Ethyl methyl ketone
2-Butanone
MEK
Methyl acetone
C4H8O / CH3COCH2CH3
Molecular mass: 72.1
ICSC # 0179
CAS # 78-93-3
RTECS # EL6475000
UN # 1193
EC # 606-002-00-3
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Highly flammable.
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NO open flames, NO sparks, and NO smoking.
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Powder, AFFF, foam, carbon dioxide.
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Explosion
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Vapour/air mixtures are explosive.
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Closed system, ventilation, explosion-proof electrical equipment and lighting.
Do NOT use compressed air for filling, discharging, or handling.
Use non-sparking handtools.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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•Inhalation
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Cough.
Dizziness.
Drowsiness.
Headache.
Nausea.
Vomiting.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
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Safety goggles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Unconsciousness.
(Furthersee Inhalation).
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking and spilled liquid in sealable containers as far as possible.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Do NOT wash away into sewer.
Personal protection: self-contained breathing apparatus.
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Fireproof.
Separated from
strong oxidants,
strong acids.
Cool.
Well closed.
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Note: 6
F symbol
Xi symbol
R: 11-36-66-67
S: 2-9-16
UN Hazard Class: 3
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The vapour is heavier than air
and may travel along the ground; distant ignition possible.
Chemical Dangers:
Reacts violently withstrong oxidants andinorganic acids
causing fire and explosion hazard.
Attacks some plastic.
Occupational Exposure Limits:
TLV: 200 ppm as TWA; 300 ppm as STEL; BEI issued; (ACGIH 2004).
MAK: 200 ppm, 600 mg/m3 H;
Peak limitation category: I(1); Pregnancy risk group: C;
(DFG 2004).
OSHA PEL: TWA 200 ppm (590 mg/m3)
NIOSH REL: TWA 200 ppm (590 mg/m3) ST 300 ppm (885 mg/m3)
NIOSH IDLH: 3000 ppm See: 78933
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
and
the respiratory tract
.
The substance may cause effects on the central nervous system.
Exposure far above the OEL may result in unconsciousness.
Effects of Long-Term or Repeated Exposure:
The liquid defats the skin.
Animal tests show that this substance possibly causes toxic effects upon human reproduction.
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Physical
Properties
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Boiling point: 80°C
Melting point: -86°C
Relative density (water = 1): 0.8
Solubility in water, g/100 ml at 20°C: 29
Vapour pressure, kPa at 20°C: 10.5
Relative vapour density (air = 1): 2.41
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.1
Flash point: -9°C (c.c.)
Auto-ignition temperature: 505°C
Explosive limits, vol% in air: 1.8-11.5
Octanol/water partition coefficient as log Pow: 0.29
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Environmental
Data
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N O T E S
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The odour warning when the exposure limit value is exceeded is insufficient.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-30S1193
NFPA Code: H1; F3; R0.
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ADDITIONAL INFORMATION
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ICSC: 0179
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METHYL ETHYL KETONE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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