| IUPAC name
| Other names
|Molar mass||76.05 g/mol|
|Density|| Conc. 38-40%|
1.226 g/cm3 (15 °C)
1.14 g/cm3 (20 °C)
|Melting point||0 °C (32 °F; 273 K)|
|Boiling point||105 °C (221 °F; 378 K)|
|Solubility|| Miscible with alcohols, carboxylic acids|
Soluble in ether
|Vapor pressure||14.5 mmHg (at 25 °C)|
|Safety data sheet||Merck (38-40%)|
|Flash point||40.5 °C (104.9 °F; 313.6 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Peracetic acid (also known as peroxyacetic acid) or PAA, is an organic compound, a carboxylic acid with the formula CH3CO3H.
Peracetic acid will oxidize various alkenes to epoxides, though not all alkenes are susceptible.
Peracetic acid is a weaker acid than the parent acetic acid, with a pKa of 8.2.
Peracetic acid is a colorless liquid, with an acrid pungent smell, miscible with water.
Peracetic acid solutions are sold by various chemical suppliers.
Peracetic acid is always sold in solution as a mixture with acetic acid and hydrogen peroxide to maintain its stability. The concentration of the acid as the active ingredient can vary.
Peracetic acid is produced industrially by the autoxidation of acetaldehyde:
- O2 + CH3CHO → CH3CO3H
- H2O2 + CH3CO2H → CH3CO3H + H2O
Acetic anhydride can be used to generate low water content peracetic acid.
Peracetic acid is generated in situ by some laundry detergents. This route involves the reaction of tetraacetylethylenediamine (TAED) in the presence of an alkaline hydrogen peroxide solution.
- Make epoxides
- Antimicrobial agent
Peracetic acid is highly corrosive and at high concentrations it may violently decompose.
In closed bottles, best with a pressure release stopper.
Strongly dilute in in water, then neutralize it with a base.