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Chemical Sampling Information (CSI)
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General Description

OSHA IMIS Code Number: 2185

Chemical Abstracts Service (CAS) Registry Number: 627-13-4

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UK0350000; 68740

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN1865 Flammable Liquid

Chemical Description and Physical Properties:

colorless to pale yellow liquid with an ether-like odor
molecular weight: 105
vapor pressure: 40 mm
boiling point: 110°C
melting point: -100°C

Incompatibilities: Strong oxidizers, combustibles

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 25 ppm, 110 mg/m3

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 25 ppm, 107 mg/m3 TWA; 40 ppm, 172 mg/m3 STEL

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 25 ppm TWA, 40 ppm STEL

Health Factors

Health Effects: Cumulative systemic effects (HE3); Methemoglobinemia (HE3) Irritation-Skin---Moderate (HE15)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Carbon Disulfide
    maximum volume: 70 Liters
    maximum flow rate: 1.0 L/min (TWA)
    maximum volume: 15 Liters
    maximum flow rate: 1.0 L/min (STEL)
    current analytical method: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH S-227)
    sampling and analytical error: 0.09
    method classification: Fully Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: MSA
    part #: 91624
    range: 10-100 ppm, Pyrolyzer required
    class: Mfg
  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range: 0.4 ppm @ 10.4 um
    class: Mfg

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