**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****
+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 141-79-7 |Mesityl oxide | 100.0 | 205-502-5 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: XN
Risk Phrases: 10 20/21/22
**** SECTION 3 - HAZARDS IDENTIFICATION ****
EMERGENCY OVERVIEW
Flammable. Harmful by inhalation, in contact with skin and if
swallowed.Lachrymator (substance which increases the flow of tears).
Potential Health Effects
Eye:
Causes severe eye irritation. Vapors may cause eye irritation.
May cause corneal opacity in addition to corneal scarring and
necrosis. May cause chemical conjunctivitis and corneal damage.
Skin:
May cause severe skin irritation. Prolonged and/or repeated contact
may cause irritation and/or dermatitis. Substance is rapidly
absorbed through the skin. May cause irritation and dermatitis. May
cause cyanosis of the extremities.
Ingestion:
May cause irritation of the digestive tract. May cause
gastrointestinal irritation with nausea, vomiting and diarrhea. May
cause liver and kidney damage. May cause central nervous system
depression, characterized by excitement, followed by headache,
dizziness, drowsiness, and nausea. Advanced stages may cause
collapse, unconsciousness, coma and possible death due to
respiratory failure. May be harmful if swallowed. Ingestion of large
amounts may cause CNS depression.
Inhalation:
Causes respiratory tract irritation. May cause liver and kidney
damage. May cause lung damage. Causes narcotic effects including
headache, dizziness, weakness, unconsciousness, and possible death.
Aspiration may lead to pulmonary edema. Vapors may cause dizziness or
suffocation. May cause burning sensation in the chest.
Chronic:
Prolonged or repeated inhalation may cause lung damage and/or
central nervous system disturbances. Prolonged or repeated skin
contact may cause dermatitis. May cause liver and kidney damage.
**** SECTION 4 - FIRST AID MEASURES ****
Eyes:
Immediately flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid
immediately.
Skin:
Get medical aid immediately. Immediately flush skin with plenty of
water for at least 15 minutes while removing contaminated clothing
and shoes.
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 immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh
air immediately. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen.
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 can travel to a source of ignition and flash
back. During a fire, irritating and highly toxic gases may be
generated by thermal decomposition or combustion. Will burn if
involved in a fire. Use water spray to keep fire-exposed containers
cool. Water may be ineffective. Material is lighter than water and a
fire may be spread by the use of water. 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. Vapors may form an explosive mixture with air.
Extinguishing Media:
For small fires, use water spray, dry chemical, carbon dioxide or
chemical foam. Use water spray to cool fire-exposed containers.
Water may be ineffective. For large fires, use water spray, fog or
alcohol-resistant foam. Do NOT use straight streams of water. Cool
containers with flooding quantities of water until well after fire
is out.
**** 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. Isolate area and deny entry. 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. Keep from contact
with oxidizing materials. Store in a cool, dry, well-ventilated area
away from incompatible substances. Flammables-area.
**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****
Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne
concentrations below the permissible exposure limits.
Exposure Limits
CAS# 141-79-7:
United States OSHA: 25 ppm TWA; 100 mg/m3 TWA
Belgium - TWA: 15 ppm VLE; 61 mg/m3 VLE
Belgium - STEL: 25 ppm VLE; 101 mg/m3 VLE
France - VME: 15 ppm VME; 60 mg/m3 VME
Germany: 25 ppm TWA; 100 mg/m3 TWA
Germany: Skin absorber
Malaysia: 15 ppm TWA; 60 mg/m3 TWA
Netherlands: 15 ppm MAC; 60 mg/m3 MAC
Russia: 1 mg/m3 TWA
Spain: 15 ppm VLA-ED; 61 mg/m3 VLA-ED
Spain: 25 ppm VLA-EC; 102 mg/m3 VLA-EC
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. 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: oily, colorless to light yellow
Odor: peppermint or honey-like
pH: Not available.
Vapor Pressure: 10 mm Hg @ 26C
Viscosity: Not available.
Boiling Point: 130 deg C
Freezing/Melting Point: -59 deg C
Autoignition Temperature: 652 deg F ( 344.44 deg C)
Flash Point: 87 deg F ( 30.56 deg C)
Explosion Limits, lower: 1.4%
Explosion Limits, upper: 7.2%
Decomposition Temperature:
Solubility in water: Slightly soluble in water.
Specific Gravity/Density: 0.8539
Molecular Formula: C6H10O
Molecular Weight: 98.0694
**** 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:
2-aminoethanol, strong oxidizing agents, chlorosulfonic acid,
ethylene diamine, nitric acid, oleum, sulfuric acid.
Hazardous Decomposition Products:
Carbon monoxide, irritating and toxic fumes and gases, carbon
dioxide.
Hazardous Polymerization: Has not been reported.
**** SECTION 11 - TOXICOLOGICAL INFORMATION ****
RTECS#:
CAS# 141-79-7: SB4200000
LD50/LC50:
CAS# 141-79-7: Draize test, rabbit, eye: 20 mg Severe; Inhalation,
mouse: LC50 = 10 gm/m3/2H; Inhalation, rat: LC50 = 9 gm/m3/4H; Oral,
mouse: LD50 = 710 mg/kg; Oral, rabbit: LD50 = 1 gm/kg; Oral, rat:
LD50 = 1120 mg/kg; Skin, rabbit: LD50 = 5150 mg/kg.
TCLo (Inhalation, Human) = 25 ppm
ppm/8H; Kidney, Ureter, Bladder - other changes; Related to Chronic
Data -
Carcinogenicity:
Mesityl oxide -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
**** SECTION 12 - ECOLOGICAL INFORMATION ****
Ecotoxicity:
Fish: Goldfish: LC50 = 540 mg/L; 24 Hr.; Modified ASTM D1345
**** 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: MESITYL OXIDE
Hazard Class: 3
UN Number: 1229
Packing Group: III
IMO
Shipping Name: MESITYL OXIDE
Hazard Class: 3
UN Number: 1229
Packing Group: III
RID/ADR
Shipping Name: MESITYL OXIDE
Hazard Class: 3
UN Number: 1229
Packing group: III
**** SECTION 15 - REGULATORY INFORMATION ****
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 10 Flammable.
R 20/21/22 Harmful by inhalation, in contact with
skin and if swallowed.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 25 Avoid contact with eyes.
S 33 Take precautionary measures against static
discharges.
WGK (Water Danger/Protection)
CAS# 141-79-7: 1
Canada
CAS# 141-79-7 is listed on Canada's DSL List.
CAS# 141-79-7 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 141-79-7 is listed on the TSCA inventory.
**** SECTION 16 - ADDITIONAL INFORMATION ****
MSDS Creation Date: 6/24/1999 Revision #2 Date: 3/18/2003
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 we assume 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 way shall the company 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 the company has been advised of
the possibility of such damages.
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