METHYL VINYL KETONE 1495
November 2003
3-Buten-2-one
CAS No: 78-94-4
Methylene acetone
RTECS No: EM9800000
C4H6O
UN No: 1251
Molecular mass: 70.1
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Highly flammable. NO open flames, NO sparks, and Powder, alcohol-resistant foam,
FIRE
NO smoking. water spray, carbon dioxide.
Vapour/air mixtures are explosive. Closed system, ventilation, In case of fire: keep drums, etc.,
EXPLOSION
explosion-proof electrical equipment cool by spraying with water.
and lighting.
EXPOSURE STRICT HYGIENE!
Burning sensation. Cough. Sore Ventilation, local exhaust, or Fresh air, rest. Half-upright position.
Inhalation
throat. Shortness of breath. breathing protection. Artificial respiration may be needed.
Laboured breathing. Headache. Refer for medical attention.
Dizziness. Tremor. Symptoms may
be delayed (see Notes).
MAY BE ABSORBED! Redness. Protective gloves. Protective Remove contaminated clothes.
Skin
Pain. Skin burns. (Further see clothing. Rinse skin with plenty of water or
Inhalation). shower. Refer for medical attention.
Causes watering of the eyes. Face shield, or or eye protection in First rinse with plenty of water for
Eyes
Redness. Pain. Severe deep combination with breathing several minutes (remove contact
burns. protection. lenses if easily possible), then take
to a doctor.
Burning sensation. Abdominal Do not eat, drink, or smoke during Rinse mouth. Do NOT induce
Ingestion
pain. Shock or collapse. (Further work. Wash hands before eating. vomiting. Give plenty of water to
see Inhalation). drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Remove all ignition sources. Collect leaking and UN Hazard Class: 6.1
spilled liquid in sealable containers as far as UN Subsidiary Risks: 3 and 8
possible. Absorb remaining liquid in sand or inert UN Pack Group: I
absorbent and remove to safe place. Personal
protection: chemical protection suit including
self-contained breathing apparatus.
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S1251 Fireproof. Cool. Keep in the dark. Separated from strong reducing agents,
NFPA Code: H4; F3; R2 strong oxidants and strong bases. Store only if stabilized.
IPCS Prepared in the context of cooperation between the International
Programme on Chemical Safety and the European Commission 漏
International IPCS 2005
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
1495 METHYL VINYL KETONE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS TO YELLOW LIQUID, WITH PUNGENT The substance can be absorbed into the body by inhalation,
ODOUR. through the skin and by ingestion.
Physical dangers Inhalation risk
The vapour is heavier than air and may travel along the ground; A harmful contamination of the air can be reached very quickly
distant ignition possible. Vapours are uninhibited and may form on evaporation of this substance at 20/C.
polymers and block the vents.
Effects of short-term exposure
Chemical dangers Lachrymation. The substance is corrosive to the eyes and the
The substance polymerize under the influence of peroxides, skin. Corrosive on ingestion. The vapour is severely irritating to
heat, light and oxidants. Reacts with strong bases, strong the eyes and the respiratory tract. Inhalation of the substance
reducing agents and strong oxidants. may cause lung oedema (see Notes). The substance may
cause effects on the central nervous system.
Occupational exposure limits
Effects of long-term or repeated exposure
TLV: 0.2 ppm (Ceiling value); (skin); SEN; (ACGIH 2003).
MAK: IIb (not established but data is available); skin absorption Repeated or prolonged contact may cause skin sensitization.
(H); sensitization of skin (Sh); (DFG 2003).
PHYSICAL PROPERTIES
Boiling point: 81/C Relative density of the vapour/air-mixture at 20/C (air = 1): 1.1
Melting point: -7/C Flash point: -7/C c.c.
Relative density (water = 1): 0.86 Auto-ignition temperature: 491/C
Solubility in water: good Explosive limits, vol% in air: 2.1-15.6
Vapour pressure, kPa at 25/C: 11 Octanol/water partition coefficient as log Pow: 0.117 (estimated)
Relative vapour density (air = 1): 2.4
ENVIRONMENTAL DATA
NOTES
The occupational exposure limit value should not be exceeded during any part of the working exposure.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical
effort. Rest and medical observation is therefore essential.
An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert.
Do NOT take working clothes home.
Card has been partly updated in April 2005. See section Occupational Exposure Limits.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE
漏IPCS 2005
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