Label abbreviations descriptions

O-CHLOROSTYRENE

Chemical Identification
CAS # 2039-87-4
Formula

C₈H₇Cl
Synonyms

2-chlorostyrene; ortho-chlorostyrene; 1-chloro-2-ethenylbenzene

Physical Properties
Physical description Colorless liquid.
Boiling point 372°F Molecular weight 138.6
Freezing point/melting point -81.7°F Vapor pressure 0.96 mmHg at 77°F
Flash point 138°F Vapor density
Specific gravity 1.10 Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating NFPA fire rating
NFPA reactivity rating NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0682
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
Sampling volume (TWA)*

3 L
Sampling flow rate (TWA)*

0.01-0.2 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference NIOSH 1003 (partially validated)
Notes
Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA REL-TWA

50 ppm (285 mg/m³)

 TLV-TWA

50 ppm [1972]

 PEL-TWA

50 ppm (285 mg/m³)
PEL-STEL REL-STEL

75 ppm (428 mg/m³)

 TLV-STEL

75 ppm [1972]

 PEL-STEL

75 ppm (428 mg/m³)
PEL-C REL-C TLV-C PEL-C
Skin notation

NA

 Skin notation

N

 Skin notation

N

 Skin notation

N
Notes:

Not established

 Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: Not listed Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 01/07/2021