Product Description of tert-Butyl methyl ether CAS#1634-04-4
Methyl tert-butyl ether is a colorless transparent volatile liquid with special odor. It is an important gasoline additive with high octane value.
Methyl tert-butyl ether is primarily used as gasoline octane booster to improve fuel combustion performance, widely adopted in petroleum refining industry.
It is also widely applied as organic solvent and raw material for fine chemical synthesis.
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Chemical Properties of tert-Butyl methyl ether CAS#1634-04-4
| Melting point | -110 °C |
| Boiling point | 55-56 °C(lit.) |
| density | 0.7404 |
| vapor density | 3.1 (vs air) |
| vapor pressure | 4.05 psi ( 20 °C) |
| refractive index | n20/D 1.369(lit.) |
| Fp | -27 °F |
| storage temp. | Store at +2°C to +25°C. |
| solubility | 42g/l |
| form | Powder or Needles |
| Specific Gravity | 0.740 |
| color | APHA: ≤10 |
| Relative polarity | 0.124 |
| Odor | Characteristic ethereal odor |
| explosive limit | 1.5-8.5%(V) |
| Water Solubility | 51 g/L (20 ºC) |
| FreezingPoint | -108.6℃ |
| Thermal Conductivity | 0.12 W/(m·K) |
| Specific Heat Capacity | Cp(liquid): 2.13 J/(g·K), at 25℃ |
| λmax | λ: 210 nm Amax: 1.0 λ: 225 nm Amax: 0.50 λ: 250 nm Amax: 0.10 λ: 300-400 nm Amax: 0.005 |
| Merck | 14,6032 |
| BRN | 1730942 |
| Henry's Law Constant | 1.2×10-2 mol/(m3Pa) at 25℃, Schwardt et al. (2021) |
| Exposure limits | EU LTEL:50 ppm(183.5 mg/m3); EU STEL:100 ppm(367 mg/m3) |
| Dielectric constant | 4.5 |
| Stability: | Stable, but may form explosive peroxides in contact with air. Extremely flammable - note low flash point. Incompatible with strong oxidizing agents. |
| Cosmetics Ingredients Functions | SOLVENT |
| InChI | 1S/C5H12O/c1-5(2,3)6-4/h1-4H3 |
| InChIKey | BZLVMXJERCGZMT-UHFFFAOYSA-N |
| SMILES | COC(C)(C)C |
| LogP | 1.06 at 20℃ |
| Surface tension | 18.7mN/m at 293.15K |
| CAS DataBase Reference | 1634-04-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Propane, 2-methoxy-2-methyl-(1634-04-4) |
| IARC | 3 (Vol. 73) 1999 |
| EPA Substance Registry System | Methyl tert-butyl ether (1634-04-4) |
Safety Information
| Hazard Codes | Xn,F,Xi,T |
| Risk Statements | 36/37/38-40-38-11-39/23/24/25-23/24/25 |
| Safety Statements | 9-16-24-45-36/37-7 |
| RIDADR | UN 2398 |
| WGK Germany | 3 |
| RTECS | KN5250000 |
| F | 3-10 |
| Autoignition Temperature | 705 °F |
| TSCA | TSCA listed |
| HS Code | 2909 19 90 |
| HazardClass | 3 |
| PackingGroup | II |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Flam. Liq. 2 Skin Irrit. 2 |
| Hazardous Substances Data | 1634-04-4(Hazardous Substances Data) |
| Toxicity | . LC50 in mice (15 min): 1.6 mmol/liter of atmosphere (Marsh) |
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Product Application of tert-Butyl methyl ether CAS#1634-04-4
Methyl tert-butyl ether is primarily used in the production of high-octane gasoline blending components, which are important raw materials for fuel upgrading and gasoline additives. It is also used in the manufacture of organic synthesis solvents, extraction agents, and other specialty chemical products.
In addition, Methyl tert-butyl ether serves as an important oxygenated fuel additive in various petroleum refining and industrial processes. Its high octane rating and good miscibility with hydrocarbons allows it to participate in a wide range of fuel blending and organic synthesis processes, supporting applications across petroleum refining, fine chemical and solvent industries.
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