- Peracetic acid
Chembox new
Name = Peracetic acid
ImageFileL1 = Peracetic acid.png
ImageSizeL1 = 100px
ImageNameL1 = Peroxyacetic acid
ImageFileR1 = Peracetic-acid-3D-balls.png
ImageNameR1 = Peroxyacetic acid
ImageSizeR1 = 120px
IUPACName = ethaneperoxoic acid
OtherNames = Peroxyacetic acid
Acetic peroxide
Acetyl hydroperoxide
Proxitane
Section1 = Chembox Identifiers
Abbreviations = PAA
SMILES = CC(=O)OO
CASNo = 79-21-0
RTECS = SD8750000
Section2 = Chembox Properties
Formula = C2H4O3
MolarMass = 76.05
Appearance = Colourless liquid
Density = 1.13 g/ml (liquid)
SolubilityOther =
Solvent = solvent
MeltingPt = 0.1 °C
BoilingPt = 105 °C
pKa = 8.20
Viscosity = 3.280 cP|25
Section7 = Chembox Hazards
EUClass = O, C, N
NFPA-H = 3
NFPA-F = 2
NFPA-R = 4
NFPA-O = ox
SPhrases = (1/2-)-3/7-14-36/37/39-45-61
FlashPt = 40.5 °CPeracetic acid (peroxyacetic acid, or PAA), is a
chemical in theorganic peroxide family. It is a bright, colorless liquid with a characteristic acridacetic acid type odor. It has a strong oxidizing potential, is highlycorrosive , and can explode at temperatures exceeding 110 °C.Fact|date=October 2007Production
Peracetic acid is produced by continuously feeding
acetic acid andhydrogen peroxide into an aqueous reaction medium containing asulfuric acid catalyst . The reaction is allowed to continue for up to ten days in order to achieve high yields of product according to the following equation.United States Department of Agriculture. Agriculture Marketing Service [http://www.ams.usda.gov/nop/NationalList/TAPReviews/PeraceticAcid2.pdf Peracetic acid] . (PDF document). URL accessed on 11 November 2006.]:
Peracetic acid is always sold in solution with acetic acid and hydrogen peroxide to maintain the stability of the chemical. The concentration of the acid as the active ingredient can vary, and usually depends on its application. Additional methods of preparation involve the oxidation of
acetaldehyde or alternatively as an end product of the reaction ofacetic anhydride , hydrogen peroxide, and sulfuric acid. Another method involves the reaction oftetraacetylethylenediamine (TAED) in the presence of analkaline hydrogen peroxide solution. PAA is also formed naturally in the environment through a series ofphotochemical reaction s involvingformaldehyde and photo-oxidant radicals.U.S. National Library of Medicine. [http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?hsdbb.htm Hazardous Substances Data Bank] . URL accessed on 11 November 2006.]Uses
Antimicrobial agent
Peracetic acid is an ideal antimicrobial agent due to its high oxidising potential. It is broadly effective against microorganisms and is not deactivated by
catalase andperoxidase , the enzymes which break down hydrogen peroxide. It also breaks down food to safe and environmentally friendly residues (acetic acid and hydrogen peroxide), and therefore can be used in non-rinse applications. It can be used over a wide temperature range (0-40 °C), widepH range (3.0-7.5), inclean-in-place (CIP) processes, inhard water conditions, and is not affected by protein residues.Mechanism of action
Peracetic acid kills microorganisms by oxidation and subsequent disruption of their cell membrane, via the hydroxyl radical (OH·). As diffusion is slower than the half-life of the radical, it will react with any oxidizable compound in its vicinity. It can damage virtually all types of macromolecules associated with a microorganism: carbohydrates, nucleic acids (
mutation s), lipids (lipid peroxidation ) and amino acids (e.g. conversion ofPhe to m-Tyr and o-Tyr). This ultimately leads to celllysis and true microbial death.Application
US EPA first registered peracetic acid as anantimicrobial in 1985 for indoor use on hard surfaces. Use sites include agricultural premises, food establishments, medical facilities, and home bathrooms. Peracetic acid is also registered for use in dairy/cheese processing plants, on food processing equipment and in pasteurizers in breweries, wineries, and beverage plants.U.S. Environmental Protection Agency. [http://www.epa.gov/pesticides/factsheets/chemicals/hydrogenperoxide_peroxyaceticacid_factsheet.htm Hydrogen Peroxide and Peroxyacetic Acid] . URL accessed on 11 November 2006.] It is also applied for the disinfection of medical supplies, to prevent bio film formation in pulp industries, and as a water purifier and disinfectant. Peracetic acid can be used as acooling tower water disinfect where it prevents bio film formation and effectively controlsLegionella bacteria.ynthesis chemical
Peracetic acid can be used as a synthesis chemical, where its oxidizing properties are used to add an oxygen atom to double bonds, e.g. in
ethene andpropene , to formepoxide s andalcohol s. It can also be used in producing syntheticglycerol frompropene , and is used innylon manufacturing.KEMI - Information on Substances. [http://www.apps.kemi.se/flodessok/floden/kemamne_eng/perattiksyra_eng.htm Peracetic Acid] . URL accessed on 11 November 2006.]Bleaching agent
Peracetic acid can be used as a
bleaching agent . Since it emits oxygen more readily and at lower temperatures than other bleaching agents, it is gentle on the material to be bleached. Bleaching ofwood pulp with peracetic acid givespaper which is totallychlorine free (TCF).ee also
*
Disinfection
*Hydroxyl
*Organic peroxide
*Peroxy acid References
Wikimedia Foundation. 2010.