METHYL ACETATE†

Chemical Identification
Chemical Identification
CAS # 79-20-9
Formula
 

C₃H₆O₂

Synonyms
 

methyl ester of acetic acid; methyl ethanoate; methyl acetic ester

Physical Properties
Physical Properties
Physical description Colorless liquid with a fragrant, fruity odor.
Boiling point 135°F Molecular weight 74.1
Freezing point/melting point -145°F Vapor pressure 173 mmHg
Flash point 14°F Vapor density 2.8
Specific gravity 0.93 Ionization potential 10.27 eV
Lower explosive limit (LEL) 3.1% Upper explosive limit (UEL) 16%
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.) 1650
Sampling group
Sampler/Sampling media CSC tube (100/50 mg) [SKC 226-01]
Sampling time*
 

480 min

Sampling volume (TWA)*
 

0.2-10 L

Sampling flow rate (TWA)*
 

0.01-0.2 L/min

Sampling volume (STEL/Peak/C)*
 

 

Sampling flow rate (STEL/Peak/C)*
 

 

Analytical method instruments GC-FID
Method reference NIOSH 1458 (fully validated)
Notes
 
 

 

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
Model/Type
Sampling information
(see manufacturer instructions)
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
 
 

200 ppm (610 mg/m³)

REL-TWA
 
 

200 ppm (610 mg/m³)

TLV-TWA
 
 

200 ppm [2012]

PEL-TWA
 
 

200 ppm (610 mg/m³)

PEL-STEL
 
 

 

REL-STEL
 
 

250 ppm (760 mg/m³)

TLV-STEL
 
 

250 ppm [2012]

PEL-STEL
 
 

250 ppm (760 mg/m³)

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
 
 

3100 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
Additional Resources and Literature References

NOAA: CAMEO Chemicals - Methyl acetate

NIOSH: Pocket Guide to Chemical Hazards - Methyl acetate

Literature References

 
 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - Methyl acetate. See annual publication for most recent information.
  • Kumagai, S., Oda, H., Matsunaga, I, Kosaka, H. and Akasaka, S. Uptake of 10 polar organic solvents during short-term respiration. Toxicol. Sci. 48(2): 255-263, 1999.
  • Pohanish, R.P. (editor): Methyl Acetate. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 2. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 1512-1514.

Last Updated Date : 01/05/2021