potassium ascorbate

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| ImageFile = Potassium ascorbate.png

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| PIN = Potassium (2R)-2-[(1S)-1,2-dihydroxyethyl]-4-hydroxy-5-oxo-2,5-dihydrofuran-3-olate

| OtherNames = Monopotassium ascorbate; Potassium L-ascorbate

|Section1={{Chembox Identifiers

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| CASNo = 15421-15-5

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = X5523762RI

| PubChem = 23687519

| SMILES = OC1=C([O-])[C@]([C@@H](O)CO)([H])OC1=O.[K+]

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|Section2={{Chembox Properties

| C=6 | H=7 | K=1 | O=6

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| Solubility = 98g/100mL{{cite book |last=Burdoch |first=George A. |title=Encyclopedia of food and color additives |year=1997 |publisher=CRC Press |location=Boca Raton, Florida |isbn=0-8493-9412-0 |url=https://books.google.com/books?id=5BZ39iL0XfQC&pg=PA207 |accessdate=2012-09-30 |page=207}}}}

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Potassium ascorbate is a compound with formula KC₆H₇O₆. It is the potassium salt of ascorbic acid (vitamin C) and a mineral ascorbate. As a food additive, it has E number E303, INS number 303. Although it is not a permitted food additive in the UK, USA and the EU,UK Food Standards Agency: {{cite web |url=http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist |title=Current EU approved additives and their E Numbers |accessdate=2011-10-27}}{{Cite web|last=Noshly|title=Wise Eating, Made Easy|url=http://noshly.com/|access-date=2022-02-06|website=Noshly|language=en}} it is approved for use in Australia and New Zealand.Australia New Zealand Food Standards Code{{cite web |url=http://www.comlaw.gov.au/Details/F2011C00827 |title=Standard 1.2.4 - Labelling of ingredients |date=8 September 2011 |accessdate=2011-10-27}} According to some studies, it has shown a strong antioxidant activity and antitumoral properties.{{Cite journal|last1=FRAJESE|first1=GIOVANNI VANNI|last2=BENVENUTO|first2=MONICA|last3=FANTINI|first3=MASSIMO|last4=AMBROSIN|first4=ELENA|last5=SACCHETTI|first5=PAMELA|last6=MASUELLI|first6=LAURA|last7=GIGANTI|first7=MARIA GABRIELLA|last8=MODESTI|first8=ANDREA|last9=BEI|first9=ROBERTO|date=June 2016|title=Potassium increases the antitumor effects of ascorbic acid in breast cancer cell lines in vitro|journal=Oncology Letters|volume=11|issue=6|pages=4224–4234|doi=10.3892/ol.2016.4506|issn=1792-1074|pmc=4888082|pmid=27313770}}{{Cite journal|last1=Cavicchio|first1=Carlotta|last2=Benedusi|first2=Mascia|last3=Pambianchi|first3=Erika|last4=Pecorelli|first4=Alessandra|last5=Cervellati|first5=Franco|last6=Savelli|first6=Vinno|last7=Calamandrei|first7=Duccio|last8=Maellaro|first8=Emilia|last9=Rispoli|first9=Giorgio|last10=Maioli|first10=Emanuela|last11=Valacchi|first11=Giuseppe|date=2017|title=Potassium Ascorbate with Ribose: Promising Therapeutic Approach for Melanoma Treatment|journal=Oxidative Medicine and Cellular Longevity|volume=2017|pages=4256519|doi=10.1155/2017/4256519|issn=1942-0900|pmc=5632911|pmid=29290903|doi-access=free}}{{Cite journal|last1=Anichini|first1=C.|last2=Lotti|first2=F.|last3=Longini|first3=M.|last4=Proietti|first4=F.|last5=Felici|first5=C.|last6=Perrone|first6=S.|last7=Buonocore|first7=G.|date=2012|title=Antioxidant effects of potassium ascorbate with ribose therapy in a case with Prader Willi Syndrome|journal=Disease Markers|volume=33|issue=4|pages=179–183|doi=10.3233/DMA-2012-0922|issn=1875-8630|pmc=3810693|pmid=22960339}}