Methyl tert-butyl ether
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.
- Synonyms: MTBE, MTB, 2-Methoxy-2-methylpropane, Methyl tert-butyl ether
- CAS #: 1634-04-4
- EC Number: 216-653-1
- Molar Mass: 88.15 g/mol
- Chemical Formula: (CH₃)₃COCH₃
- Hill Formula: C₅H₁₂O
Description
Methyl tertiary-butyl ether (MTBE), also known as methyl tert-butyl ether and tert-butyl methyl ether, is an organic compound with a structural formula (CH3)3COCH3. MTBE is a volatile, flammable, and colorless liquid that is sparingly soluble in water. Primarily used as a fuel additive, MTBE is blended into gasoline to increase its octane rating and knock resistance, and reduce unwanted emissions.
tert-Butyl Methyl Ether for HPLC, 99.5%
HSN Code : 29091990
Molecular Weight : 88.15
Storage : Room Temperature
Shelf Life : 36 Months
Key Spec Table
| CAS # | EC Number | Hill Formula | Chemical Formula | Molar Mass |
|---|---|---|---|---|
| 1634-04-4 | 216-653-1 | C₅H₁₂O | (CH₃)₃COCH₃ | 88.15 g/mol |
About This Substance
Helpful information
This substance is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
| Description | |
|---|---|
| Catalogue Number | JY2301241809 |
| Synonyms | MTBE, MTB, 2-Methoxy-2-methylpropane, Methyl tert-butyl ether |
| Description | tert-Butyl methyl ether |
Consumer Uses
This substance is used in the following products: fuels.
Other release to the environment of this substance is likely to occur from: outdoor use, indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners), indoor use in close systems with minimal release (e.g. cooling liquids in refrigerators, oil-based electric heaters) and outdoor use in close systems with minimal release (e.g. hydraulic liquids in automotive suspension, lubricants in motor oil and break fluids).
| Product Information | |
|---|---|
| CAS number | 1634-04-4 |
| EC index number | 603-181-00-X |
| EC number | 216-653-1 |
| Hill Formula | C₅H₁₂O |
| Chemical formula | (CH₃)₃COCH₃ |
| Molar Mass | 88.15 g/mol |
| HS Code | 2909 19 90 |
| Structure formula Image |  |
Article service life
Other release to the environment of this substance is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials).
This substance can be found in complex articles, with no release intended: vehicles.
Methyl-t-Butyl Ether, AR
– For general analytical applications
– Purity meets the requirement of ACS Standard
Synonym: Tert-Butyl methyl ether, 1, 1-Dimethylethyl methyl ether, 2-Methoxy-2-methylpropane, Methyl-1,1-dimethylethyl ether, tert-Butoxymethane, 2-Methyl-2-methoxypropane, MtBE, 2-Methyl butane-2-ol
Widespread uses by professional workers
This substance is used in the following products: fuels and laboratory chemicals. This substance is used in the following areas: health services and scientific research and development. This substance is used for the manufacture of: and chemicals. Other release to the environment of this substance is likely to occur from: outdoor use and indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners).
| Physicochemical Information | |
|---|---|
| Boiling point | 55.3 °C (1013 hPa) |
| Density | 0.74 g/cm3 (20 °C) |
| Explosion limit | 1.5 – 8.5 %(V) |
| Flash point | -28 °C |
| Ignition temperature | 460 °C |
| Melting Point | -108.6 °C |
| Vapor pressure | 330 hPa (25 °C) |
| Viscosity kinematic | 0.409 mm2/s (40 °C) no data available |
| Solubility | 42 g/l |
| Toxicological Information | |
|---|---|
| LD 50 oral | LD50 Rat > 2000 mg/kg |
| LD 50 dermal | LD50 Rabbit > 2000 mg/kg |
Formulation or re-packing
This substance is used in the following products: fuels and laboratory chemicals.
Release to the environment of this substance can occur from industrial use: formulation of mixtures and manufacturing of the substance.
Uses at industrial sites
This substance is used in the following products: pharmaceuticals, perfumes and fragrances, laboratory chemicals, fuels and pH regulators and water treatment products.
This substance has an industrial use resulting in manufacture of another substance (use of intermediates).
This substance is used in the following areas: formulation of mixtures and/or re-packaging.
This substance is used for the manufacture of: chemicals and rubber products.
Release to the environment of this substance can occur from industrial use: in processing aids at industrial sites, as an intermediate step in further manufacturing of another substance (use of intermediates), of substances in closed systems with minimal release, as processing aid and as processing aid.
