MTBE

IUPAC Name: 2-methoxy-2-methylpropane

MCL: 0.02 – 0.04 ppm

Source: Used as an additive in gasoline, runoff into the environment is possible, as well as leaking storage tanks.

Water Treatment: https://tdb.epa.gov/tdb/contaminant?id=10340

Summary: Methyl tert-butyl ether (MTBE) has applications as an additive in unleaded gasoline. It is a liquid at room temperature with a solubility in water of 51,000 mg/L at 25 C. It is less dense than water at 0.7353 g/mL at 25 C. It has a pKa value of -3.70. The compound oxidizes rapidly in air and is highly flammable. MTBE has a low Koc value ranging from 11-12 so it is expected to be very mobile within soil. Volatilization is expected to be the dominant natural removal process in both soil and natural waters. It is expected to be persistent in the environment.

GHS Hazard Statement: H225, H303, H304, H315, H320, H335, H336, H351, GHS02, GHS07, GHS08