Label abbreviations descriptions

PERACETIC ACID

Chemical Identification
CAS # 79-21-0
Formula

C₂H₄O₃
Synonyms

peroxyacetic acid; acetic peroxide; monoperacetic acid; peroxoacetic acid

Physical Properties
Physical description Colorless liquid with a strong, pungent, acrid odor.
Boiling point 221°F Molecular weight 76.05
Freezing point/melting point -22 to 32°F Vapor pressure
Flash point 105°F (60% acetic acid solution) Vapor density
Specific gravity 1.226 at 59°F Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 3 NFPA fire rating 2
NFPA reactivity rating 4 NFPA special instruction OX: Possesses oxidizing properties.
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) P230
Sampling group
Sampler/Sampling media 25-mm quartz fiber filter, coated with titanium oxysulfate, followed by an impinger containing methyl p-tolyl sulfide (MTS) and 4-chlorophenyl methyl sulfone in acetonitrile (ACN) [SLTC116]
Sampling time*

15 min
Sampling volume (TWA)*

15 L
Sampling flow rate (TWA)*

1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference OSHA PV2321 (partially validated)
Notes

The sampling method described in OSHA Method PV2321 will collect both particulate and vapor. However, any peracetic acid particulate collected on the pre-filter (H₂O₂ scrubber) will volatilize quickly, and the resultant vapor will be collected in the impinger solution.
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
 

 

 REL-TWA
 

 

 TLV-TWA
 

 

 PEL-TWA
 

 
PEL-STEL
 

 

 REL-STEL
 

 

 TLV-STEL
 

0.4 ppm (inhalable fraction and vapor) [2013]

 PEL-STEL
 

 
PEL-C
 

 

 REL-C
 

 

 TLV-C
 

 

 PEL-C
 

 
Skin notation
 

NA

 Skin notation
 

NA

 Skin notation
 

N

 Skin notation
 

NA
Notes:
 

Not established

 Notes:
 

Not established

 Notes:
 

 

 Notes:
 

Not established
Health factors:  See NIH-NLM PubChem. IDLH
 

0.64 ppm (1.7 mg/m³)
Carcinogenic classifications: TLV-A4 Notes:
 

existing IDLH under review by NIOSH
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References

Last Updated Date : 01/22/2021