SEC-BUTYL ALCOHOL (SEC-BUTANOL)†

Chemical Identification
Chemical Identification
CAS # 78-92-2
Formula

C₄H₁₀O

Synonyms

2-butanol; butylene hydrate; 2-hydroxybutane; methyl ethyl carbinol

Physical Properties
Physical Properties
Physical description Colorless liquid with a strong, pleasant odor.
Boiling point 211°F Molecular weight 74.1
Freezing point/melting point -175°F Vapor pressure 12 mmHg
Flash point 75°F Vapor density
Specific gravity 0.81 Ionization potential 10.10 eV
Lower explosive limit (LEL) 1.7% at 212°F Upper explosive limit (UEL) 9.8% at 212°F
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
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0461
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

Sampling volume (TWA)*

12 L

Sampling flow rate (TWA)*

0.05 L/min

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.

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
Wipe Method
Sampler/Sampling media
Bulk Method
Bulk Method
On-Site Screening Techniques
On-Site Screening Techniques
Device Detector tube Detector tube
Model/Type Gastec 115 Matheson-Kitagawa 8014-189U
Sampling information
(see manufacturer instructions)
3 strokes, 1-150 ppm range, uncertainty 25% for 5-50 ppm, 16% for 50-150 ppm 2 or 4 strokes, approx 4-300 ppm range
Exposure Limits
Exposure Limits
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
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA

150 ppm (450 mg/m³)

REL-TWA

100 ppm (305 mg/m³)

TLV-TWA

100 ppm [2001]

PEL-TWA

100 ppm (305 mg/m³)

PEL-STEL REL-STEL

150 ppm (455 mg/m³)

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:

See 29 CFR 1910.1000 Table Z-1.

Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH

2000 ppm

Carcinogenic classifications: Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Sec-Butyl alcohol

NIOSH: Pocket Guide to Chemical Hazards - Sec-Butyl alcohol

Literature References

  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - sec-Butanol. See annual publication for most recent information.

Last Updated Date : 01/11/2021