Product ID:METHYL ETHYL KETONE
MSDS Date:05/08/1999
FSC:6810
NIIN:00-281-2785
MSDS Number: BHCFW

Emergency Phone: 800-726-2015/800-424-9300 CHEMTREC

Info Phone: 713-870-6000

Cage: 4H542

Telephone: 409-539-6244

Cage: 0YFV5

METHYL ETHYL KETONE (2-BUTANONE) (MEK) (SARA 313) (CERCLA)

CAS: 78-93-3

RTECS: EL6475000

OSHA PEL 200 PPM

ACGIH TLV: 200 PPM/300STEL;9596

EPA Report Quantity: 5000 LBS

DOT Report Quantity: 5000 LBS

LD50 LC50 Mixture:ORAL LD50 (RAT) IS 2737 MG/KG
Routes of Entry: Inhalation:YES Skin:YES Ingestion:NO
Reports of Carcinogenicity:NTP:NO IARC:NO OSHA:NO
Health Hazards Acute and Chronic:EYE: SEVERELY IRRITATING. MAY INJURE
EYE TISSUE, WHICH MAY RESULT IN PERMANENT DAMAGE. SKIN: FREQUENT OR
PROLONGED CONTACT MAY IRRITATE & CAUSE DERMATITIS. LOW ORDER OF
TOXICITY. INHALATION: VAPOR CON CENTRATIONS ABOVE RECOMMENDED
EXPOSURE LEVELS ARE IRRITATING TO EYES & RESPIRATORY TRACT, MAY
CAUSE HEADACHES & DIZZINESS, ARE ANESTHETIC & MAY HAVE OTHER
CENTRAL NERVOUS SYSTEM EFFECTS. LOW ORDER OF TOXICITY. INGESTION:
LOW ORDER OF TOXICITY. SMALL AMOUNTS OF LIQUID ASPIRATED INTO THE
RESPIRATORY SYSTEM DURING INGESTION OR VOMITING MAY CAUSE
BRONCHIOPNEUMONIA OR PULMONARY EDEMA. CHRONIC-SEE TOXIC OLOGIAL
SECTION.
Explanation of Carcinogenicity:METHYL ETHYL KETONE IS NOT LISTED AS A
CARCINOGEN OR SUSPECTED CARCINOGEN.
Effects of Overexposure:EYES: IRRITATION. SKIN: IRRITATION, DERMATITIS.
INHALED: IRRITATION, HEADACHES, DIZZINESS, ANESTHETIC, OTHER CNS
EFFECTS.
Medical Cond Aggravated by Exposure:NO DATA PROVIDED BY MANUFACTURER.

First Aid:EYE CONTACT: IMMEDIATELY FLUSH EYES WITH LARGE AMOUNTS OF
WATER FOR AT LEAST 15 MINUTES. GET PROMPT MEDICAL ATTENTION. SKIN
CONTACT: IMMEDIATELY FLUSH WITH LARGE AMOUNTS OF WATER; USE SOAP IF
AVAILABL E. REMOVE CONTAMINATED CLOTHING, INCLUDING SHOES, AFTER
FLUSHING HAS BEGUN. INHALATION: USING PROPER RESPIRATORY
PROTECTION, IMMEDICATELY REMOVE THE AFFECTED VICTIM FROM EXPOSURE.
ADMINISTER ARTIFICIA L RESPIRATION IF BREATHING IS STOPPED. KEEP AT
REST. CALL FOR PROMPT MEDICAL ATTENTION. INGESTION: IF SWALLOWED,
DO NOT INDUCE VOMITING. KEEP AT REST. GET PROMPT MEDICAL ATTENTION.

