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
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 100F and below 140F.
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