The 1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one, with the CAS registry number 13024-90-3 and EINECS registry number 235-884-9, has the systematic name of 2-(4-chlorophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one. It belongs to the product category of Intermediates of Dyes and Pigments. And the molecular formula of the chemical is C₁₀H₉ClN₂O.

The characteristics of this chemical are as followings: (1)ACD/LogP: 1.03; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.03; (4)ACD/LogD (pH 7.4): 1.03; (5)ACD/BCF (pH 5.5): 3.58; (6)ACD/BCF (pH 7.4): 3.58; (7)ACD/KOC (pH 5.5): 86.66; (8)ACD/KOC (pH 7.4): 86.67; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 32.67 Å²; (13)Index of Refraction: 1.625; (14)Molar Refractivity: 55.8 cm³; (15)Molar Volume: 157.7 cm³; (16)Polarizability: 22.12×10^-24cm³; (17)Surface Tension: 46.4 dyne/cm; (18)Density: 1.32 g/cm³; (19)Flash Point: 185.3 °C; (20)Enthalpy of Vaporization: 63.12 kJ/mol; (21)Boiling Point: 382.8 °C at 760 mmHg; (22)Vapour Pressure: 4.62E-06 mmHg at 25°C. 

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: Clc2ccc(N1/N=C(\CC1=O)C)cc2
(2)InChI: InChI=1/C10H9ClN2O/c1-7-6-10(14)13(12-7)9-4-2-8(11)3-5-9/h2-5H,6H2,1H3
(3)InChIKey: WHIXQFSPEDIMGL-UHFFFAOYAH