Flash Point Method:TCC
Flash Point:=-3.7C, 25.F
Autoignition Temp:=460.C, 860.F
Lower Limits:1.8
Upper Limits:11.5
Extinguishing Media:DRY CHEMICAL, CARBON DIOXIDE, ALCOHOL FOAM. WATER
MAY BE INEFFECTIVE, BUT SHOULD BE USED TO COOL FIRE-EXPOSED
CONTAINERS
Fire Fighting Procedures:WEAR FULL PROTECTIVE CLOTHING AND NIOSH-
APPROVED SELF-CONTAINED BREATHING APPARATUS WITH FULL FACEPIECE
OPERATED IN THE POSITIVE PRESSURE MODE.
Unusual Fire/Explosion Hazard:CONTAINERS MAY BURST DUE TO HEAT OF FIRE.
SHUT OFF "FUEL" TO FIRE. IF A LEAK HAS NOT IGNITED, USE WATER SPRAY
TO DISPERSE THE VAPORS. COVER SPILLS WITH FOAM.

Spill Release Procedures:ELIMINATE SOURCES OF IGNITION. STOP LEAK IF
POSSIBLE TO DO WITHOUT HAZARD. KEEP PUBLIC AWAY AND ADVISE
AUTHORITIES. PREVENT LIQUID FROM ENTERING SEWERS, WATER COURSES OR
LOW AREAS. CONTAIN LIQUID WITH SAND OR EARTH. RECOVER WITH
EXPLOSION-PROOF PUMP OR WITH ABSORBENT. CONSULT EXPERT ON DISPOSAL
OF RECOVERED MATERIAL AND ENSURE CONFORMITY TO LOCAL DISPOSAL
REGULATIONS.
Neutralizing Agent:NONE SPECIFIED BY MANUFACTURER.

Handling and Storage Precautions:KEEP CONTAINER CLOSED. HANDLE AND OPEN
CONTAINERS WITH CARE. STORE IN A COOL, WELL VENTILATED PLACE AWAY
FROM INCOMPATIBLE MATERIALS. DO NOT HANDLE OR STORE NEAR OPEN
FLAME, HEAT OR OTHER SOURCES OF I GNITION. PROTECT MATERIAL FROM
DIRECT SUNLIGHT. USE PROPER BONDING/GROUNDING PROCEDURES.
Other Precautions:DO NOT PRESSURIZE, CUT, HEAT OR WELD CONTAINERS.
EMPTY PRODUCT CONTAINERS MAY CONTAIN PRODUCT RESIDUE. DO NOT REUSE
EMPTY CONTAINERS WITHOUT COMMERCIAL CLEANING OR RECONDITIONING.

Respiratory Protection:WHERE CONCENTRATIONS IN AIR MAY EXCEED THE
LIMITS GIVEN IN THIS SECTION (TWA = 200 PPM, STEL = 885 MG/M3) AND
ENGINEERING, WORK PRACTICE OR OTHER MEANS OF EXPOSURE REDUCTION ARE
NOT ADEQUATE, NIOSH/MS HA APPROVED RESPIRATORS MAY BE NECESSARY TO
PREVENT OVEREXPOSURE BY INHALATION.
Ventilation:MECHANICAL DILUTION VENTILATION IS RECOMMENDED WHENEVER
THIS PRODUCT IS USED IN A CONFINED SPACE, IS HEATED ABOVEE AMBIENT
TEMPERATURES OR IS AGITATED.
Protective Gloves:CHEMICAL RESISTENT GLOVES. DLA-HMIS: BUTYL RUBBER OR
PVA
Eye Protection:CHEMICAL GOGGLES AND/OR FACE SHIELD.
Other Protective Equipment:FOR OPEN SYSTEMS WHERE CONTACT IS LIKELY,
WEAR LONG SLEEVES, CHEMICAL RESISTENT GLOVES AND CHEMICAL GOGGLES.
Work Hygienic Practices:NO DATA PROVIDED BY MANUFACTURER. DLA-HMIS: USE
GOOD PERSONAL HYGIENE PRACTICES. LAUNDER CONTAMINATED CLOTHING
BEFORE WEARING.
Supplemental Safety and Health
VENTILATION: USE EXPLOSION-PROOF VENTILATION EQUIPMENT.

HCC:F2
Boiling Pt:=79.4C, 175.F
B.P. Text:175F-177F
Melt/Freeze Pt:<0.C, 32.F
Vapor Pres:83 @ 75 F
Vapor Density:>1
Spec Gravity:0.81 @ 68 F
Evaporation Rate & Reference:6.0 (N-BUTYL ACETATE = 1)
Solubility in Water:APPRECIABLE
Appearance and Odor:CLEAR COLORLESS LIQUID WITH CHARACTERISTIC ODOR.

Stability Indicator/Materials to Avoid:YES
CAUSTICS, AMINES, ALKANOLAMINES, ALDEHYDES, AMMONIA, STRONG OXIDIZING
AGENTS, AND CHLORINATED COMPOUNDS.
Stability Condition to Avoid:NOT APPLICABLE.
Hazardous Decomposition Products:NONE.

Waste Disposal Methods:CONSULT EXPERT ON DISPOSAL OF RECOVERED MATERIAL
AND ENSURE CONFORMITY TO LOCAL DISPOSAL REGULATIONS. DLA-HMIS:
EPA/RCRA WASTE NUMBERS D001 (IGNITABLE) AND U159 (METHYL ETHYL
KETONE) MAY APPLY TO UNUS ED/UNCONTAMINATED PRODUCT.

Toxicological Information:CHRONIC EFFECTS: THERE IS NO EVIDENCE THAT
EXPOSURE TO METHYL ETHYL KETONE (MEK) ALONE CAUSES PROGRESSIVE OR
IRREVERSIBLE NEUROTOXIC EFFECTS. HOWEVER, SIMULTANEOUS
OVER-EXPOSURE TO MEK AND N-HEXANE CA N POTENTIATE THE KNOWN
IRREVERSIBLE NEUROTOXIC EFFECTS OF N-HEXANE. THERE IS NO REPORTED
HUMAN EVIDENCE THAT THESE NEUROTOXIC EFFECTS OCCUR WHEN EXPOSURE TO
BOTH CHEMICALS IS MAINTAINED BELOW ESTABLIS HED OSHA AND ACGIH
LIMITS.

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.

Ecological:NO SPECIFIC ECOLOGICAL DATA ARE AVAILABLE FOR THIS PRODUCT.
PLEASE REFER TO SPILL SECTION FOR INFORMATION REGARDING ACCIDENTAL
RELEASES AND SARA/FEDERAL REGULATORY SECTION FOR REGULATORY
REPORTING INF ORMATION.

Transport Information:DOT SHIPPING DESCRIPTION: METHYL ETHYL KETONE, 3,
UN1193, II.

SARA Title III Information:ENVIRONMENTAL DATA: UNDER PROVISIONS OF
TITLE III, SECTIONS 311/312 OF SARA PRODUCT IS CLASSIFIED INTO
FOLLOWING HAZARD CATEGORIES: IMMEDIATE AND DELAYED HEALTH, FIRE.
THIS INFORMATION MAY BE SUBJECT TO THE PROVISIONS OF THE COMMUNITY
RIGHT TO KNOW REPORTING REQUIREMENTS IF THRESHOLD CRITERIA ARE MET.
THIS PRODUCT CONTAINS THE FOLLOWING SECTION 313 REPORTABLE
INGREDINETS: METHYL ETHYL KETONE, CAS # 78-93-3, 100%.
Federal Regulatory Information:CERCLA-IF MORE THAN REPORTABLE QUANTITY
SPILLED, INCIDENT IS SUBJECT TO PROVISIONS OF CERCLA, CALL NATIONAL
RESPONSE CENTER AT 800-424-8802, RQ=5000 POUNDS; TSCA-THIS PRODUCT
IS LISTED ON THE TSCA INV ENTORY AT CAS REGISTRY NUMBER 78-93-3.
State Regulatory Information:NO DATA PROVIDED BY MANUFACTURER.