O-CHLOROBENZYLIDENE MALONONITRILE†

Chemical Identification
Chemical Identification
CAS # 2698-41-1
Formula

C₁₀H₅ClN₂

Synonyms

2-chlorobenzalmalonitrile; CS; OCBM

Physical Properties
Physical Properties
Physical description White crystalline solid with a pepper-like odor.
Boiling point 590-599°F Molecular weight 187.6
Freezing point/melting point 203-205°F Vapor pressure 0.00003 mmHg
Flash point Vapor density 6.52
Specific gravity 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
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0623
Sampling group
Sampler/Sampling media
Sampling time*
Sampling volume (TWA)*
Sampling flow rate (TWA)*
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments
Method reference OSHA Modified NIOSH Analytical Method (NIOSH P&CAM 304)
Notes

OSHA CSHOs please contact the SLTC prior to sampling.

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.

Wipe Method
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)
Exposure Limits
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

0.05 ppm (0.4 mg/m³)

REL-TWA TLV-TWA PEL-TWA
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C

0.05 ppm (0.4 mg/m³)

TLV-C

0.05 ppm (inhalable fraction and vapor) [1990]

PEL-C

0.05 ppm (0.4 mg/m³)

Skin notation

N

Skin notation

Y

Skin notation

Y

Skin notation

Y

Notes:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

2 mg/m³

Carcinogenic classifications: TLV-A4 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

0.005 mg/m³/0.1 mg/m³/25 mg/m³

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - O-Chlorobenzylidene malononitrile

NIOSH: Pocket Guide to Chemical Hazards - o-Chlorobenzylidene malononitrile

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - o-Chlorobenzylidene malononitrile. See annual publication for most recent information.

Last Updated Date : 01/07/2021