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Chemical Sampling Information (CSI)
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General Description

Synonyms: OCBM; CS; o-Chlorobenzylidene Malonitrile

OSHA IMIS Code Number: 0623

Chemical Abstracts Service (CAS) Registry Number: 2698-41-1

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: OO3675000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 2810 153

NIOSH Pocket Guide to Chemical Hazards, o-Chlorobenzylidene Malononitrile: chemical description, physical properties, potentially hazardous incompatibilities, and more

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 29 CFR 1910.1000 Z-1 Table -- 0.05 ppm, 0.4 mg/m3 TWA

Construction Industry: 29 CFR 1926.55 Appendix A -- 0.05 ppm, 0.4 mg/m3 TWA

Maritime Industry: 29 CFR 1915.1000 Table Z-Shipyards -- 0.05 ppm, 0.4 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.05 ppm, 0.39 mg/m3 Ceiling; Skin; Appendix A4 - Not Classifiable as a Human Carcinogen

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 0.05 ppm, 0.4 mg/m3 Ceiling; Skin

Health Factors

NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 2 mg/m3 Potential symptoms: Painful, burning eyes, lacrimation, conjunctivitis, erythematic eyelids, blepharospasms; irritated throat, cough, chest constriction; headaches; erythmatic vesiculation of skin

Health Effects: Irritation-Eyes, Nose, Throat, Skin---Marked (HE14)

Affected organs: Respiratory system, skin, eyes

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • Sampling Media: OSHA Versatile Sampler (OVS-Tenax) - 13 mm Tenax Tube (140/70 mg sections) with a Glass Fiber filter enclosed
    Analytical Solvent: 20% Methylene Chloride in Hexane
    Maximum volume: 90 Liters
    Maximum Flow Rate: 1.5 L/min (TWA)
    Minimum time: 15 Minutes
    Maximum Flow Rate: 1.5 L/min (Ceiling)
    Current Analytical Method: High Performance Liquid Chromatography; HPLC/UV
    Method Reference: OSHA Modified NIOSH Analytical Method (NIOSH P&CAM 304)
    Method Classification: Proposed

Bulk method:

  • Limit the amount of bulk submitted to one gram or one mL.
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