyrophenone: It can react with benzonitrile to produce 4-(4-chloro-phenyl)-5-ethyl-2-phenyl-oxazole. It is cyclization reaction. This reaction will need reagent Hg(OTs)₂. The reaction time is 3 minutes with microwave irradiation, and the yield is about 71%.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=C(c1ccc(Cl)cc1)CCC
(2)InChI: InChI=1/C10H11ClO/c1-2-3-10(12)8-4-6-9(11)7-5-8/h4-7H,2-3H2,1H3
(3)InChIKey: XLCJPQYALLFIPW-UHFFFAOYAN