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CYCLOPENTANE
ICSC: 0353
Peer-Review Status: 09.06.2011 Validated
Pentamethylene 
CAS #: 287-92-3 RTECS #: GY2390000
UN #: 1146
EC #: 601-030-00-2
EINECS #: 206-016-6
    Formula: C5H10
Molecular mass: 70.1

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.  Use foam, carbon dioxide, powder. Water may be ineffective. 
EXPLOSION Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Use non-sparking handtools. 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   PREVENT GENERATION OF MISTS!   
Inhalation Cough. Nausea. Headache. Dizziness. Incoordination. Drowsiness. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness.  Wear safety goggles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Sore throat. Abdominal pain. Diarrhoea. Nausea. Vomiting. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  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 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. Do NOT wash away into sewer. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Do NOT absorb in saw-dust or other combustible absorbents. Then store and dispose of according to local regulations.   
EC Classification
Symbol: F; R: 11-52/53; S: (2)-9-16-29-33-61 
UN Classification
UN Hazard Class: 3; UN Pack Group: II 
GHS Classification
Signal: Danger
Highly flammable liquid and vapour
Causes eye irritation
May cause respiratory irritation
May cause drowsiness or dizziness
May be harmful if swallowed and enters airways
Toxic to aquatic life 
flam;flameexcl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F3; R0.  Fireproof. Well closed. Separated from strong oxidants and food and feedstuffs. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH MILD 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
Reacts with strong oxidants. 

Occupational exposure limits
TLV: 600ppm as TWA; (ACGIH 2010). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour. 

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
The substance and the vapour in high concentrations are irritating to the eyes and respiratory tract. The substance is irritating to the gastrointestinal tract. If swallowed the substance easily enters the airways and could result in aspiration pneumonitis. The substance may cause effects on the central nervous system. This may result in lowering of consciousness. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dryness and cracking and dermatitis. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 49°C
Melting point: -94°C
Relative density (water = 1): 0.8 at 20°C
Solubility in water: none
Vapour pressure, kPa at 20°C: 45
Relative vapour density (air = 1): 2.4
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.6
Flash point: -37°C c.c.
Auto-ignition temperature: 320°C
Explosive limits, vol% in air: 1.1-8.7
Octanol/water partition coefficient as log Pow: 3.0
Viscosity: O.44 mPa/s at 20°C 
The substance is toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

NOTES
Refer for medical attention if breathing difficulties and/or fever develop. 

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
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    See Also:
       Toxicological Abbreviations