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Chemical Sampling Information (CSI)
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General Description

Synonyms: Methylacrylonitrile

OSHA IMIS Code Number: 1654

Chemical Abstracts Service (CAS) Registry Number: 126-98-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: UD1400000; 67176

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 3079 131P

NIOSH Pocket Guide to Chemical Hazards, Methylacrylonitrile: chemical description, physical properties, potentially hazardous incompatibilities, and more

Chemical Description and Physical Properties:

molecular weight: 67.10
molecular formula: C4H5N

Exposure Limits

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 1 ppm, 2.7 mg/m3 TWA (Skin)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 1 ppm TWA(skin)

Health Factors

Health Effects: Cumulative CNS effects (HE7) Irritation-Eye, Skin---Mild (HE16)

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: Acetone
    maximum volume: 20 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/NPD
    method reference: 2 (OSHA In-House File)
    method classification: Not Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: Draeger
    part #: 67 30301
    range #: 1-10 ppm
    class: Mfg

  • device: Detector Tube
    company: Gastec
    part #: 192
    range #: 0.2-32.0 ppm
    class: Mfg

  • device: Detector Tube
    company: MSA
    part #: 91624
    range #: 10-80 ppm, pyrolyzer required
    class: Mfg

Wipe Sampling Method:

  • Wipe with charcoal pad, seal in glass vial for shipment.

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