Other release to the environment of this substance is likely to occur from: indoor use as reactive substance.
| Hazard Statement(s) | H225: Highly flammable liquid and vapour. H315: Causes skin irritation. |
| Precautionary Statement(s) | 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. P241: Use explosion-proof electrical/ ventilating/ lighting equipment. P242: Use non-sparking tools. P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P403 + P233: Store in a well-ventilated place. Keep container tightly closed. |
| Signal Word | Danger |
| RTECS | KN5250000 |
| Storage class | 3 Flammable liquids |
| WGK | WGK 1 slightly hazardous to water |
| Disposal | 1 Strongly contaminated halogen-free organic solvents: container A. |
| Safety Information | |
|---|---|
| Categories of danger | highly flammable, irritant |
| Storage and Shipping Information | |
|---|---|
| Storage | Store at +2°C to +30°C. |
| Transport Information | |
|---|---|
| Declaration (railroad and road) ADR, RID | UN 2398 , 3, II |
| Declaration (transport by air) IATA-DGR | UN 2398 , 3, II |
| Declaration (transport by sea) IMDG-Code | UN 2398 , 3, II |
| Specifications | |
|---|---|
| Purity (GC) | ≥ 99.9 % |
| Evaporation residue | ≤ 0.0002 % |
| Water | ≤ 0.01 % |
| Color | ≤ 10 Hazen |
| Acidity | ≤ 0.0002 meq/g |
| Alkalinity | ≤ 0.0002 meq/g |
| Fluorescence (as quinine at 254 nm) | ≤ 1.0 ppb |
| Fluorescence (as quinine at 365 nm) | ≤ 1.0 ppb |
| Transmission (at 215 nm) | ≥ 40 % |
| Transmission (at 235 nm) | ≥ 55 % |
| Transmission (at 240 nm) | ≥ 60 % |
| Transmission (at 255 nm) | ≥ 85 % |
| Transmission (at 260 nm) | ≥ 90 % |
| Transmission (from 280 nm) | ≥ 98 % |
| Absorbance (at 215 nm) | ≤ 0.40 |
| Absorbance (at 235 nm) | ≤ 0.26 |
| Absorbance (at 240 nm) | ≤ 0.22 |
| Absorbance (at 255 nm) | ≤ 0.07 |
| Absorbance (at 260 nm) | ≤ 0.05 |
| Absorbance (from 280 nm) | ≤ 0.01 |
Manufacture
Release to the environment of this substance can occur from industrial use: manufacturing of the substance and formulation of mixtures.
Danger! According to the harmonised classification and labelling (CLP00) approved by the European Union, this substance is a highly flammable liquid and vapour and causes skin irritation.
|
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| Formula | C5H12O |
| Net Charge | 0 |
| Average Mass | 88.14820 |
| Monoisotopic Mass | 88.08882 |
| InChI | InChI=1S/C5H12O/c1-5(2,3)6-4/h1-4H3 |
| InChIKey | BZLVMXJERCGZMT-UHFFFAOYSA-N |
| SMILES | COC(C)(C)C |
| Roles Classification | |
| Chemical Role(s): | non-polar solvent
fuel additive Any additive that enhances the efficiency of fuel.
|
| Biological Role(s): | metabolite
Any intermediate or product resulting from metabolism. The term ‘metabolite’ subsumes the classes commonly known as primary and secondary metabolites.
|
| Application(s): | non-polar solvent |
| IUPAC Name |
| tert-butyl methyl ether |
HIGH PURITY- METHYL TERTIARY BUTYL ETHER (HP-MTBE), CAS 1634-04-4
Methyl Tertiary Butyl Ether (MTBE)
Formed by the blending of chemicals like methanol and isobutylene, Methyl tert-butyl ether (MTBE) is a colorless liquid and has a distinctive odour. The vapors of this chemical are denser than both narcotic and air. The boiling point of MTBE is 131-degree F with the flashpoint being 18-degree F. MTBE is miscible in water as it is less dense than water. This is why this chemical can be used as an octane booster for gasoline.
Methyl tert-butyl ether (MTBE) has been used since the 1980s as an additive to achieve a more efficient burning, especially for unleaded petrol. It can also be used for medical reasons to dissolve the gall bladder stone. MTBE is directly delivered to the patient’s gall bladder with the help of tubes. The tubes are surgically inserted into the patient for safety reasons.
Methyl and tert butyl are the two-alkyl components in methyl butyl ether. This solution is a metabolite, a fuel additive and a non-polar solvent. When combined with gasoline, MTBE is known to increase the oxygen and octane levels and reduce pollution, which is remarkable.
Methyl tert-butyl ether (MTBE) has several medical applications as well and is used as a solvent for synthesizing APIs.
| Synonyms | Sources |
| 2-Methoxy-2-methylpropane | ChemIDplus |
| 2-Methyl-2-methoxypropane | ChemIDplus |
| Methyl 1,1-dimethylethyl ether | NIST Chemistry WebBook |
| Methyl t-butyl ether | ChemIDplus |
| Methyl tert-butyl ether | KEGG COMPOUND |
| Methyl tertiary-butyl ether | ChemIDplus |
| MTBE | ChEBI |
| t-Butyl methyl ether | ChemIDplus |
| tert-Butyl methyl ether | KEGG COMPOUND |
| tert-C4H9OCH3 | NIST Chemistry WebBook |
| Registry Numbers | Types | Sources |
| 1634-04-4 | CAS Registry Number | ChemIDplus |
| 1730942 | Beilstein Registry Number | Beilstein |
| 1730942 | Reaxys Registry Number | Reaxys |
| 773738 | Gmelin Registry Number | Gmelin |
TYPICAL SPECIFICATIONS
| MARKET: | Reagents, Solvents, Featured Stocked Products |
|---|---|
| MOLECULAR WEIGHT: | 88.15 |
| APPEARANCE: | Colorless liquid |
| DENSITY: | 0.74 g/cm3 |
| REFRACTIVE INDEX: | 1.369 |
| ASSAY: | 99.8 % |
| WATER CONTENT: | <0.003 % |
| BOILING POINT: | 55 – 56 °C |
| MELTING POINT: | -110 °C |
| FLASH POINT: | -28 °C |
Methyl Tertiary Butyl Ether
| Purity % |
98%
|
| Usage/Application |
Laboratory
|
| Chemical Formula |
C5H12O
|
| Physical State |
Liquid
|
| Density |
740 kg/m3
|
| Boiling Point |
55.2degC
|
| Solubility in water |
26 kg/m3
|
Technical Specifications
| Supplier | Junyuan Petroleum Group |
| Grade | Analytical |
| Packaging | Drum |
| Pack Size | 200L drum |
| CAS No | 1634-04-4 |
Technical data
- MELTING POINT: -109 °C
- BOILING POINT: 55.2 °C
- DENSITY: 0.740 kg/l
- SOLUBILITY: water 51 g/l at 20 °C
- REFRACTIVE INDEX: 20/D 1.3689
- PHYSICAL DESCRIPTION: liquid
- PRODUCT CODE: JY2301241809
- PRODUCT NAME: tert-Butyl Methyl Ether for analysis, ACS
- QUALITY NAME: for analysis, ACS
- SPECIFICATIONS:
- Minimum assay (G.C.): 99.8%
Identity: IR passes test
Density 20/4: 0.739-0.742
Refractive Index n 20/D: 1.368-1.370Maximum limit of impurities
APHA colour: 10
Acidity: 0.0005 meq/g
Alkalinity: 0.0002 meq/g
Non-volatile matter: 0.001 %
Peroxides (as H2O2): 0.0001 %*
2-Methyl-2-Propanol (G.C.): 0.05%
Aldehydes (as HCHO): 0.001%
Methanol (G.C.): 0.01%
Water (H2O): 0.03 %
UV Spectrum (1cm cell; Ref.: water):
Transmittance at 240 nm: ≥50%
Transmittance at 255 nm: ≥80%
Transmittance at 280 nm: ≥98%
Al: 0.0005 %
Ca: 0.00005 %
Cd: 0.000005 %
Co: 0.000002 %
Cr: 0.000002 %
Cu: 0.000002 %
Fe: 0.00001 %
Mg: 0.00001 %
Mn: 0.000002 %
Ni: 0.000002 %
Pb: 0.00001 %
Zn: 0.00001 %
* At the moment of the batch analysis.
- HAZARD PICTOGRAMS
- UN: 2398
- CLASS/PG: 3/II
- ADR: 3/II
- IMDG: 3/II
- IATA: 3/II
- WGK: 1
- STORAGE: Room Temperature.
- SIGNAL WORD: Danger
- GHS SYMBOLS:
- GHS02
GHS07 - H PHRASES:
- H225
H315 - P PHRASES:
- P210
P233
P240
P241
P242
P243
P264
P280
P302+P352
P303+P361+P353
P321
P332+P313
P362
P370+P378
P403+P235
P501 - MASTER NAME: tert-Butyl Methyl Ether
- SYNONYMS LONG TEXT: 1,1-Dimethyl ethyl methyl ether, 2-Methoxy-2-Methylpropane, Methyl-ter-Butyl Ether, MTB, MTBE
- EINECS: 216-653-1
- CS: 29091990
- INDEX NR.: 603-181-00-X
Junyuan Petroleum Group’s Methyl tert-butyl ether, for HPLC, 99.7% Cas 1634-04-4 – used as an oxygenate to raise the octane number and to replace tetraethyllead (TEL).
| Common Name | Methyl-tert-butyl ether |
|---|---|
| Description | Methyl-tert-butyl ether, also known as tert-butyl methyl ether, methyl t-butyl ether or MTBE, is classified as a member of the dialkyl ethers. Dialkyl ethers are organic compounds containing the dialkyl ether functional group, with the formula ROR’, where R and R’ are alkyl groups. Methyl-tert-butyl ether is considered to be soluble (in water) and basic. It is used as a gasoline additive. Exposure may occur by breathing air contaminated with auto exhaust or gasoline fumes while refueling autos. Respiratory irritation, dizziness, and disorientation have been reported by some motorists and occupationally exposed workers. Acute (short-term) exposure of humans to methyl tert-butyl ether also has occurred during its use as a medical treatment to dissolve cholesterol gallstones. Chronic (long-term) inhalation exposure to methyl-tert-butyl ether has resulted in central nervous system (CNS) effects, respiratory irritation, liver and kidney effects, and decreased body weight gain in animals. United States Environmental Protection Agency has not classified methyl-tert-butyl ether with respect to potential carcinogenicity. (ChemoSummarizer) |
CAS name: tert.-butyl methyl ether
CAS number: 1634-04-4
Formula: C5H12O
Synonyms:
MTBE
Methyl-tert.-butylether
2-Methyl-2-methoxypropane
C4 Chemicals
Fuel
Physical and Chemical Properties of MTBE:
| CAS number: | 1634-04-4 |
| Chemical formula: | C5H12O |
| Molar mass: | 88.150 g·mol−1 |
| Appearance: | colourless liquid |
| Density: | 0.7404 g/cm³ |
| Melting point: | −109 °C (−164 °F; 164 K) |
| Boiling point: | 55.2 °C (131.4 °F; 328.3 K) |
| Solubility in water: | 26 g/L (20 °C)[1] |
| Viscosity: | 0.36 cP at 25 °C |
Molecular weight: 88.15 g/mol
Comment Methyl-tert-butyl ether/MTBE is a flammable, non auto-oxidizable, clear, colourless liquid of low viscosity with a characteristic terpene-like odour. It is miscible with organic solvents in all ratios, partly miscible with water. MTBE is chemically stable in alkaline medium as well as in the presence of weak acids, air and oxygen.
Application: organic compound, Ether of acyclic hydrocarbon, Fuel additive, octane improver, Automotive, Automotive and car making
Description: MTBE is mainly a component in gasoline enhancing octane properties. A minor use for high purity MTBE is as a process solvent for production of various products.
-
- SPECIFICATIONS
| Assay % | : | 99.8% |
| Assay Notes | : | HPLC/Spectro |
| Boiling Point | : | 56°C |
| Chemical Formula | : | (CH3)3COCH3 |
| Color | : | Colorless |
| Flash Point | : | -28°C |
| Melting Point | : | -110°C |
| Molecular Weight | : | 88.15g/mol |
| Packaging Type | : | Steel Drum |
| Physical State | : | Liquid |
| Refractive Index | : | 1.36nD |
| Shelf Life | : | 36 Months |
| Size | : | 200L |
| Solubility Information | : | Soluble in Water |
| Synonyms | : | MTBE, Methyl t-Butyl Ether, 2-Methoxy-2-methylpropane, t-Butyl Methyl Ether, Methyl 1,1-dimethyl Ethyl Ether |
| Lot Purity |
|
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|---|---|---|---|---|---|
| Lot Expiration |
|
||||
| Alternate Name(s) | Methyl tert-butyl ether, MTBE | ||||
| Stock Status | In Stock | ||||
| Size | 200L | ||||
| Molecular Formula | C5-H12-O | ||||
| Molecular Weight | 88.15 | ||||
| Concentration and Solvent | density = 0.7404 | ||||
| Sample COA | Please email us for the details. |
Storage & Transport Information
Storage Temperature: +20°C
Shipping Temperature: +20°C
Country of Origin: CHINA
Transport Restrictions: Air Excepted
Tariff Code: 29051100
Product Description
| Catalogue Number | JY2301241809 |
| Chemical Name | tert-Butyl Methyl Ether |
| Synonyms | 1,1-Dimethylethyl Methyl Ether; 2-Methoxy-2-methylpropane; 2-Methyl-2-methoxypropane; MTBE; Methyl 1,1-dimethylethyl Ether; Methyl tert-Butyl Ether; Methyl Tertiary Butyl Ether; tert-Butoxymethane; tert-Butyl Methyl Ether |
| CAS Number | 1634-04-4 |
| Molecular Formula | C₅H₁₂O |
| Appearance | Colourless Liquid |
| Molecular Weight | 88.15 |
| Storage | 20°C |
| Solubility | Most Organic Solvents |
| Stability | Volatile |
| Category | Building Blocks; Miscellaneous; |
| Applications | tert-Butyl Methyl Ether is used in the preparation of gasolines, acting as an oxygenate to improve octane index and combustion efficiency (1). A mutagenic component of the mixtures present in the environment through degredation (2). Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA), environmental, and food contaminants. |
| Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package |
tert-Butyl methyl ether, HPLC Grade, 99+%
Chemical Properties
Grade Specifications
Applications
Used as a Chromatography solvent. Acts as a fuel component in fuel for gasoline engines. They raise the oxygen content of gasoline(oxygenates).
