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METHYL VINYL KETONE ICSC: 1495
Date of Peer Review: November 2003

3-Buten-2-one
Methylene acetone
CAS # 78-94-4 C4H6O
RTECS # EM9800000 Molecular mass: 70.1
UN # 1251
EC #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Highly flammable.
NO open flames, NO sparks, and NO smoking.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE!

Inhalation Burning sensation. Cough. Sore throat. Shortness of breath. Laboured breathing. Headache. Dizziness. Tremor. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin MAY BE ABSORBED! Redness. Pain. Skin burns. (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Causes watering of the eyes. Redness. Pain. Severe deep burns.
Face shield, or or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Burning sensation. Abdominal pain. Shock or collapse. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Remove all ignition sources. 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. Personal protection: chemical protection suit including self-contained breathing apparatus.
EU Classification
UN Classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Pack Group: I
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S1251
NFPA Code: H4; F3; R2;
Fireproof. Cool. Keep in the dark. Separated from strong reducing agents, strong oxidants and strong bases. Store only if stabilized.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

SEE IMPORTANT INFORMATION ON BACK


METHYL VINYL KETONE ICSC: 1495
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW LIQUID, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible. Vapours are uninhibited and may form polymers and block the vents.

CHEMICAL DANGERS:
The substance polymerize under the influence of peroxides, heat, light and oxidants. Reacts with strong bases, strong reducing agents and strong oxidants.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.2 ppm (Ceiling value); (skin); SEN; (ACGIH 2003).
MAK: IIb (not established but data is available); skin absorption (H); sensitization of skin (Sh); (DFG 2003).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
Lachrymation. The substance is corrosive to the eyes and the skin. Corrosive on ingestion. The vapour is severely irritating to the eyes and the respiratory tract. Inhalation of the substance may cause lung oedema (see Notes). The substance may cause effects on the central nervous system.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization.
PHYSICAL PROPERTIES
Boiling point: 81C
Melting point: -7C
Relative density (water = 1): 0.86
Solubility in water: good
Vapour pressure, kPa at 25C: 11
Relative vapour density (air = 1): 2.4
Relative density of the vapour/air-mixture at 20C (air = 1): 1.1
Flash point: -7C c.c.
Auto-ignition temperature: 491C
Explosive limits, vol% in air: 2.1-15.6
Octanol/water partition coefficient as log Pow: 0.117 (estimated)
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


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2004
See Also:
        Methyl vinyl ketone (CHEMINFO)