=====================  Product Identification  =====================

MSDS NAME:MESITYL OXIDE,98%
NIIN:00N010925
MSDS Number: BHVKR
=== Responsible Party ===
Company:ALDRICH CHEMICAL CO
Box:355
City:MILWAUKEE
State:WI
ZIP:53201
Info Phone Num:414-273-3850
Emergency Phone Num:414-273-3850
CAGE:60928
=== Contractor Identification ===
Company:ALDRICH CHEMICAL CO INC
Address:1001 WEST ST PAUL AVE
Box:355
City:MILWAUKEE
State:WI
ZIP:53233
Country:US
Phone:414-273-3850
CAGE:60928

=============  Composition/Information on Ingredients  =============

Name:MESITYL OXIDE
CAS:141-79-7
RTECS #:SB4200000
Fraction by Wt: 98%
Other REC Limits:N/K 
OSHA PEL:25 PPM
ACGIH TLV:15 PPM/25 STEL; 9293

=====================  Hazards Identification  =====================

LD50 LC50 Mixture:N/K 
Routes of Entry: Inhalation:YES  Skin:YES  Ingestion:YES
Reports of Carcinogenicity:NTP:NO    IARC:NO	OSHA:NO
Health Hazards Acute and Chronic:HARMFUL IF SWALLOWED,INHALED OR
    ABSORBED THROUGH SKIN.HIGH CONCENTRATIONS ARE EXTREMELY DESTRUCTIVE
    TO TISSUES OF THE MUCOUS MEMBRANES & UPPER RESPIRATORY TRACT,EYES &
    SKIN.
Explanation of Carcinogenicity:NONE
Effects of Overexposure:EYES:CAUSES SEVERE IRRIT.HIGH CONC EXTREMELY
    DESTRUCTIVE.SKIN:HARMFUL IF ABSORBED.CAUSES SEVERE IRRIT.HIGH CONC
    EXTREMELY DESTRUCTIVE.INGEST:HARMFUL.INHAL:HIGH CONC EXTREMELY
    DESTRUCTIVE TO MUC MEMB,U PPER RESP TRACT.SYMP INCLUDE BURNING
    SENSATION,COUGHING,WHEEZING,LARYNGITIS,SHORTNESS OF
    BREATH,HEADACHE,NAUSEA,VOMIT.
Medical Cond Aggravated by Exposure:N/K 

=======================  First Aid Measures  =======================

Eyes:IMMED FLUSH W/ COPIOUS AMTS OF WATER FOR AT LEAST 15
    MIN,SEPARATE LIDS W/ FINGERS.CALL MD.SKIN:IMMED FLUSH W/ COPIOUS
    AMTS OF WATER FOR AT LEAST 15 MIN WHILE REMOVING CONTAM CLOTHING &
    SHOES.CALL	MD.INGEST:CONTACT MD IMMED .INHAL:REMOVE TO FRESH
    AIR.IF NOT BREATHING GIVE ARTIFICIAL RESPIRATION.IF BREATHING IS
    DIFFICULT GIVE OXYGEN.CALL MD.

=====================  Fire Fighting Measures  =====================

Flash Point:87F,30.56C
Lower Limits:N/K 
Upper Limits:N/K 
Extinguishing Media:CARBON DIOXIDE,DRY CHEMICAL POWDER,ALCOHOL OR
    POLYMER FOAM.WATER MAY BE EFFECTIVE FOR COOLING,BUT MAY NOT AFFECT
    FIRE.
Fire Fighting Procedures:USE NIOSH/MSHA APPROVED SCBA AND FULL
    PROTECTIVE EQUIPMENT .PREVENT CONTACT WITH SKIN & EYES.FLAMMABLE
    LIQUID.
Unusual Fire/Explosion Hazard:VAPOR MAY TRAVEL CONSIDERABLE DISTANCE TO
    SOURCE OF IGNITION & FLASH BACK.HAZARDOUS DECOMPOSITION
    PRODUCTS:TOXIC FUMES OF CARBON MONOXIDE,CARBON DIOXIDE.

