The Isobutene, with the CAS registry number 115-11-7 and EINECS registry number 204-066-3, has the systematic name and IUPAC name of 2-methylprop-1-ene. It is a kind of colorless gas at standard temperature and pressure, and belongs to the following product categories: Gas Cylinders; Hydrocarbons (Low Boiling point); Synthetic Organic Chemistry. And the molecular formula of this chemical is C₄H₈.You should be cautious while dealing with Isobutylene. It is a kind of extremely flammable chemicalirritates eyes, respiratory system and skin. Therefore, you had better take the following instructions: Keep container in a well-ventilated place; Keep away from sources of ignition - No smoking; Take precautionary measures against static discharges.
 
The physical properties of Isobutene are as followings:
(1)ACD/LogP: 2.25; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 2.246; (4)ACD/LogD (pH 7.4): 2.246; (5)ACD/BCF (pH 5.5): 29.979; (6)ACD/BCF (pH 7.4): 29.979; (7)ACD/KOC (pH 5.5): 396.941; (8)ACD/KOC (pH 7.4): 396.941; (9)#H bond acceptors: 0; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 0 Å²; (13)Index of Refraction: 1.368; (14)Molar Refractivity: 20.148 cm³; (15)Molar Volume: 89.457 cm³; (16)Polarizability: 7.987×10^-24cm³; (17)Surface Tension: 15.147 dyne/cm; (18)Density: 0.627 g/cm³; (19)Enthalpy of Vaporization: 23.496 kJ/mol; (20)Boiling Point: °C at 760 mmHg; (21)Vapour Pressure: 2143.214 mmHg at 25°C.

Preparation of Isobutene:
 It can be isolated from refinery streams by reaction with sulfuric acid. But in industial, it is commonly produced by catalytic dehydrogenation of isobutane.

Uses of Isobutene:
It is usually used as an intermediate in the production of a variety of products, such as gasoline oxygenates methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE), fuel additive isooctane, methacrolein, butyl rubber, and antioxidants butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA). 
 
You can still convert the following datas into molecular structure:
(1)SMILES: CC(=C)C
(2)InChI: InChI=1/C4H8/c1-4(2)3/h1H2,2-3H3
(3)InChIKey: VQTUBCCKSQIDNK-UHFFFAOYAW

The toxicity data of Isobutylene is as follows: