MTBE primarily used as a gasoline additive
Category
Tert-Butyl methyl ether, also known as MTBE or Methyl tert-butyl ether, is a clear, colorless liquid with a low viscosity that is combustible and has a distinct, turpentine-like odor. It is miscible with organic solvents, but only slightly soluble in water. Methyl tert-butyl ether is very stable under alkaline, neutral, and weakly acidic conditions. In the presence of strong acids, it is cleaved to methanol and isobutene. Depending on reaction conditions the latter can form isobutene oligomers.
Application
Applications:
- 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.tert-Butyl methyl ether (MTBE) is a gasoline additive.
- MTBE undergoes oxidative degradation in the presence of propane-oxidizing bacterial strains. The kinetic studies of heat-assisted persulfate oxidation of MTBE under various parameters suggests that the reaction follows the pseudo-first-order kinetics.
- MTBE can be synthesized by acid catalyzed reaction between methanol and isobutene. It is an effective alternative to lead containing additives for enhancing the octane rating of gasoline. A study suggests that the addition of MTBE increases the number of active sites during polymerization of propene by stopped-flow method.
- tert-Butyl methyl ether may be used to synthesize fatty acid methyl esters (FAMEs) and glycerol tert-butyl ether via transesterification with canola oil under supercritical conditions.
Dose
MTBE does not undergo autoxidation and, in contrast to other ethers, it does not form peroxides with atmospheric oxygen. It improves the antiknock properties when added to motor gasoline.ChEBI: Methyl tert-butyl ether is an ether having methyl and tert-butyl as the two alkyl components. It has a role as a non-polar solvent, a fuel additive and a metabolite.
Technical specifications
| PRODUCT NAME | : | METHYLTERTBUTYLETHER |
| CAS number | : | 1634-04-4 |
| UN number | : | 2398 |
| Formula | : | (CH3)3COCH |
| Odour | : | |
| Solubility in water | : | SLIGHTLY |
| Density | : | 0.74 at OC |
| Boiling point | : | 55 OC |
| Melting point | : | -109 OC |
| Viscosity | : | |
| Flashpoint | : | -28 OC |
| Explosive limits | : | 2.0 – 15.1 Vol% |
| Vapour pressure | : | 230 mbar at 20 OC |
| Skin absorption/irritation | : | YES |
| TLV Country | : | |
| Pollution category 1994 | : | D |
Note
MSDS
| Porduct Name | Methyl Tert Butyl Ether |
| Part Number | RXSOL-19-1381-210 |
Company Details:
RX MARINE INTERNATIONAL
105, A wing , BSEL , TECH PARK.
VASHI ,NEW BOMBAY 400703 INDIA
Branch : Kandla, Mumbai , Chennai, Vizag, Kolkata, UAE , OMAN , CANADA and KENYA
| Phone | +91 22 20871200 - 1400 |
| Fax | +91 22 27612100 :::AOH :0091 9821214367 |
| mail@rxmarine.com | |
| Website | www.rxmraine.com |
| Product name | Cas No | EC No | Weight | Formula |
| Tert-Butyl methyl ether | 1634-04-4 | 216-653-1 | 100% | C5H12O |
| Signal Word | Danger |
| Hazard Statements | H225 Highly flammable liquid and vapor. H315 Causes skin irritation. |
| Precautionary statements | 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. |
| Classification of the substance or mixture | No data available |
| Supplemental Hazard Statements | No data available |
| Other hazards | This substance/mixture contains no components considered to be either persistent, bioaccumulative and toxic (PBT), or very persistent and very bioaccumulative (vPvB) at levels of 0.1% or higher. |
| General advice | First aiders need to protect themselves. Show this material safety data sheet to the doctor in attendance. |
| If inhaled | After inhalationfresh air. |
| Eye Contact | After eye contact: rinse out with plenty of water. Immediately call in ophthalmologist. Remove contact lenses. |
| Swallowed | After swallowing: caution if victim vomits. Risk of aspiration! Keep airways free. Pulmonary failure possible after aspiration of vomit. Call a physician immediately. |
| Skin Contact | In case of skin contact Take off immediately all contaminated clothing. Rinse skin with water/ shower. Call a physician immediately. |
| Inhalation | No data available |
| Ingestion | No data available |
| Most important symptoms and effects, both acute and delaye | The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in section 11 |
| Indication of any immediate medical attention and special treatment needed | No data available |
