# NIOSH Pocket Guide to Chemical Hazards
Cyclopentane | CAS 287-92-3
C5H10 | RTECS GY2390000
Synonyms & Trade Names Pentamethylene | DOT ID & Guide 1146 128
Exposure Limits | NIOSH REL: TWA 600 ppm (1720 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 2.87 mg/m3
Physical Description Colorless liquid with a mild, sweet odor.
MW: 70.2 | BP: 121°F | FRZ: -137°F | Sol: Insoluble
VP(88°F): 400 mmHg | IP: 10.52 eV |  | Sp.Gr: 0.75
Fl.P: -35°F | UEL: 8.7% | LEL: 1.1% |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Strong oxidizers (e.g., chlorine, bromine, fluorine)
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: Daily Remove: When wet (flammable) Change: No recommendation | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, nose, throat; dizziness, euphoria, incoordination, nausea, vomiting, stupor; dry, cracking skin
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION