306975

tert-Butyl methyl ether

anhydrous, 99.8%

• Synonym(s): MTBE, Methyl tert-butyl ether
• Linear Formula: (CH₃)₃COCH₃
• CAS Number: 1634-04-4
• Molecular Weight: 88.15
• Beilstein/REAXYS Number: 1730942
• EC Number: 216-653-1
• MDL number: MFCD00008812
• UNSPSC Code: 12352112
• PubChem Substance ID: 57648465
• NACRES: NA.21

Properties

• grade: anhydrous
• Quality Level: 100
• vapor density: 3.1 (vs air)
• vapor pressure: 4.05 psi
• assay: 99.8%
• form: liquid
• autoignition temp.: 705 °F
• expl. lim.: 15.1 %
• impurities: <0.003% water; <0.005% water (100 mL pkg)
• evapn. residue: <0.0005%
• refractive index: n20/D 1.369 (lit.)
• bp: 55-56 °C (lit.)
• mp: -110 °C
• density: 0.74 g/mL at 25 °C (lit.)
• SMILES string: COC(C)(C)C
• InChI: 1S/C5H12O/c1-5(2,3)6-4/h1-4H3
• InChI key: BZLVMXJERCGZMT-UHFFFAOYSA-N

Description

General description

tert-Butyl methyl ether (MTBE) is a gasoline additive. MTBE undergoes oxidative degradation in the presence of propane-oxidizing bacterial strains. The kinetic studies of heat-assisted persulfate oxidation of MTBE under various parameters suggests that the reaction follows the pseudo-first-order kinetics. MTBE can be synthesized by acid catalyzed reaction between methanol and isobutene. A study suggests that the addition of MTBE increases the number of active sites during polymerization of propene by stopped-flow method.

tert-Butyl methyl ether is a commonly used organic solvent that can be synthesized by acid catalyzed reaction between methanol and isobutene. It is an effective alternative to lead containing additives for enhancing the octane rating of gasoline.

Application

tert-Butyl methyl ether may be used to synthesize fatty acid methyl esters (FAMEs) and glycerol tert-butyl ether via transesterification with canola oil under supercritical conditions.

Safety Information

• pictograms: GHS02,GHS07
• signalword: Danger
• hcodes: H225,H315
• pcodes: P210 - P233 - P240 - P241 - P242 - P303 + P361 + P353
• Hazard Classifications: Flam. Liq. 2 - Skin Irrit. 2
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 1
• flash_point_f: -18.4 °F - closed cup
• flash_point_c: -28 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves