International Chemical Safety Cards

cis-2-BUTENE

ICSC: 0397

2-Butene, (Z)-
cis-Dimethylethylene
beta-cis-Butylene
C₄H₈ / CH₃HC=CHCH₃
Molecular mass: 56.1
(cylinder)

ICSC #    0397
CAS #     590-18-1
RTECS #
UN #        1012
EC #         601-012-00-4
March 26, 1996 Peer reviewe

TYPES OF HAZARD/ EXPOSURE	ACUTE HAZARDS/ SYMPTOMS	PREVENTION	FIRST AID/ FIRE FIGHTING
FIRE	Extremely flammable.	NO open flames, NO sparks, and NO smoking.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with water spray.
EXPLOSION	Gas/air mixtures are explosive.	Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Use non-sparking handtools. Flame arrester to prevent flash-back from burner to cylinder.	In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

EXPOSURE
•INHALATION	Dizziness. Unconsciousness.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Refer for medical attention.
•SKIN	ON CONTACT WITH LIQUID: FROSTBITE.	Cold-insulating gloves.	ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
•EYES	See Skin.	Face shield.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION		Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Ventilation. NEVER direct water jet on liquid. Personal protection: chemical protection suit including self-contained breathing apparatus.

Fireproof. Store outside or in a separate well-ventilated building. Cool.

Note: C
F+ symbol
R: 12
S: 2-9-16-33
UN Hazard Class: 2.1

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0397

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

cis-2-BUTENE

ICSC: 0397

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A

PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS.

PHYSICAL DANGERS:
The gas is heavier than air and may travel along the ground; distant ignition possible, and may accumulate in low ceiling spaces causing deficiency of oxygen. As a result of flow, agitation, etc., electrostatic charges can be generated.

CHEMICAL DANGERS:

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas.

EFFECTS OF SHORT-TERM EXPOSURE:
Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the central nervous system. Exposure may result in unconsciousness.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 4°C
Melting point: -139°C
Relative density (water = 1): 0.6
Solubility in water:
none
Vapour pressure, kPa at 21°C: 188

Relative vapour density (air = 1): 1.9
Flash point: Flammable gas
Auto-ignition temperature: 324°C
Explosive limits, vol% in air: 1.7-9.0
Octanol/water partition coefficient as log Pow: 2.33

ENVIRONMENTAL
DATA

N O T E S

High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. The recommendations on this Card also apply to trans-2-butene (ICSC 0398).

Transport Emergency Card: TEC (R)-500

NFPA Code: H1; F4; R0;

ADDITIONAL INFORMATION

ICSC: 0397	cis-2-BUTENE
(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.