1634-04-4
Product Name:
tert-Butyl methyl ether
Formula:
C5H12O
Synonyms:
MTBE;TBME;tert-Butyl methyl ether;Boc-Arg(Mtr)-OH;Methyl tert-butyl ether
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Methyl tert-butyl ether appears as a colorless liquid with a distinctive anesthetic-like odor. Vapors are heavier than air and narcotic. Boiling point 131 °F. Flash point 18 °F. Less dense than water and miscible in water. Used as a octane booster in gasoline. |
|---|---|
| Color/Form | Liquid |
| Odor | Terpene-like odor |
| Boiling Point | 131.4 °F at 760 mmHg (USCG, 1999) |
| Melting Point | -164.2 °F (USCG, 1999) |
| Flash Point | -14 °F (USCG, 1999) |
| Solubility | Solubility of water in methyl t-butyl ether: 1.5 g/100 g; unstable in acid solution |
| Density | 0.7405 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density | Relative vapor density (air = 1): 3.0 |
| Vapor Pressure | 250.0 [mmHg] |
| LogP | log Kow = 0.94 |
| Henry's Law Constant | Henry's Law constant = 5.87X10-4 atm-cu m/mole at 25 °C |
| Stability/Shelf Life | Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. |
| Autoignition Temperature | 435 °C |
| Decomposition | When heated to decomposition it emits acrid smoke and irritating fumes. |
| Heat of Combustion | 101,000 btu/gal at 25 °C (804 kcal/mole) |
| Heat of Vaporization | 145 btu/lb at 55 °C (7 kcal/mole) |
| Odor Threshold | Odor Threshold Low: 0.05 [mmHg] Odor Threshold High: 0.13 [mmHg] Odor thresholds from CHEMINFO |
| Refractive Index | Index of refraction = 1.3664 at 25 °C/D |
| Dissociation Constants | pKa = -3.70 |
| Kovats Retention Index | 570.12 562.7 563.7 568 562 566 566 567 563 568.3 556 570 554 556.1 561.3 560 556 556 556 558 560 |
| Other Experimental Properties | Specific gravity: 0.741 at 20 °C/4 °C |
| Chemical Classes | Solvents -> Ethers (<C12) |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H225:Flammable liquids H315:Skin corrosion/irritation |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P233:Keep container tightly closed. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P242:Use only non-sparking tools. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
COMPUTED DESCRIPTORS
| Molecular Weight | 88.15 g/mol |
|---|---|
| XLogP3 | 0.9 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 1 |
| Rotatable Bond Count | 1 |
| Exact Mass | 88.088815002 g/mol |
| Monoisotopic Mass | 88.088815002 g/mol |
| Topological Polar Surface Area | 9.2 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 33.7 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Methyl tert-butyl ether (MTBE) is a flammable liquid with a distinctive, disagreeable odor. It is made from blending chemicals such as isobutylene and methanol, and has been used since the 1980s as an additive for unleaded gasolines to achieve more efficient burning.MTBE is also used to dissolve gallstones. Patients treated in this way have MTBE delivered directly to their gall bladders through special tubes that are surgically inserted.