September 2010
NIOSH Publication Number 2010-168c

o-Chlorostyrene

Synonyms & Trade Names
2-Chlorostyrene, ortho-Chlorostyrene, 1-Chloro-2-ethenylbenzene
CAS No.
2039-87-4
RTECS No.
WL4160000
DOT ID & Guide
Formula
ClC6H4CH=CH2
Conversion
1 ppm = 5.67 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 50 ppm (285 mg/m3) ST 75 ppm (428 mg/m3)
OSHA PEL
†: none
Measurement Methods

None available
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
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
Personal Protection/Sanitation
(See protection codes)
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

See also: INTRODUCTION   See ICSC CARD: 1388