| Physical Description |
Isopropenylbenzene appears as a colorless liquid. Insoluble in water and less dense than water. Flash point 115 °F. May be mildly toxic by ingestion, inhalation and skin absorption. Vapors may be narcotic by inhalation. Used as a solvent and to make other chemicals. |
| Color/Form |
Colorless liquid ... |
| Odor |
... Characteristic odor. |
| Boiling Point |
329.7 °F at 760 mmHg (NTP, 1992) |
| Melting Point |
-9 °F (NTP, 1992) |
| Flash Point |
129 °F (NTP, 1992) |
| Solubility |
less than 1 mg/mL at 72 °F (NTP, 1992) |
| Density |
0.91 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density |
4.08 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure |
1.9 mmHg at 68 °F ; 5 mmHg at 93 °F (NTP, 1992) |
| LogP |
log Kow= 3.48 |
| Autoignition Temperature |
1066 °F (USCG, 1999) |
| Decomposition |
When heated to decomposition, it emits acrid smoke & fumes. |
| Viscosity |
0.940 cP @ 20 °C |
| Heat of Combustion |
4863.73 kJ/mol at 25 °C (gas at constant pressure) |
| Heat of Vaporization |
404.55 J/g at 25 °C; 326.35 J/g at boiling point |
| Surface Tension |
32.40 dynes/cm @ 20 °C |
| Ionization Potential |
8.35 eV |
| Polymerization |
... Subject to polymerization by heat or catalysts ... |
| Odor Threshold |
Odor Threshold Low: 0.05 [mmHg] Odor Threshold High: 0.16 [mmHg] Odor threshold (detection at 0.052 ppm and recognition at 0.16 ppm) from CHEMINFO |
| Refractive Index |
Index of refraction: 1.5386 @ 20 °C/D |
| Kovats Retention Index |
980 964.9 966 985 948 973 966.4 968 980 972.5 977.4 983.1 963.1 963.1 963.1 963.1 963.2 963.5 969 966 977 965 972 965.23 964 973.4 961 967 968 963 968 |
| Other Experimental Properties |
Ionization potential: 8.35 electron volts (eV) |
| Chemical Classes |
Plastics & Rubber -> Styrenes |