| Flammability | No data available |
| Suitable extinguishing media | Water Foam Carbon dioxide (CO2) Dry powder |
| Unsuitable extinguishing media | For this substance/mixture no limitations of extinguishing agents are given. |
| Special hazards arising from the substance or mixture | Carbon oxides Combustible.Pay attention to flashback. Vapors are heavier than air and may spread along floors. Development of hazardous combustion gases or vapours possible in the event of fire. Forms explosive mixtures with air at ambient temperatures |
| Further information | Remove container from danger zone and cool with water. Prevent fire extinguishing water from contaminating surface water or the ground water system. |
|
Hazardous combustion products |
No data available |
| Advice for firefighters | Stay in danger area only with self-contained breathing apparatus. Prevent skin contact by keeping a safe distance or by wearing suitable protective clothing. |
| Protective Equipment | No data available |
| Specific Hazards Arising from the Chemical | No data available |
| Personal precautions, protective equipment and emergency procedures | Advice for non-emergency personnel: Do not breathe vapors, aerosols. Avoid substance contact. Ensure adequate ventilation. Keep away from heat and sources of ignition. Evacuate the danger area, observe emergency procedures, consult an expert. For personal protection see section 8. |
| Spillage | No data available |
| Personal Protection | No data available |
| Enviromental Precaution | Do not let product enter drains. Risk of explosion. |
|
Methods and materials for containment and cleaning |
Cover drains. Collect, bind, and pump off spills. Observe possible material restrictions (see sections 7 and 10). Take up with liquid-absorbent material (e.g. Chemizorb® ). Dispose of properly. Clean up affected area |
| Reference to other sections | For disposal see section 13. |
| Advice on protection against fire and explosion | Keep away from open flames, hot surfaces and sources of ignition.Take precautionary measures against static discharge. |
| Incompatible materials | No data available |
| Hygiene measures | Immediately change contaminated clothing. Apply preventive skin protection. Wash hands and face after working with substance. For precautions see section 2.2. |
| Advice on safe handling | Work under hood. Do not inhale substance/mixture. Avoid generation of vapours/aerosols. |
| Conditions for safe storage including any incompatibilities |
No data available |
| Storage conditions | Keep container tightly closed in a dry and well-ventilated place. Keep away from heat and sources of ignition. Protected from light.Keep container tightly closed in a dry and wellventilated place. Keep away from heat and sources of ignition. Recommended storage temperature see product label. |
| Storage class | Storage class (TRGS 510): 3: Flammable liquids |
| Specific end use(s) | Apart from the uses mentioned in section 1.2 no other specific uses are stipulated |
| Advice on general occupational hygiene | No data available |
| Exposure controls | Personal protective equipment |
| Engineering Control | No data available |
| Eye/face protection | Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Safety glasses |
| Body Protection | Flame retardant antistatic protective clothing. |
| Skin protection | This recommendation applies only to the product stated in the safety data sheet, supplied by us and for the designated use. When dissolving in or mixing with other substances and under conditions deviating from those stated in EN374 please contact the supplier of CE-approved gloves (e.g. KCL GmbH, D-36124 Eichenzell, Internet: www.kcl.de). Splash contactMaterial: Nitrile rubber Minimum layer thickness: 0,4 mm Break through time: 120 min Material tested:Camatril® (KCL 730 / Aldrich Z677442, Size M) |
| Respiratory protection |
required when vapours/aerosols are generated. Our recommendations on filtering respiratory protection are based on the following standards: DIN EN 143, DIN 14387 and other accompanying standards relating to the used respiratory protection system. Recommended Filter type: Filter type AX The entrepeneur has to ensure that maintenance, cleaning and testing of respiratory protective devices are carried out according to the instructions of the producer. These measures have to be properly documented.
