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tert-Butyl Alcohol
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General Description
    Synonyms: tert-Butanol; 2-Methyl-2-propanol; TBA; Trimethylcarbinol

    OSHA IMIS Code Number: 0462

    Chemical Abstracts Service (CAS) Registry Number: 75-65-0

    NIOSH, Registry of Toxic Effects (RTECS) Identification Number: EO1925000

    Department of Transportation Regulation Number (49 CFR 172.101) and guide [2008 Emergency Response Guidebook, 2.5 MB PDF]: 1120 129

    NIOSH Pocket Guide to Chemical Hazards, tert-Butyl Alcohol: chemical description, physical properties, potentially hazardous incompatibilities, and more
Exposure Limits
    OSHA Permissible Exposure Limit (PEL) for General Industry: 29 CFR 1910.1000 Z-1 Table -- 100 ppm, 300 mg/m3 TWA

    OSHA Permissible Exposure Limit (PEL) for Construction Industry: 29 CFR 1926.55 Appendix A -- 100 ppm, 300 mg/m3 TWA

    OSHA Permissible Exposure Limit (PEL) for Maritime: 29 CFR 1915.1000 Table Z-Shipyards -- 100 ppm, 300 mg/m3 TWA

    American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 100 ppm, 303 mg/m3 TWA; Appendix A4 - Not Classifiable as a Human Carcinogen (TLV listed under tert-Butanol)

    National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 100 ppm, 300 mg/m3 TWA; 150 ppm, 450 mg/m3 STEL
Health Factors
    NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 1,600 ppm

    Potential symptoms: Drowsiness, dizziness, narcosis; headache; eye, skin, nose, throat irritation; dry skin, redness, dermatitis.

    Health Effects: : Irritation-Eye, Nose, Throat, Skin---Moderate (HE15); Narcosis (HE8); Explosive, Flammable, Safety (HE18)

    Affected organs: Eyes, skin, respiratory system, CNS

    Note: Insufficient odor warning when exposure limit is exceeded. Highly flammable, and vapor/air mixtures are explosive.

    Date Last Revised: 01/22/2004

    Literature Basis:
Monitoring Methods used by OSHA
    Laboratory Sampling/Analytical Method:

    • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
      analytical solvent: (99:1) Carbon Disulfide/2-Butanol
      alternative solvent: (99:1) Carbon Disulfide/Dimethylformamide
      maximum volume: 10 Liters   maximum flow rate: 0.2 L/min (TWA)
      maximum volume: 3 Liters   maximum flow rate: 0.2 L/min (STEL)
      current analytical method: Gas Chromatography; GC/FID
      method reference: NIOSH Analytical Method (NIOSH 1400) [26 KB, PDF, 4 pages]
      method classification: Partially Validated

    On-Site Sampling Techniques/Methods:

    • device: Detector Tube
      manufacturer: Gastec
      model/type: 102L
      sampling information: 2 strokes
      upper measurement limit: 1.2%
      detection limit: approximately 0.05%
      overall uncertainty: unknown
      method reference: on-site air secondary (manufacturer)

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