Notes
GHS Hazard and Precautionary Statements
Hazard Statements: H225-H303-H315
Highly flammable liquid and vapour. May be harmful if swallowed. Causes skin irritation.
Precautionary Statements: P210-P240-P241-P242-P243-P261-P264b-P270-P271-P280-P303+P361+P353-P304+P340-P305+P351+P338-P312-P362+P364-P403+P233-P501c
Keep away from heat/sparks/open flames/hot surfaces. – No smoking. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. Take off contaminated clothing and wash before reuse. And wash it before reuse. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/ container to an approved waste disposal plant.
Other References
Specifications
| Property | Value |
|---|---|
| Purity (GC) | Min. 99.85 % |
| IR spectrum | complying |
| Non-volatile matter | Max. 0.0001 % |
| Water (Karl Fischer) | Max. 0.02 % |
| Absorbance at 400 nm | Max. 0.005 |
| Absorbance at 300 nm | Max. 0.005 |
| Absorbance at 250 nm | Max. 0.10 |
| Absorbance at 225 nm | Max. 0.50 |
| Absorbance at 210 nm | Max. 1.0 |
| Fluorescence (chinin) at 365 nm | Max. 1.0 ppb |
| GC (as heptachlor epoxide) | Max. 10 ng/l |
| Refractive Index | n20/D 1.369(lit.) |
| Autoignition Temperature | 705 °F |
Properties
| Property | Value |
|---|---|
| Boiling Point/Range | 55.3 °C (1.013 hPa) |
| Color | Colorless |
| Density | 0.74 g/cm3 (20 °C) |
| Flashpoint | 8.5 %(V) |
| For Use With (Equipment) | For HPLC |
| Form | Liquid |
| Grade | Standard HPLC Solvents |
| Incompatible Materials | Oxidizing agents, Strong acids, Strong bases, Halogens |
| Lower Explosion Limit | 1.5 %(V) |
| Melting Point/Range | -109 °C |
| Partition Coefficient | 1.06 (20 °C) |
| Purity Percentage | 99.9 |
| Purity Details | >=99.9% |
| Solubility in Water | 42 g/l (20 °C) |
| Upper Explosion Limit | 8.5 %(V) |
| Vapor Pressure | 330 hPa (25 °C) |
| Viscosity | 0.36 mPa.s (20 °C) |
| pH-Value | Not applicable |
| Product Line | Junyuan Petroleum Group |
| Storage Temperature | Ambient |
Safety Information
| Property | Value |
|---|---|
| Hazard Class | 3 |
| Package Group | II |
| UN ID | UN2398 |
Further details of MTBE
Methyl tert-butyl ether (MTBE) is often found in several water sources, especially in urban areas, because of the leaks in the underground storage tanks of gasoline. MTBE can be felt in the air nearby if there are fuel facilities. The air gets exposed to this chemical when people are fuelling their vehicles.
Methyl tert-butyl ether is an essential chemical that is being used in several industries around the globe. There are several benefits of MTBE. In addition, purity and superior quality MTBE can be used for several purposes in the industries to reach the desired goals.
Junyuan Petroleum Group is the world leader in the manufacturing and supply of the methyl tert-butyl ether. We produce high purity MTBE and supply it across the globe for a wide variety of applications.
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