Label abbreviations descriptions

ISOBUTYL ACETATE†

Chemical Identification
CAS # 110-19-0
Formula

C₆H₁₂O₂
Synonyms

isobutyl ester of acetic acid; 2-methylpropyl acetate; 2-methylpropyl ester of acetic acid; β-methylpropyl ethanoate

Physical Properties
Physical description Colorless liquid with a fruity, floral odor.
Boiling point 243°F Molecular weight 116.2
Freezing point/melting point -145°F Vapor pressure 13 mmHg
Flash point 64°F Vapor density
Specific gravity 0.87 Ionization potential 9.97 eV
Lower explosive limit (LEL) 1.3% Upper explosive limit (UEL) 10.5%
NFPA health rating 1 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
Analyte code (IMIS no.) 1534 1534
Sampling group OVSG-1
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01] SKC 575-002 Passive Sampler [SKC 575-002]
Sampling time*

240 min

240 min TWA; 15 min STEL
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 GC-FID
Method reference OSHA 5000 (fully validated) OSHA 1009 (fully validated)
Notes

To obtain sampling and analytical error similar to that available with active sampling, knowledge of the atmospheric pressure and temperature are required, and these should be obtained using NIST-traceable devices. If that is not possible, temperature is assumed to be 22.2 °C, and the atmospheric pressure is estimated based on the elevation of the sampling location. When estimates are used in place of traceable measurements the sampling and analytical error associated with passive sampling is substantially increased, and this makes it more difficult to demonstrate overexposures after considering the 95% lower confidence limit.
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.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

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 (700 mg/m³

 REL-TWA

150 ppm (700 mg/m³)

 TLV-TWA

50 ppm [2015]

 PEL-TWA

150 ppm (700 mg/m³)
PEL-STEL REL-STEL TLV-STEL

150 ppm [2015]

 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

1300 ppm
Carcinogenic classifications: Not listed Notes:

10% of LEL
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 04/13/2021