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Chemical Sampling Information (CSI)
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General Description

Synonyms: Isobutanol; IBA; 2-Methyl-1-propanol; Isopropylcarbinol

OSHA IMIS Code Number: 1536

Chemical Abstracts Service (CAS) Registry Number: 78-83-1

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: NP9625000

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: 1212 129

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

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 29 CFR 1910.1000 Table Z-1 -- 100 ppm, 300 mg/m3 TWA

Construction Industry: 29 CFR 1926.55 Appendix A -- 100 ppm, 300 mg/m3 TWA

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): 50 ppm, 152 mg/m3 TWA (Listed under Isobutanol)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 50 ppm, 150 mg/m3 TWA

Health Factors

NIOSH Immediately Dangerous To Life or Health Concentration (IDLH): 1,600 ppm

Potential Symptoms: Eye, throat irritation; headaches; dizziness; drowsiness; eye redness, pain, blurred vision; skin irritation, cracking, dermatitis; in animals: narcosis; INGES ACUTE: nausea, vomiting, diarrhea

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15)

Affected Organs: Eyes, skin, respiratory system, CNS

Notes:

  1. Above 28°C, explosive vapor/air mixtures may be formed.
  2. Listed among FDA's "food additives permitted for direct addition to food for human consumption" (21CFR 172.515).

Literature Basis:

Date Last Revised: 02/04/2004

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: (99:1) Carbon Disulfide:Isopropanol
    alternative solvent: (99:1) Carbon Disulfide:Dimethylformamide
    alternative solvent: (95:5) Methylene Chloride:Methanol
    maximum volume: 10 Liters
    maximum flow rate: 0.2 L/min
    current analytical method: Gas Chromatography; GC/FID
    method reference: NIOSH Analytical Method (NIOSH 1401 [24 KB PDF, 4 pages])
    method classification: Fully Validated

On-Site Sampling Techniques/Methods:

  • device: Detector Tube
    manufacturer: Gastec
    model/type: 116
    sampling information: 2 strokes
    upper measurement limit: 150 ppm
    detection limit: 1 ppm
    overall uncertainty: 25% for 5 to 50 ppm, 16% for 50 to 150 ppm
    method reference: on-site air secondary (manufacturer)

  • device: Detector Tube
    manufacturer: Matheson-Kitagawa
    model/type: 8014-208U
    sampling information: 3 strokes
    upper measurement limit: 100 ppm
    detection limit: approximately 2 ppm
    overall uncertainty: unknown
    method reference: on-site air secondary (manufacturer)

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