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Methyl tert-butyl ether (MTBE) is a flammable liquid with a distinctive, disagreeable odor. Mainly MTBE is used in the fuel industry as an additive to increase the octane number.
Methyl tert-Butyl Ether (MTBE) is a synthetic organic compound with the chemical formula C5H12O. It is a colorless, volatile liquid with a characteristic ether-like odor. MTBE is widely used as a fuel additive in gasoline to enhance octane ratings and reduce air pollution. Additionally, it has various industrial applications due to its solvency properties.
Grade | AR |
Purity | 99.5% |
CAS No. | 1634-04-4 |
Molecular Formula | C5H12O |
Molecular Weight | 88.15 |
H.S. Code | 2909.1990 |
Shelf Life | 60 Months |
Grade | AR |
Purity | 99.5% |
CAS No. | 1634-04-4 |
Molecular Formula | C5H12O |
Molecular Weight | 88.15 |
H.S. Code | 2909.1990 |
Shelf Life | 60 Months |
Physical state at 20 °C |
Liquid |
|
Colour |
Clear Colorless |
|
Odour |
Characteristic ethereal odor |
|
Melting point/ Freezing point [°C] |
-110°C |
|
Auto-ignition temperature [°C] |
374 °C |
|
Flammability (solid, gas) |
Flammable |
|
Relative density, gas (air=1) |
0.74 g/cm3 at 25 °C |
|
Solubility in water [% weight] |
Insoluble in water |
|
Partition coeficient Log Pow octanol / water at 20°C |
1.77 |
|
Explosion limits – upper [%] |
15.10% |
|
Explosion limits -lower [%] |
1.60% |
|
Specifications |
|
|
Appearance |
Clear colorless liquid |
|
Purity (by GC) |
Min 99.5% |
|
Density (d20°C/4°C) |
0.739 – 0.740 |
|
APHA colour |
Max 10 |
|
Non-volatile matter |
Max 0.001% |
|
Methanol (GC,area %) |
Max 0.01% |
|
2-Methyl-2-propanol (GC) |
Max 0.05% |
|
Acidity |
Max 0.0005 meq/g |
|
Alkalinity |
Max 0.0002 meq/g |
|
Hazardous Statement H225-H315 |
|
|
Precaution Statement P210-P233-P303+ P361+P353 |
|
Physical state at 20 °C | Liquid |
Colour | Clear Colorless |
Odour | Characteristic ethereal odor |
Melting point/ Freezing point [°C] | -110°C |
Auto-ignition temperature [°C] | 374 °C |
Flammability (solid, gas) | Flammable |
Relative density, gas (air=1) | 0.74 g/cm3 at 25 °C |
Solubility in water [% weight] | Insoluble in water |
Partition coeficient Log Pow octanol / water at 20°C | 1.77 |
Explosion limits – upper [%] | 15.10% |
Explosion limits -lower [%] | 1.60% |
Specifications | |
Appearance | Clear colorless liquid |
Purity (by GC) | Min 99.5% |
Density (d20°C/4°C) | 0.739 – 0.740 |
APHA colour | Max 10 |
Non-volatile matter | Max 0.001% |
Methanol (GC,area %) | Max 0.01% |
2-Methyl-2-propanol (GC) | Max 0.05% |
Acidity | Max 0.0005 meq/g |
Alkalinity | Max 0.0002 meq/g |
Hazardous Statement H225-H315 | |
Precaution Statement P210-P233-P303+ P361+P353 | |
MTBE is primarily used as an oxygenate additive in gasoline to increase its octane rating and improve combustion efficiency. It enhances engine performance by facilitating more complete fuel combustion, thereby reducing emissions of harmful pollutants such as carbon monoxide and nitrogen oxides.
MTBE is employed as a methylating agent in organic synthesis reactions to introduce methyl groups into organic molecules. It is particularly useful in reactions involving sensitive substrates or those requiring mild reaction conditions.
MTBE is utilized in extraction processes to separate and purify organic compounds from complex mixtures. It is commonly used in liquid-liquid extraction techniques to isolate desired compounds from reaction mixtures or natural products.
MTBE is highly flammable and can form explosive mixtures with air. It has a low flash point and can ignite easily when exposed to heat, sparks, or open flames. Therefore, appropriate precautions should be taken to prevent fire hazards, including the use of spark-proof equipment and proper storage away from ignition sources.
Contact with MTBE liquid or vapor may cause irritation or chemical burns to the skin. Prolonged or repeated skin contact should be avoided, and appropriate personal protective equipment (PPE), such as gloves and protective clothing, should be worn to prevent skin exposure.
MTBE can cause irritation or damage to the eyes upon contact. In case of eye exposure, immediate flushing with water for at least 15 minutes is recommended. Contact lenses should be removed if present and medical attention sought if irritation persists.
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