Methyl tert-butyl ether

CAS Number
1634-04-4
EC Number
216-653-1
Chemical Formula
C5H12O
Molecular Weight
88.15 g/mol
Abbreviation
MTBE

Description

Methyl tert-butyl ether (CAS 1634-04-4), commonly known as MTBE, is an ether-based solvent used across chemical processing and specialty formulation industries. It offers fast evaporation and strong solvency for a range of organic compounds. This material is a practical choice where clean solvent recovery is a priority. In personal care and cosmetics manufacturing, it functions as a process solvent for extracting and purifying fragrance ingredients and active compounds.

Its low residue profile suits applications where solvent carryover into finished formulations must be minimized. In laboratory and analytical settings, it is a standard extraction solvent for isolating non-polar compounds from aqueous matrices. Flavor and fragrance producers also use it as a carrier solvent during intermediate synthesis steps. In these environments, controlled evaporation aids in precise concentration management during the production cycle.

The product is supplied as a liquid in bulk quantities, intermediate bulk containers (IBCs), and drums. Technical grade is the most common commercial specification for industrial use and large-scale processing. High-purity grades are available for analytical and specialty synthesis applications. Buyers should confirm purity thresholds and peroxide content specifications when sourcing for sensitive extraction or formulation processes.

Other Names (Synonyms)

tert-C4H9OCH3|t-Butyl methyl ether|Methyl tertiary-butyl ether|Methyl 1,1-dimethylethyl ether|2-Methyl-2-methoxypropane|2-Methoxy-2-methylpropane|MTBE|Methyl t-butyl ether

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point -108.6 °C
Boiling Point 55.2 °C
Density 0.7405 g/cm³ @ Temp: 20 °C
Flash Point -27 °F
Appearance Methyl-tert-butyl ether is a colorless liquid.
Color APHA: ≤10
Odor Characteristic ethereal odor
Form Powder or Needles
Water Solubility 51 g/L (20 ºC)
Vapor Pressure 4.05 psi ( 20 °C)
Refractive Index n 20/D 1.369(lit.)
Log P 1.06 at 20℃

Documentation

Safety & Handling Learn More

Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H225 Highly Flammable liquid and vapor
H303 May be harmful if swallowed
H304 May be fatal if swallowed and enters airways
H315 Causes skin irritation

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.

Trade & Regulatory

HS Code 29091900
UN Number 2398
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 3
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