|
| Other Protection Measure | No data available |
| Physical state | Liquid |
| Colour | Colorless |
| Odour | Characteristic |
| Odor Threshold | No data available |
| pH | No data available |
| Melting Point | -108,6 °C at 1.013 hPa |
| Boiling Point | 55,3 °C at 1.013 hPa |
| Flash Point | -28 °C - closed cup |
| Evaporation Rate | No data available |
| Flammability (solid, gas) | Chemically unstable at 20 °C temperature and a standard pressure of 101.3 kPa |
| Explosive limits | No data Available |
| Upper/lower flammability or explosive limits | Upper explosion limit: 8,5 %(V) Lower explosion limit: 1,6 %(V) |
| Autoignition temperature | 460 °C at 1013,0 hPa - DIN 51794 |
| Decomposition temperature | Distillable in an undecomposed state at normal pressure. |
| Vapour pressure | 330 hPa at 25 °C - OECD Test Guideline 104 |
| Viscosity | Kinematic: 0,409 mm2/s at 40 °C - OECD Test Guideline 1140,464 mm2/s at 20 °C - OECD Test Guideline 114 Dynamic: 0,36 mPa.s at 20 °C |
| Density | 0,74 g/cm3 at 20 °C. |
| Relative Density | 0,74 at 20 °C |
| Specific Gravity | No data available |
| Partition coefficient | log Pow: 1,06 at 20 °C - OECD Test Guideline 107 - Bioaccumulation is not expected. |
| Explosive properties | No data available |
| Solubility | 42 g/l at 20 °C - OECD Test Guideline 105 |
| Ignition temperature | No data available |
| Particle characteristics | No data available |
| Reactivity | Vapors may form explosive mixture with air. |
| Chemical stability | The product is chemically stable under standard ambient conditions (room temperature) |
| Possibilityof hazardous reactions | Violent reactions possible with: Oxidizing agents Strong acids halogens Strong bases |
| Conditions to avoid | Heat, flames and sparks. Warming. |
| Incompatible materials |
rubber, various plastics
|
| Hazardous decomposition products | Peroxides In the event of fire: see section 5 |
| Acute toxicity | Acute toxicity estimate Oral - > 2.000 mg/kg (Calculation method) LD50 Oral - Rat - male and female - > 2.000 mg/kg (tert-butyl methyl ether) (OECD Test Guideline 401) Symptoms: Nausea, Vomiting, Pulmonary failure possible after aspiration of vomit., Aspiration may cause pulmonary edema and pneumonitis. Acute toxicity estimate Inhalation - 4 h - > 20 mg/l - vapor(Calculation method) LC50 Inhalation - Rat - male and female - 4 h - 85 mg/l - vapor (tert-butyl methyl ether) (OECD Test Guideline 403) Symptoms: Possible damages:, mucosal irritations Acute toxicity estimate Dermal - > 2.000 mg/kg (Calculation method) LD50 Dermal - Rat - male and female - > 2.000 mg/kg (tert-butyl methyl ether) (OECD Test Guideline 402) |
| Skin corrosion/irritation | Skin - Rabbit (tert-butyl methyl ether) Result: Skin irritation - 4 h (OECD Test Guideline 404) Remarks: Drying-out effect resulting in rough and chapped skin |
| Serious eye damage/irritation | Eyes - Rabbit (tert-butyl methyl ether) Result: No eye irritation (OECD Test Guideline 405) |
| Respiratory or skin sensitization | Maximization Test - Guinea pig (tert-butyl methyl ether) Result: negative (OECD Test Guideline 406) |
| Carcinogenicity | No data available |
| Germ cell mutagenicity | Test Type: In vitro mammalian cell gene mutation test (tert-butyl methyl ether) Test system: Chinese hamster lung cells Metabolic activation: with and without metabolic activation Method: OECD Test Guideline 476 Result: negative Test Type: Ames test (tert-butyl methyl ether) Test system: Salmonella typhimurium Metabolic activation: with and without metabolic activation Method: OECD Test Guideline 471 Result: negative Test Type: Mutagenicity (mammal cell test): micronucleus. (tert-butyl methyl ether)Test system: mouse lymphoma cells Metabolic activation: without metabolic activation Method: OECD Test Guideline 473 Result: negative (tert-butyl methyl ether) Test Type: unscheduled DNA synthesis assay Species: Mouse Cell type: Liver cells Application Route: inhalation (vapor) Method: OECD Test Guideline 486 Result: negative (tert-butyl methyl ether) Test Type: Micronucleus test Species: Mouse Cell type: Bone marrow Application Route: inhalation (vapor) Method: US-EPA Result: negative (tert-butyl methyl ether) Test Type: Mutagenicity (mammal cell test): chromosome aberration. Species: Rat Cell type: Bone marrow Application Route: inhalation (vapor) Method: US-EPA Result: negative (tert-butyl methyl ether) Test Type: Transgenic rodent somatic cell gene mutation assay Species: Rat Cell type: Bone marrow Application Route: inhalation (vapor) Method: OECD Test Guideline 488 |
| Reproductive toxicity | No data available |
| Specific target organ toxicity - single exposure |
No data available
|
