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Chemical Sampling Information (CSI)
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General Description

Synonyms: 4-Chloronitrobenzene; p-Chloronitrobenzene; 1-Chloro-4-nitrobenzene; PNCB

OSHA IMIS Code Number: 1872

Chemical Abstracts Service (CAS) Registry Number: 100-00-5

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: CZ1050000; 13723

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1578 Poison

Chemical Description and Physical Properties:

yellow solid with a sweet odor
molecular weight: 158
vapor pressure: <1 mm
boiling point: 468°F
melting point: 181°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 1.0 mg/m3 (Skin)

Construction Industry: 1 mg/m3 TWA (Skin)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 0.1 ppm, 0.64 mg/m3 TWA (Skin); Appendix A3 (Confirmed Animal Carcinogen with Unknown Relevance to Humans)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): Potential Carcinogen, Lowest Feasible Concentration (Skin)

Health Factors

Potential Symptoms: Anoxia; unpleasant taste; mild anemia; (carcinogenic); In animals: hematuria, hemoglobinuria

Health Effects: Methemoglobinemia (HE13); Anemias (HE12)

Affected Organs: Blood, liver, kidneys, CVS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Silica Gel Tube (150/75 mg sections, 20/40 mesh)
    analytical solvent: Methanol
    maximum volume: 150 Liters
    maximum flow rate: 1.0 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 2005 [38 KB PDF, 5 pages])
    sampling analytical error: 0.17
    method classification: Fully Validated

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