tert-Butyl methyl ether , >99%(GC) , 1634-04-4
Synonym(s):
MTBE;TBME;tert-Butyl methyl ether;Boc-Arg(Mtr)-OH;Methyl tert-butyl ether
CAS NO.：1634-04-4
Empirical Formula: C5H12O
Molecular Weight: 88.15
MDL number: MFCD00008812
EINECS: 216-653-1
PRODUCT Properties
| 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 | n |
| Flash point: | -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℃ |
| 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 |
| Exposure limits | ACGIH: TWA 50 ppm |
| 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. |
| InChIKey | BZLVMXJERCGZMT-UHFFFAOYSA-N |
| LogP | 1.06 at 20℃ |
Description and Uses
Methyl-tert-butyl ether is a colorless liquid. Molecular weight= 88.17;Boiling point=54℃; Freezing/ Melting point=109℃; Flash point=10℃. Hazard Identification (based on NFPA-704 M Rating System): Health 2, Flammability 3, Reactivity 1. Soluble in water.
Methyl tert-butyl ether (MTBE) was primarily used as a gasoline additive in unleaded gasoline in the United States prior to 2005, in the manufacture of isobutene, and as a chromatographic eluent especially in high pressure liquid chromatography. It is also a pharmaceutical agent and can be injected into the gallbladder to dissolve gallstones (ATSDR, 1996). tert-Butyl methyl ether is also used in the petrochemical industry. By reversal of its formation reaction, MTBE can be cracked to isobutene and methanol on acidic catalysts at higher temperature than MTBE synthesis.
Safety
| Symbol(GHS) |   GHS02,GHS07 |
| Signal word | Danger |
| Hazard statements | H225-H315 |
| Precautionary statements | P210-P233-P240-P241-P242-P303+P361+P353 |
| 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 3/PG 2 |
| WGK Germany | 3 |
| RTECS | KN5250000 |
| F | 3-10 |
| Autoignition Temperature | 705 °F |
| TSCA | Yes |
| HS Code | 2909 19 90 |
| HazardClass | 3 |
| PackingGroup | II |
| Toxicity | . LC50 in mice (15 min): 1.6 mmol/liter of atmosphere (Marsh) |
