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Chemical Sampling Information (CSI)
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General Description

Synonyms: Methyl amyl alcohol; 4-Methyl-2-pentanol; MIBC

OSHA IMIS Code Number: 1670

Chemical Abstracts Service (CAS) Registry Number: 108-11-2

Other Chemical Abstracts Service (CAS) Registry Numbers: 105-30-6

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: SA7350000; 54780

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: UN2053 129 Flammable Liquid

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

Chemical Description and Physical Properties:

colorless liquid with a mild odor
molecular weight: 102
vapor pressure: 3.8 mm
boiling point: 269°F
melting point: -130°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 25 ppm, 100 mg/m3 (Skin)

Construction Industry: 25 ppm, 100 mg/m3 TWA (Skin)

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 25 ppm, 104 mg/m3 TWA; 40 ppm, 167 mg/m3 STEL (Skin)

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

Health Factors

Potential Symptoms: Eye irritation; headaches; drowsiness; dermatitis

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15) Narcosis (HE8)

Affected Organs: Eyes, skin

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Charcoal Tube (100/50 mg sections, 20/40 mesh)
    analytical solvent: (95:5) Carbon Disulfide/Isopropanol
    alternate analytical 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: 1 (NIOSH 1402 [24 KB PDF, 4 pages])
    method classification: Partially Validated

Secondary Laboratory Sampling/Analytical Method (SAM2):

  • device: Detector Tube
    company: MSA
    part #: 95097
    range #: 25-1000 ppm
    class: Mfg

  • device: Instrumentation
    company: Infrared Spectrophotometer
    part #: MIRAN 1A & 1B
    range #: 0.8 ppm @ 8.7 um
    class: Mfg

Wipe Sampling Method:

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

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