International Chemical Safety Cards

METHYL VINYL KETONE

ICSC: 1495

3-Buten-2-one
Methylene acetone
C₄H₆O
Molecular mass: 70.1

ICSC #    1495
CAS #     78-94-4
RTECS # EM9800000
UN #        1251
November 27, 2003 Peer reviewed

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

STORAGE

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.

Fireproof. Cool. Keep in the dark. Separated from strong reducing agents , strong oxidants and strong bases. Store only if stabilized.

R:
S:
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Packing Group: I

SEE IMPORTANT INFORMATION ON BACK

ICSC: 1495

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards

METHYL VINYL KETONE

ICSC: 1495

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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: llb, see Notes;
H; 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 20°C.

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: 81°C
Melting point: -7°C
Relative density (water = 1): 0.86
Solubility in water:
good
Vapour pressure, kPa at 25°C: 11
Relative vapour density (air = 1): 2.4

Relative density of the vapour/air-mixture at 20°C (air = 1): 1.1
Flash point:
-7°C c.c.
Auto-ignition temperature: 491°C
Explosive limits, vol% in air: 2.1-15.6
Octanol/water partition coefficient as log Pow: 0.117 (estimated)

ENVIRONMENTAL
DATA

N O T E S

MAK value not established but full documentation is available (MAK IIb). 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.

Transport Emergency Card: TEC (R)-61S1251

NFPA Code: H4; F3; R2;

ADDITIONAL INFORMATION

ICSC: 1495	METHYL VINYL KETONE
(C) IPCS, CEC, 1994

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.