Ethylbenzene

IUPAC Name: Ethylbenzene

MCL: 0.7 ppm

Source: Used as an intermediate in the production of styrene. Occurs naturally in crude oil, and as an additive in gasoline fuel.

Summary: Ethylbenzene is a common intermediate in the synthesis of organic compounds, most notable being styrene. It may also be used in paints and insecticides, and has uses as a solvent. It is found naturally in crude petroleum and coal tar and may be used in fuel for aviation and automobiles. It is a colorless liquid at room temperature that is soluble in water up to 170 mg/L at 25 C. It is less dense than water at 0.8626 g/mL at 25 C. Upon decomposition it produces gaseous carbon oxides. Ethylbenzene is classified by the EPA as a Hazardous Air Pollutant (HAPs). It will exist in the atmosphere as a vapor and undergo degradation by hydroxyl radicals with a half-life of 2.3 days. Atmospheric degradation from nitrate radicals has a reaction half-life of 56 days. The compound has been measured in rainwater and snow. Koc values ranging from 224 – 257 indicate moderate mobility within soil. Volatilization from soil and water is expected to be a major method of natural removal. Biodegradation in water will occur under aerobic conditions.

GHS Hazard Statement: H225, H303, H304, H315, H316, H319, H320, H332, H335, H336, H350, H351, H360, H361d, H371, H373, H400, H411, H412, GHS02, GHS07, GHS08, GHS09