# NIOSH Pocket Guide to Chemical Hazards
o-Chlorostyrene | CAS 2039-87-4
ClC6H4CH=CH2 | RTECS WL4160000
Synonyms & Trade Names 2-Chlorostyrene, ortho-Chlorostyrene, 1-Chloro-2-ethenylbenzene | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 50 ppm (285 mg/m3) ST 75 ppm (428 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 5.67 mg/m3
Physical Description Colorless liquid.
MW: 138.6 | BP: 372°F | FRZ: -82°F | Sol: Insoluble
VP(77°F): 0.96 mmHg | IP: ? |  | Sp.Gr: 1.10
Fl.P: 138°F | UEL: ? | LEL: ? |
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities None reported
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated 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 In animals: irritation eyes, skin; hematuria (blood in the urine), proteinuria, acidosis; enlarged liver, jaundice
Target Organs Eyes, skin, liver, kidneys, central nervous system, peripheral nervous system
See also: INTRODUCTION