CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | P-methylstyrene appears as a clear colorless liquid with an aromatic odor. Usually shipped with an inhibitor such as tert-butyl catechol added May polymerize if contaminated or subjected to heat. If polymerization takes place inside a closed container, the container may rupture violently. Vapors irritate the mucous membranes. Less dense than water and insoluble in water. Hence floats on water. Used in making plastics, especially as a monomer for polyesters. |
|---|---|
| Color/Form | Liquid |
| Boiling Point | 172 °C |
| Melting Point | -37.8 °C |
| Flash Point | 125 to 127 °F (NFPA, 2010) |
| Solubility | In water, 89 mg/L at 25 °C |
| Density | 0.9173 g/cu cm at 25 °C |
| Vapor Density | Relative vapor density (air = 1): 4.1 |
| Vapor Pressure | 1.81 [mmHg] |
| LogP | log Kow = 3.35 |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Autoignition Temperature | 515 °C. |
| Viscosity | 0.0020986 Pa.s (liquid) at 239.02 K |
| Heat of Combustion | -4.8229X10+09 J/kmol |
| Heat of Vaporization | 6.20X10+07 J/kmol at 25 °C |
| Surface Tension | 0.043227 Newtons/m at 239.02 K |
| Refractive Index | Index of refraction: 1.5420 at 20 °C/D |
| Kovats Retention Index | 980.5 965.9 1000 985 977.5 977.6 977.9 966 980 994 982 978 985 |
| Other Experimental Properties | Liquid molar volume = 0.129067 cu m/kmol; heat of formation = 1.1464X10+08 J/kmol |
| Chemical Classes | Other Classes -> Aromatic Hydrocarbons |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H226:Flammable liquids H304:Aspiration hazard H411:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273:Avoid release to the environment. |
COMPUTED DESCRIPTORS
| Molecular Weight | 118.18 g/mol |
|---|---|
| XLogP3 | 3.6 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 1 |
| Exact Mass | 118.078250319 g/mol |
| Monoisotopic Mass | 118.078250319 g/mol |
| Topological Polar Surface Area | 0 Ų |
| Heavy Atom Count | 9 |
| Formal Charge | 0 |
| Complexity | 86.2 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
P-methylstyrene appears as a clear colorless liquid with an aromatic odor. Usually shipped with an inhibitor such as tert-butyl catechol added May polymerize if contaminated or subjected to heat. If polymerization takes place inside a closed container, the container may rupture violently. Vapors irritate the mucous membranes. Less dense than water and insoluble in water. Hence floats on water. Used in making plastics, especially as a monomer for polyesters.