| Additional Information | The substance/mixture does not contain components considered to have endocrinedisrupting properties according to REACH Article 57(f) or Commission Delegated regulation (EU) 2017/2100 or Commission Regulation (EU) 2018/605 at levels of 0.1% or higher. Repeated dose toxicity - Rat - male and female - Oral - 90 d - NOAEL (No observed adverse effect level) - 3.000 mg/kg Remarks: Subchronic toxicity (tert-butyl methyl ether) Nausea, Vomiting, Dizziness, Central nervous system depression, Aspiration or inhalation may cause chemical pneumonitis., MTBE (methyl-tert-butyl ether) is reported to metabolize to tert-butyl alcohol and formaldehyde by microsomal demethylation, MTBE (methyl-tertbutyl ether) should be considered a "potential human carcinogen" due to an increase in leydig interstitial cell tumors of testes in male rats and an increase in lymphomas, leukemias, and uterine sarcomas in female rats., In another unpublished study MTBE was shown to be carcinogenic due to "increased incidence of a rare type of kidney tumor" in male rats and an "increase in the incidence of hepatocellular adenomas" in female mice. (tert-butyl methyl ether) To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated. (tert-butyl methyl ether) |
| Persistence and degradability | Biodegradability aerobic - Exposure time 28 d (tert-butyl methyl ether) Result: 0 % - Not readily biodegradable. (OECD Test Guideline 301D) |
| Toxicity to fish | Semi-static test LC50 - Menidia beryllina - 574 mg/l - 96 h (tertbutyl methyl ether) (OECD Test Guideline 203) |
| Toxicity to daphnia and other aquatic invertebrates | flow-through test EC50 - Americamysis bahia (Mysid) - 187 mg/l - 96 h (tert-butyl methyl ether) (US-EPA OPPTS 850.1035) |
| Toxicity | No data available |
| Toxicity to bacteria | Static test EC10 - Pseudomonas putida - 710 mg/l - 18 h (tert-butyl methyl ether) Remarks: (ECHA) |
| Toxicity to algae | Static test IC50 - Pseudokirchneriella subcapitata (green algae) - 491 mg/l - 96 h (tert-butyl methyl ether) |
| Bioaccumulation potential | Bioaccumulation Cyprinus carpio (Carp) - 28 d at 25 °C(tert-butyl methyl ether) Bioconcentration factor (BCF): 1,5 |
| Mobility in soil | No data availalble |
| Results of PBT and vPvB assessment | This substance/mixture contains no components considered to be either persistent, bioaccumulative and toxic (PBT), or very persistent and very bioaccumulative (vPvB) at levels of 0.1% or higher. |
| Endocrine disrupting properties | The substance/mixture does not contain components considered to have endocrine disrupting propertiesaccording to REACH Article 57(f) or Commission Delegated regulation (EU) 2017/2100 or Commission Regulation (EU) 2018/605 at levels of 0.1% or higher. |
| Other adverse effects | No data availalble |
| Product | See www.retrologistik.com for processes regarding the return of chemicals and containers, or contact us there if you have further questions |
| Contaminated packaging | No data available |
| Waste treatment Method | No data available |
| UN number | ADR/RID:2398 | IMDG:2398 |
IATA:2398 |
| UN proper shipping name | ADR/RID:METHYL tert-BUTYL ETHER | IMDG: METHYL tert-BUTYL ETHER | IATA:METHYL tert-BUTYL ETHER |
| Transport hazard class(es) | ADR/RID:3 | IMDG:3 | IATA:3 |
| Packaging group | ADR/RID:ll | IMDG:ll | IATA:ll |
| Environmental hazards | ADR/RID:No | IMDG:No | IATA:No |
| Special precautions for user | Tunnel restriction code (D/E) | ||
| Further information | No data available |
| Safety, health and environmental regulations/legislation specific for the substance or mixture | This material safety data sheet complies with the requirements of Regulation (EC) No. 1907/2006. |
| Other regulations | Take note of Dir 94/33/EC on the protection of young people at work |
| Chemical Safety Assessment | A Chemical Safety Assessment has been carried out for this substance. |
| Other Information |
The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and weassume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Rx Marine International has been advised of the possibility of such damages. DISCLAIMER OF LIABILITY :The information in this SDS was obtained from sources which we believe are reliable. However, the information is provided without any warranty, express or implied, regarding its correctness. The conditions or methods of handling, storage, use or disposal of the product are beyond our control and may be beyond our knowledge. For this and other reasons, we do not assume responsibility and expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the product. This MSDS was prepared and is to be used only for this product. If the product is used as a component in another product, this MSDS information may not be applicable. |