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Chemical Sampling Information (CSI)
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General Description

Synonyms: sec-Nitropropane

OSHA IMIS Code Number: 1941

Chemical Abstracts Service (CAS) Registry Number: 79-46-9

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: TZ5250000; 66051

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2608 Flammable Liquid

Chemical Description and Physical Properties:

colorless liquid with a mild, fruity odor
molecular weight: 89
vapor pressure: 12.9 mm
boiling point: 248°F
melting point: -135°F

Incompatibilities: Amines, strong acids, alkalies, and oxidizers, metal oxides, combustible materials

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 25 ppm, 90 mg/m3

Construction Industry: 25 ppm, 90 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 ppm, 36 mg/m3 TWA; 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

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans

Potential Symptoms: Headaches; anorexia; nausea, vomiting, diarrhea; respiratory system irritation; (carcinogenic)

Health Effects: Cumulative liver damage (HE3); Mutagen/Suspect carcinogen (HE2) Irritation-Eye, Nose, Throat, Skin---Moderate (HE15)

Affected Organs: Respiratory system, CNS

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: XAD-4 Tube (80/40 mg sections)
    analytical solvent: Carbon Disulfide
    maximum volume:
    4 Liters
    maximum flow rate: 0.1 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: 2 (OSHA 46)
    method classification: Fully Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company:
    MSA
    part #: 91624
    range:
    5-150 ppm, Pyrolyzer required
    class: Mfg

  • device: Instrumentation
    company:
    Organic Vapor Analyzer
    part #: Organic Vapor Analyzer
    class: Mfg

  • device: Instrumentation
    company:
    Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 2.3 ppm @ 11.8 um
    class: Mfg

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