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ISOPENTANE ICSC: 1153
Date of Peer Review: April 1994

Ethyl dimethyl methane
2-Methylbutane
Isoamyl hydride
CAS # 78-78-4 C5H12 / (CH3)2-CH-CH2-CH3
RTECS # EK4430000 Molecular mass: 72.2
UN # 1265
EC # 601-006-00-1
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Extremely flammable.
NO open flames, NO sparks, and NO smoking.
Powder, AFFF, foam, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Do NOT use compressed air for filling, discharging, or handling.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE


Inhalation Cough. Dizziness. Drowsiness. Headache. Shortness of breath. Sore throat. Irregular heartbeat.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
Skin Dry skin. Redness.
Protective gloves.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
Eyes Redness. Pain.
Safety spectacles 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 Abdominal pain. Nausea. Vomiting. (Further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! 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: filter respirator for organic gases and vapours.
EU Classification
Symbol: F, Xn, N
R: 12-51/53-65-66-67
S: (2-)-9-16-29-33-61-62
UN Classification
UN Hazard Class: 3
UN Pack Group: I
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30S1265 or 30GF1-I+II
NFPA Code: H 1; F 4; R 0;
Fireproof. Well closed.
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


ISOPENTANE ICSC: 1153
IMPORTANT DATA
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. As a result of flow, agitation, etc., electrostatic charges can be generated.

CHEMICAL DANGERS:
May explode on heating.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 600 ppm as TWA; (ACGIH 2004).
MAK: 1000 ppm, 3000 mg/m; Peak limitation category: II(2); Pregnancy risk group: D; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.

INHALATION RISK:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. Swallowing the liquid may cause aspiration into the lungs with the risk of chemical pneumonitis. The substance may cause effects on the central nervous system and heart, resulting in impaired functions.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The liquid defats the skin.
PHYSICAL PROPERTIES
Boiling point: 28C
Melting point: -160C
Relative density (water = 1): 0.6
Solubility in water: none
Vapour pressure, kPa at 20C: 79
Relative vapour density (air = 1): 2.5
Relative density of the vapour/air-mixture at 20C (air = 1): 2.2
Flash point: <-51C c.c.
Auto-ignition temperature: 420C
Explosive limits, vol% in air: 1.4-7.6
Octanol/water partition coefficient as log Pow: 2.3
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
Use of alcoholic beverages enhances the harmful effect. High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death. Check oxygen content before entering area. The relation between odour and the occupational exposure limit cannot be indicated.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
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