IPCS INCHEM Home
n-PENTANE
ICSC: 0534
Peer-Review Status: 11.04.2014 Validated
Amyl hydride
CAS #: 109-66-0 RTECS #: RZ9450000
UN #: 1265
EC #: 601-006-00-1
EINECS #: 203-692-4
    Formula: C5H12 / CH3(CH2)3CH3
Molecular mass: 72.2

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Highly flammable. Heating will cause rise in pressure with risk of bursting.  NO open flames, NO sparks and NO smoking. NO contact with strong oxidizing agents.  Use powder, carbon dioxide, alcohol-resistant foam, water spray. 
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. Use non-sparking handtools.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
Inhalation Dizziness. Drowsiness. Headache. Nausea. Unconsciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Dry skin.  Protective gloves.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. 
Eyes   Wear safety spectacles or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion Nausea. Vomiting. Aspiration hazard!  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: filter respirator for organic gases and vapours of low boiling point adapted to the airborne concentration of the substance. Remove all ignition sources. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in dry sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.   
EC Classification
Symbol: F+, Xn, N; R: 12-65-66-67-51/53; S: (2)-9-16-29-33-61-62; Note: C 
UN Classification
UN Hazard Class: 3; UN Pack Group: I 
GHS Classification
Signal: Danger
Highly flammable liquid and vapour
May cause drowsiness or dizziness
May be fatal if swallowed and enters airways
Toxic to aquatic life 
flam;flameexcl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F4; R0.  Fireproof. Separated from strong oxidants. Cool. Well closed. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

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. The vapour is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen. 

Chemical dangers
May explode on heating. Reacts with strong oxidants such as peroxides; nitrates and perchlorates. This generates fire and explosion hazard. Attacks some forms of plastic, rubber and coatings. 

Occupational exposure limits
TLV: 600ppm as TWA; (ACGIH 2014).
EU OEL: 1000ppm, 3000mg/m³ as TWA;. 

Routes of exposure
 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
If swallowed the substance easily enters the airways and could result in aspiration pneumonitis. Inhalation of high concentrations of the vapour may cause depression of the central nervous system. 

Effects of long-term or repeated exposure
The substance defats the skin, which may cause dryness or cracking. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 36°C
Melting point: -129°C
Relative density (water = 1): 0.63
Solubility in water, g/100ml at 20°C: 0.004 (very poor)
Vapour pressure, kPa at 18.5°C: 53.3
Relative vapour density (air = 1): 2.5
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.8
Flash point: -49°C c.c.
Auto-ignition temperature: 260°C
Explosive limits, vol% in air: 1.5-7.8
Octanol/water partition coefficient as log Pow: 3.39
Viscosity: 0,36 mm²/s 
The substance is toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised not to let the chemical enter into the environment. 

NOTES
High concentrations in the air cause a deficiency of oxygen with the risk of unconsciousness or death.
Check oxygen content before entering the area. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations