1,3,5-trimethylbenzene 108-67-8 MSDS
Name: Mesitylene Material Safety Data Sheet
Synonym: 1,3,5-Trimethylbenzen
CAS: 108-67-8
Section 1 - Chemical Product   MSDS Name:Mesitylene Material Safety Data Sheet
Synonym:1,3,5-Trimethylbenzen

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
108-67-8 1,3,5-trimethylbenzene ca. 100 203-604-4
Hazard Symbols: XI F N
Risk Phrases: 10 37 51/53

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Flammable. Irritating to respiratory system. Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
May cause skin irritation. Excessive drying of the skin may result from repeated or prolonged contact.
Ingestion:
May cause irritation of the digestive tract.
Inhalation:
Causes respiratory tract irritation. May cause anemia. May cause drowsiness, unconsciousness, and central nervous system depression.
Vapors may cause dizziness or suffocation. May cause asthma-like symptoms and sleepiness.
Chronic:
Prolonged or repeated skin contact may cause irritation. Chronic inhalation may cause effects similar to those of acute inhalation.

Section 4 - FIRST AID MEASURES
  Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid if irritation develops or persists. Wash clothing before reuse. Flush skin with plenty of soap and water.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical aid.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

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. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. Will burn if involved in a fire. Flammable Liquid. Can release vapors that form explosive mixtures at temperatures above the flashpoint. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas.
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. Use water spray to cool fire-exposed containers. 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. Remove all sources of ignition.
Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Use only in a well-ventilated area.
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. Keep away from heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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.
Flammables-area.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 108-67-8: United Kingdom, OES - TWA: (listed as trimethyl benzene): 25 ppm 125 mg/m3 TWA Belgium - TWA: (listed as trimethyl benzene): 20 ppm VLE; 120 mg/ VLE France - VME: (listed as trimethyl benzene): 25 ppm VME; 125 mg/m VME Germany: 20 ppm TWA; 100 mg/m3 TWA Japan: 25 ppm OEL; 120 mg/m3 OEL Malaysia: (listed as trimethyl benzene): 25 ppm TWA; 123 mg/m3 TW Netherlands: 20 ppm MAC; 100 mg/m3 MAC Russia: 10 mg/m3 TWA Spain: 20 ppm VLA-ED; 100 mg/m3 VLA-ED Personal Protective Equipment Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
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. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: colorless
Odor: Peculiar aromatic
pH: Not available.
Vapor Pressure: 0.330 kPa @20C
Viscosity: Not available.
Boiling Point: 163 - 166 deg C @ 760.00mm Hg
Freezing/Melting Point: -45 deg C
Autoignition Temperature: 550 deg C ( 1,022.00 deg F)
Flash Point: 44 deg C ( 111.20 deg F)
Explosion Limits, lower: 1.00 vol %
Explosion Limits, upper: 6.00 vol %
Decomposition Temperature:
Solubility in water: miscible with alcohol, benzene and ether
Specific Gravity/Density: .8640g/cm3
Molecular Formula: C9H12
Molecular Weight: 120.19

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Will not occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 108-67-8: OX6825000 LD50/LC50:
CAS# 108-67-8: Draize test, rabbit, eye: 500 mg/24H Mild; Draize test, rabbit, skin: 20 mg/24H Moderate; Inhalation, rat: LC50 = 24000 mg/m3/4H; Oral, mouse: LD50 = 7000 mg/kg; Oral, rat: LD50 = 5000 mg/kg.
Carcinogenicity:
1,3,5-trimethylbenzene - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Fish: Fathead Minnow: LC50 = 3.48 mg/L; 96 Hr; UnspecifiedFish: Goldfish: LC50 = 12.5-13.0 mg/L; 96 Hr; UnspecifiedFish: Goldfish: LC50 = 13.7 mg/L; 72 Hr; UnspecifiedWater flea Daphnia: EC50 = 50 mg/L; 72 Hr; Unspecified

Section 13 - DISPOSAL CONSIDERATIONS
  Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: 1,3,5-TRIMETHYLBENZENE
Hazard Class: 3
UN Number: 2325
Packing Group: III
IMO
Shipping Name: 1,3,5-TRIMETHYLBENZENE
Hazard Class: 3
UN Number: 2325
Packing Group: III
RID/ADR
Shipping Name: 1,3,5-TRIMETHYLBENZENE
Hazard Class: 3
UN Number: 2325
Packing group: III

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI F N
Risk Phrases:
R 10 Flammable.
R 37 Irritating to respiratory system.
R 51/53 Toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
Safety Phrases:
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 108-67-8: 2
Canada
CAS# 108-67-8 is listed on Canada's DSL List.
CAS# 108-67-8 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 108-67-8 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

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