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tert-Butyl Alcohol

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 of Chemical Substances (RTECS) Identification Number: EO1925000
  • Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 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):
  • 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
  • Notes:
    1. Insufficient odor warning when exposure limit is exceeded. Highly flammable, and vapor/air mixtures are explosive.
  • Literature Basis:
  • Date Last Revised: 01/22/2004

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Charcoal Tube (100/50 mg sections, 20/40 mesh)
  • 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
  • analytical solvent: (99:1) Carbon Disulfide/2-Butanol
  • alternative solvent: (99:1) Carbon Disulfide/Dimethylformamide
  • method reference: NIOSH Analytical Method (NIOSH 1400 (PDF))
  • method classification: Partially Validated
On-Site Sampling Techniques/Methods:
  • 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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