Peracetic acid

Peracetic acid or percidine
Names
	Preferred IUPAC name Ethaneperoxoic acid
	Other names Peroxyacetic acid; Acetic peroxide; Acetyl hydroperoxide; Proxitane; Percidine
Identifiers
CAS Number	79-21-0 ;
3D model (JSmol)	Interactive image;
Abbreviations	PAA
ChEBI	CHEBI:42530;
ChEMBL	ChEMBL444965 ;
ChemSpider	6336 ;
ECHA InfoCard	100.001.079
EC Number	201-186-8;
KEGG	D03467 ;
PubChem CID	6585;
RTECS number	SD8750000;
UNII	I6KPI2E1HD ;
UN number	3107 3105
CompTox Dashboard (EPA)	DTXSID1025853 ;
	InChI InChI=1S/C2H4O3/c1-2(3)5-4/h4H,1H3 Key: KFSLWBXXFJQRDL-UHFFFAOYSA-N ; InChI=1/C2H4O3/c1-2(3)5-4/h4H,1H3 Key: KFSLWBXXFJQRDL-UHFFFAOYAD;
	SMILES CC(=O)OO;
Properties
Chemical formula	CH3CO3H
Molar mass	76.05 g/mol
Appearance	Colorless liquid
Density	1.0375 g/mL
Melting point	0 °C (32 °F; 273 K)
Boiling point	105 °C (221 °F; 378 K) 25 C @ (1.6 kPa)
Acidity (pKa)	8.2
Refractive index (nD)	1.3974 (589 nm, 20 °C)
Viscosity	3.280 cP
Pharmacology
ATCvet code	QG51AD03 (WHO)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H226, H242, H302, H312, H314, H332, H400
Precautionary statements	P210, P220, P233, P234, P240, P241, P242, P243, P260, P261, P264, P270, P271, P273, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P363, P370+P378, P391, P403+P235, P405, P411, P420, P501
NFPA 704 (fire diamond)	3 2 2 OX
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). verify (what is ?) Infobox references

Peracetic acid (also known as peroxyacetic acid, or Percidine) is an organic compound with the formula CH₃CO₃H. This peroxy acid is a colorless liquid with a characteristic acrid odor reminiscent of acetic acid. It can be highly corrosive.

Peracetic acid is a weaker acid than the parent acetic acid, with a pK_a of 8.2.