Peracetic acid
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Peracetic acid (also known as peroxyacetic acid, or PAA) 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.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Ethaneperoxoic acid[1] | |||
Other names
Peroxyacetic acid Acetic peroxide Acetyl hydroperoxide Proxitane | |||
Identifiers | |||
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3D model (JSmol) |
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Abbreviations | PAA | ||
ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.001.079 | ||
EC Number |
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KEGG |
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PubChem CID |
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RTECS number |
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UNII | |||
UN number | 3107 3105 | ||
CompTox Dashboard (EPA) |
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Properties | |||
CH3CO3H | |||
Molar mass | 76.05 g/mol | ||
Appearance | Colorless liquid | ||
Density | 1.0375 g/mL | ||
Melting point | 0 °C (32 °F; 273 K)[2] | ||
Boiling point | 105 °C (221 °F; 378 K) 25 C @ (1.6 kPa)[2] | ||
Acidity (pKa) | 8.2 | ||
Refractive index (nD) |
1.3974 (589 nm, 20 °C)[2] | ||
Viscosity | 3.280 cP | ||
Pharmacology | |||
QG51AD03 (WHO) | |||
Hazards | |||
GHS labelling: | |||
Danger | |||
H226, H242, H302, H312, H314, H332, H400 | |||
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) | |||
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).
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Close
Peracetic acid is a weaker acid than the parent acetic acid, with a pKa of 8.2.[2]