NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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. See: IDLH INDEX
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
Not available.
Important additional information about respirator selection
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   See ICSC CARD: 1388