ISOBUTYL ALCOHOL (ISOBUTANOL)†
Chemical Identification | |
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CAS # | 78-83-1 |
Formula |
C₄H₁₀O |
Synonyms |
IBA; isopropylcarbinol; 2-methyl-1-propanol |
Physical Properties | |||
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Physical description | Colorless, oily liquid with a sweet, musty odor. | ||
Boiling point | 227°F | Molecular weight | 74.12 |
Freezing point/melting point | -162°F | Vapor pressure | 9 mmHg |
Flash point | 82°F | Vapor density | 2.55 |
Specific gravity | 0.8 | Ionization potential | 10.12 eV |
Lower explosive limit (LEL) | 1.2% | Upper explosive limit (UEL) | 10.9% |
NFPA health rating | 2 | NFPA fire rating | 3 |
NFPA reactivity rating | 0 | NFPA special instruction | |
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | 1536 | |||||
Sampling group | OVSG-2 | |||||
Sampler/Sampling media | 2 Anasorb 747 sampling tubes (6 mm glass tubes, the front tube contains 400 and the back 200 mg of sorbent) connected in series [SKC 226-82] | |||||
Sampling time* | 240 min |
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Sampling volume (TWA)* | 12 L |
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Sampling flow rate (TWA)* | 0.05 L/min |
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Sampling volume (STEL/Peak/C)* | ||||||
Sampling flow rate (STEL/Peak/C)* | ||||||
Analytical method instruments | GC-FID | |||||
Method reference | OSHA 5001 (fully validated) | |||||
Notes | Separate tubes and seal each after sampling. |
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Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Method | |
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Sampler/Sampling media |
Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | Detector tube | Detector tube | ||||
Model/Type | Gastec 116 | Matheson-Kitagawa 8014-208U | ||||
Sampling information (see manufacturer instructions) |
2 strokes, 1-150 ppm range, uncertainty 25% for 5-50 ppm, 16% for 50-150 ppm | 3 strokes, approx 2-100 ppm range |
Exposure Limits | |||||||
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OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA |
100 ppm (300 mg/m³) |
REL-TWA |
50 ppm (150 mg/m³) |
TLV-TWA |
50 ppm [1973] |
PEL-TWA |
50 ppm (150 mg/m³) |
PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
PEL-C | REL-C | TLV-C | PEL-C | ||||
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes: | Notes: | Notes: | Notes: | ||||
Health factors: See NIH-NLM PubChem. | IDLH |
1600 ppm |
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Carcinogenic classifications: Not listed | Notes: | ||||||
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: |
Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Isobutanol NIOSH: Pocket Guide to Chemical Hazards - Isobutanol alcohol Literature References
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Last Updated Date : 12/31/2020