The 4-Ethylphenylhydrazine hydrochloride with the cas number 53661-18-0 is also called Hydrazine,(4-ethylphenyl)-, hydrochloride (1:1). The systematic name is (4-ethylphenyl)diazanium chloride. Its molecular formula is C₈H₁₂N₂^.HCl. It should be stored in dry and cool environment.

The properties of the chemical are: (1)ACD/LogP: 2.24; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.95; (4)ACD/LogD (pH 7.4): 2.24; (5)ACD/BCF (pH 5.5): 15.27; (6)ACD/BCF (pH 7.4): 29.4; (7)ACD/KOC (pH 5.5): 202.67; (8)ACD/KOC (pH 7.4): 390.1; (9)#H bond acceptors: 2; (10)#H bond donors: 3; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 3.24 Å²; (13)Enthalpy of Vaporization: 49.51 kJ/mol ; (14)Vapour Pressure: 0.0144 mmHg at 25°C.

While using this chemical, you should be very cautious. This chemical is not only irritating to skin, but also irritating to eyes and respiratory system. Therefore, you should take the following instructions. Firstly, you should wear suitable gloves and eye/face protection. Then in case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: [Cl-].N(c1ccc(cc1)CC)[NH3+]
(2)InChI: InChI=1/C8H12N2.ClH/c1-2-7-3-5-8(10-9)6-4-7;/h3-6,10H,2,9H2,1H3;1H
(3)InChIKey: YGFUKCJADFMHGW-UHFFFAOYAK