methyl tert-butyl ether 1634-04-4 MSDS
Name: tert-Butyl methyl ether 99% Material Safety Data Sheet
Synonym: t-Butyl methyl ether; MBE; 2-Methoxy-2-methylpropane; 2-Methyl-2-methoxypropane; MTBE; Methyl t-butyl ether
CAS: 1634-04-4
Section 1 - Chemical Product   MSDS Name:tert-Butyl methyl ether 99% Material Safety Data Sheet
Synonym:t-Butyl methyl ether; MBE; 2-Methoxy-2-methylpropane; 2-Methyl-2-methoxypropane; MTBE; Methyl t-butyl ether

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
1634-04-4 tert-Butyl methyl ether 99 216-653-1
Hazard Symbols: XI F
Risk Phrases: 11 19 38

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable. May form explosive peroxides. Irritating to skin.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. A single prolonged skin exposure is not likely to result in the material being absorbed in harmful amounts.
Ingestion:
May cause effects similar to those for inhalation exposure.
Aspiration of material into the lungs may cause chemical pneumonitis, which may be fatal.
Inhalation:
Causes respiratory tract irritation. May cause kidney damage. May cause drowsiness, unconsciousness, and central nervous system depression. Vapors may cause dizziness or suffocation.
Chronic:
Chronic inhalation may cause effects similar to those of acute inhalation. May cause cancer according to animal studies. Adverse reproductive effects have been reported in animals.

Section 4 - FIRST AID MEASURES
  Eyes: In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical aid.
Skin:
In case of contact, flush skin with plenty of water. Remove contaminated clothing and shoes. Get medical aid if irritation develops and persists. Wash clothing before reuse.
Ingestion:
Potential for aspiration if swallowed. Get medical aid immediately.
Do not induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustion generates toxic fumes. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. May form explosive peroxides. Extremely flammable liquid and vapor. Vapor may cause flash fire. This liquid floats on water and may travel to a source of ignition and spread fire.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Water may be ineffective. Do NOT use straight streams of water.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Remove all sources of ignition.
Provide ventilation. A vapor suppressing foam may be used to reduce vapors.

Section 7 - HANDLING and STORAGE
  Handling:
Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid ingestion and inhalation. If peroxide formation is suspected, do not open or move container. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Use only with adequate ventilation.
Keep away from heat, sparks and flame. Do not allow to evaporate to near dryness.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. In the presence of atmospheric oxygen, ethers generally form unstable peroxides, but no peroxides were detected in unstabilized MTBE after storage for 52 months. MTBE has a significantly decreased formation of peroxides compared with other ethers.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits. Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower.
Exposure Limits CAS# 1634-04-4: United Kingdom, WEL - TWA: 25 ppm TWA; 92 mg/m3 TWA United Kingdom, WEL - STEL: 75 ppm STEL; 275 mg/m3 STEL Belgium - TWA: 40 ppm VLE; 146 mg/m3 VLE Germany: 50 ppm TWA; 180 mg/m3 TWA Malaysia: 40 ppm TWA; 144 mg/m3 TWA Netherlands: 100 ppm STEL; 360 mg/m3 STEL Netherlands: 50 ppm MAC; 180 mg/m3 MAC Russia: 100 mg/m3 TWA Spain: 40 ppm VLA-ED; 147 mg/m3 VLA-ED Personal Protective Equipment Eyes: Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin exposure. Chemical-resistant nitrile rubber gloves should be worn during routine handling. Disposable nitrile gloves may be suggested for intermittent use.
PVC, Neoprene, Viton, Butyl or natural rubber are NOT recommended.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: clear, colorless
Odor: hydrocarbon-like - unpleasant odor
pH: Not available.
Vapor Pressure: 249 mm Hg @ 25 deg C
Viscosity: Not available.
Boiling Point: 55.2 deg C
Freezing/Melting Point: -109 deg C
Autoignition Temperature: 435 deg C ( 815.00 deg F)
Flash Point: -28 deg C ( -18.40 deg F)
Explosion Limits, lower: 1.6%
Explosion Limits, upper: 8.4%
Decomposition Temperature: Not available.
Solubility in water: 4.8g/100g water
Specific Gravity/Density: 0.74 (water=1)
Molecular Formula: C5H12O
Molecular Weight: 88.15

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable at room temperature in closed containers under normal storage and handling conditions. Under normal storage conditions, peroxidizable compounds can form and accumulate peroxides which may explode when subjected to heat or shock. This material is most hazardous when peroxide levels are concentrated by distillation or evaporation.
Conditions to Avoid:
Ignition sources, excess heat, prolonged exposure to air.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong acids.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide, formic acid, butyl formate, methyl radicals, acetone.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 1634-04-4: KN5250000 LD50/LC50:
CAS# 1634-04-4: Inhalation, mouse: LC50 = 141 gm/m3/15M; Inhalation, mouse: LC50 = 28000 mg/m3/2H; Inhalation, rat: LC50 = 23576 ppm/4H; Inhalation, rat: LC50 = 41000 mg/m3/4H; Oral, mouse: LD50 = 5960 uL/kg; Oral, rat: LD50 = 4 gm/kg.
Carcinogenicity:
tert-Butyl methyl ether - ACGIH: A3 - Confirmed animal carcinogen with unknown relevance to Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Fish: Fathead Minnow: LC50 = 110 mg/L; 96 Hr.; UnspecifiedFish: Fathead Minnow: LC50 = 706 mg/L; 30 days old; Flow-through; 24-26 degreesBacteria: Phytobacterium phosphoreum: EC50 = 11.4-55 mg/L; 5,15,30 minutes; Microtox test; 15 degrees C

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: METHYL-tert-BUTYL ETHER
Hazard Class: 3
UN Number: 2398
Packing Group: II
IMO
Shipping Name: METHYL-tertiary-BUTYL ETHER
Hazard Class: 3.1
UN Number: 2398
Packing Group: II
RID/ADR
Shipping Name: METHYL-tert-BUTYL ETHER
Hazard Class: 3
UN Number: 2398
Packing group: II
USA RQ: CAS# 1634-04-4: 1000 lb final RQ; 454 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI F
Risk Phrases:
R 11 Highly flammable.
R 19 May form explosive peroxides.
R 38 Irritating to skin.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 33 Take precautionary measures against static
discharges.
S 37 Wear suitable gloves.
WGK (Water Danger/Protection)
CAS# 1634-04-4: 1
Canada
CAS# 1634-04-4 is listed on Canada's DSL List.
CAS# 1634-04-4 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 1634-04-4 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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