==================  Accidental Release Measures  ==================

Spill Release Procedures:EVACUATE AREA.WEAR SCBA,RUBBER BOOTS & HEAVY
    RUBBER GLOVES.SHUT OFF ALL SOURCES OF IGNITION.COVER W/ AN
    ACTIVATED CARBON ABSORBENT,TAKE UP & PLACE IN CLOSED
    CONTAINERS.TRANSPORT OUTDOORS.VENTILATE ARE A & WASH SPILL SITE
    AFTER MATL PICKUP IS COMPLETE.
Neutralizing Agent:N/K 

======================	Handling and Storage  ======================

Handling and Storage Precautions:WEAR RESP,CHEM-RESIST GLOVES,SAFETY
    GOGGLES,OTHER PROT CLTHG.USE ONLY IN CHEM FUME HOOD.SAFETY
    SHOWER,EYE BATH.DO NOT BREATHE VAPOR.FACESHLD (8" MIN).
Other Precautions:STORE IN A COOL,DRY PLACE.AVOID CONTACT W/
    EYES,SKIN,CLOTHING.AVOID PROLONGED OR REPEATED EXPOSURE.WASH
    THOROUGHLY AFTER HANDLING.SEVERE IRRIT.LACHRYMATOR.KEEP TIGHTLY
    CLOSED.KEEP FROM HEAT,SPARKS,OPE N FLAME.READILY ABSORBED THROUGH
    SKIN.

=============  Exposure Controls/Personal Protection  =============

Respiratory Protection:NIOSH/MSHA APPROVED RESPIRATOR APPROPRIATE FOR
    EXPOSURE OF CONCERN .
Ventilation:LOCAL AND GENERAL VENTILATION NECESSARY TO KEEP AIR
    CONCENTRATION BELOW TLV .USE ONLY IN CHEMICAL FUME HOOD.
Protective Gloves:CHEMICAL-RESISTANT
Eye Protection:CHEM WORK GOGG .FACESHLD (8" MIN).
Other Protective Equipment:RUBBER BOOTS & HEAVY RUBBER GLOVES.SAFETY
    SHOWER & EYE BATH.
Work Hygienic Practices:WASH THOROUGHLY AFTER HANDLING.REMOVE & WASH
    CONTAMINATED CLOTHING BEFORE REUSE.
Supplemental Safety and Health
ROUTES OF ENTRY:INHAL/SKIN/INGEST .

==================  Physical/Chemical Properties  ==================

Boiling Pt:B.P. Text:129C,264.2F
Melt/Freeze Pt:M.P/F.P Text:-53C,-63.4F
Decomp Temp:Decomp Text:N/K 
Vapor Pres:N/K 
Vapor Density:N/K 
Spec Gravity:0.858 (WATER=1)
Evaporation Rate & Reference:N/K 
Solubility in Water:N/K 
Appearance and Odor:COLORLESS LIQUID

=================  Stability and Reactivity Data  =================

AVOID CONTACT WITH ACID,BASES,OXIDIZING AGENTS,REDUCING
    AGENTS,HALOGENS.
Stability Condition to Avoid:N/K 
Hazardous Decomposition Products:TOXIC FUMES OF CARBON MONOXIDE &
    CARBON DIOXIDE.

====================  Disposal Considerations  ====================

Waste Disposal Methods:DISPOSAL MUST BE IN ACCORDANCE WITH
    FEDERAL,STATE & LOCAL REGULATIONS .BURN IN A CHEMICAL INCINERATOR
    EQUIPPED W/ AN AFTERBURNER & SCRUBBER BUT EXERT EXTRA CARE IN
    IGNITING AS THIS MATERIAL IS H IGHLY FLAMMABLE.

 Disclaimer (provided with this information by the compiling agencies):
 This information is formulated for use by elements of the Department
 of Defense.  The United States of America in no manner whatsoever,
 expressly or implied, warrants this information to be accurate and
 disclaims all liability for its use.  Any person utilizing this
 document should seek competent professional advice to verify and
 assume responsibility for the suitability of this information to their
 particular situation.

*** END OF RECORD ***