IPCS INCHEM Home
CYCLOPENTANEICSC: 0353
June 2011
CAS #: 287-92-3Pentamethylene
UN #: 1146
EINECS #: 206-016-6

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable. Heating will cause rise in pressure with risk of bursting.  Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.  NO open flames, NO sparks and NO smoking.  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.  Use foam, carbon dioxide, powder. Water may be ineffective.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Nausea. Headache. Dizziness. Incoordination. Drowsiness. Unconsciousness.  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 CLASSIFICATION & 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. 

According to UN GHS Criteria

flam;flameexcl mark;warncancer;health haz
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 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: II 

STORAGE
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. 
PACKAGING
 
CYCLOPENTANE ICSC: 0353
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: C5H10
Molecular mass: 70.1
Boiling point: 49°C
Melting point: -94°C
Relative density (water = 1): 0.8 (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 


EXPOSURE & HEALTH EFFECTS

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

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. 

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

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


Occupational exposure limits
TLV: 600 ppm as TWA 

ENVIRONMENT
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
  EC Classification
Symbol: F; R: 11-52/53; S: (2)-9-16-29-33-61 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations