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MSDS 
:
 1,2,3-Trimethylbenzene, Tech., 90%
CAS 
:
 526-73-8
SYNONYMS 
:
 Hemimellitene
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
|----------------|--------------------------------------|----------|-----------|
| 526-73-8 |1,2,3-TRIMETHYLBENZENE | 90% | 208-394-8 |
|----------------|--------------------------------------|----------|-----------|
| 7732-18-5 |Water | Balance | 231-791-2 |
+----------------+--------------------------------------+----------+-----------+
Text for R-phrases: see Section 16
Hazard Symbols: XI
Risk Phrases: 10 36/37/38

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Flammable. Irritating to eyes, respiratory system and skin.The
toxicological properties of this material have not been fully
investigated.

Potential Health Effects
Eye:
Causes eye irritation. Causes redness and pain.
Skin:
Causes skin irritation. Prolonged and/or repeated contact may cause
irritation and/or dermatitis. Causes redness and pain.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. The toxicological properties of this substance have not
been fully investigated. Aspiration of material into the lungs may
cause chemical pneumonitis, which may be fatal. May cause central
nervous system depression.
Inhalation:
Causes respiratory tract irritation. The toxicological properties of
this substance have not been fully investigated. May cause
drowsiness, unconsciousness, and central nervous system depression.
Vapors may cause dizziness or suffocation.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. May cause
anemia and other blood cell abnormalities. Prolonged exposure may
produce a narcotic effect. Prolonged or repeated exposure may cause
nausea, dizziness, and headache.

**** 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.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15
minutes while removing contaminated clothing and shoes. Wash clothing
before reuse.
Ingestion:
Do not induce vomiting. Never give anything by mouth to an
unconscious person. Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately. If breathing
is difficult, give oxygen. Get medical aid. Do NOT use mouth-to-mouth
resuscitation. If breathing has ceased apply artificial respiration
using oxygen and a suitable mechanical device such as a bag and a
mask. Possible aspiration hazard.
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. Vapors may form an explosive mixture with air.
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. 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. Avoid runoff into storm sewers and
ditches which lead to waterways. Clean up spills immediately,
observing precautions in the Protective Equipment section. 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 with adequate ventilation.
Follow all MSDS and label precautions even after container is emptied
because they may contain product residues. 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. Take precautionary measures against static discharges.
Keep container tightly closed. Keep away from heat, sparks and
flame. Avoid ingestion and inhalation. Wash clothing before reuse. 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:
Facilities storing or utilizing this material should be equipped
with an eyewash facility and a safety shower. Use adequate
ventilation to keep airborne concentrations low.
Exposure Limits
CAS# 526-73-8:
United Kingdom, WEL - TWA: (listed as trimethyl benzene): 25 ppm
125 mg/m3 TWA
United Kingdom, WEL - STEL: (listed as trimethyl benzene): 75 ppm
STEL; 375 mg/m3 STEL

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
Spain: 20 ppm VLA-ED; 100 mg/m3 VLA-ED
CAS# 7732-18-5:


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:
A respiratory protection program that meets OSHA's 29
CFR 1910.134 and ANSI Z88.2 requirements or European
Standard EN 149 must be followed whenever workplace
conditions warrant respirator use.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Liquid
Color: colorless
Odor: benzene-like
pH: Not available.
Vapor Pressure: 1.8 mbar @ 20 deg C
Viscosity: Not available.
Boiling Point: 175 - 176 deg C @ 760.00mm Hg
Freezing/Melting Point: -25 deg C
Autoignition Temperature: 470 deg C ( 878.00 deg F)
Flash Point: 48 deg C ( 118.40 deg F)
Explosion Limits, lower: 0.88%
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: soluble in alcohol
Specific Gravity/Density: .8940g/cm3
Molecular Formula: C9H12
Molecular Weight: 120.19

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable at room temperature in closed containers under normal storage
and handling conditions.
Conditions to Avoid:
Incompatible materials, ignition sources, excess heat.
Incompatibilities with Other Materials:
Oxidizing agents.
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# 526-73-8: DC3300000
CAS# 7732-18-5: ZC0110000
LD50/LC50:
Not available.
CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.
Carcinogenicity:
1,2,3-TRIMETHYLBENZENE -
Not listed by ACGIH, IARC, or NTP.
Water -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****



**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Shipping Name: FLAMMABLE LIQUID, N.O.S.*
Hazard Class: 3
UN Number: 1993
Packing Group: III
IMO
Shipping Name: FLAMMABLE LIQUID, N.O.S.
Hazard Class: 3.3
UN Number: 1993
Packing Group: III
RID/ADR
Shipping Name: FLAMMABLE LIQUID, N.O.S.
Hazard Class: 3
UN Number: 1993
Packing group: III

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI
Risk Phrases:
R 10 Flammable.
R 36/37/38 Irritating to eyes, respiratory system
and skin.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 28A After contact with skin, wash immediately with
plenty of water.
S 33 Take precautionary measures against static
discharges.
S 37 Wear suitable gloves.
S 37/39 Wear suitable gloves and eye/face
protection.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 526-73-8: No information available.
CAS# 7732-18-5: No information available.
Canada
CAS# 526-73-8 is listed on Canada's DSL List.
CAS# 7732-18-5 is listed on Canada's DSL List.
CAS# 526-73-8 is listed on Canada's Ingredient Disclosure List.
CAS# 7732-18-5 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 526-73-8 is listed on the TSCA inventory.
CAS# 7732-18-5 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

Text for R-phrases from Section 2
MSDS Creation Date: 4/14/1999 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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