Editing Chemistry of ascorbic acid (section)

===Niche, non-food uses===

* Ascorbic acid is easily oxidized and so is used as a reductant in photographic developer solutions (among others) and as a [[preservative]].{{Citation needed|date=July 2024}}
* In [[fluorescence microscope|fluorescence microscopy]] and related fluorescence-based techniques, ascorbic acid can be used as an [[antioxidant]] to increase fluorescent signal and chemically retard dye [[photobleaching]].<ref>{{cite journal | vauthors = Widengren J, Chmyrov A, Eggeling C, Löfdahl PA, Seidel CA | title = Strategies to improve photostabilities in ultrasensitive fluorescence spectroscopy | journal = The Journal of Physical Chemistry A | volume = 111 | issue = 3 | pages = 429–40 | date = January 2007 | pmid = 17228891 | doi = 10.1021/jp0646325 | bibcode = 2007JPCA..111..429W }}</ref>
* It is also commonly used to remove dissolved metal stains, such as iron, from fiberglass swimming pool surfaces.{{Citation needed|date=July 2024}}
* In plastic manufacturing, ascorbic acid can be used to assemble molecular chains more quickly and with less waste than traditional synthesis methods.<ref>{{citation |title=Vitamin C, water have benefits for plastic manufacturing |url=http://reliableplant.com/article.asp?pagetitle=Vitamin%20C,%20water%20have%20benefits%20for%20plastic%20manufacturing&articleid=3133 |publisher=Reliable Plant Magazine |year=2007 |access-date=2007-06-25 |archive-url=https://web.archive.org/web/20070927230356/http://www.reliableplant.com/article.asp?pagetitle=Vitamin+C%2C+water+have+benefits+for+plastic+manufacturing&articleid=3133 |archive-date=2007-09-27 |url-status = dead}}</ref>
* Heroin users are known to use ascorbic acid as a means to convert heroin base to a water-soluble salt so that it can be injected.<ref>{{cite journal | vauthors = Beynon CM, McVeigh J, Chandler M, Wareing M, Bellis MA | title = The impact of citrate introduction at UK syringe exchange programmes: a retrospective cohort study in Cheshire and Merseyside, UK | journal = Harm Reduction Journal | volume = 4 | issue = 1 | pages = 21 | date = December 2007 | pmid = 18072971 | pmc = 2245922 | doi = 10.1186/1477-7517-4-21 | doi-access = free }}</ref>
* As justified by its reaction with iodine, it is used to negate the effects of iodine tablets in water purification. It reacts with the sterilized water, removing the taste, color, and smell of the iodine. This is why it is often sold as a second set of tablets in most sporting goods stores as Potable Aqua-Neutralizing Tablets, along with the potassium iodide tablets.{{Citation needed|date=July 2024}}
*[[Intravenous therapy|Intravenous]] high-dose ascorbate is being used as a [[Chemotherapy|chemotherapeutic]] and [[Biological response modifiers|biological response modifying agent]].<ref>{{cite web |title=The Riordan IVC Protocol for Adjunctive Cancer Care: Intravenous Ascorbate as a Chemotherapeutic and Biological Response Modifying Agent|url=http://www.doctoryourself.com/RiordanIVC.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.doctoryourself.com/RiordanIVC.pdf |archive-date=2022-10-09 |url-status=live|publisher=Riordan Clinic Research Institut|access-date=2 February 2014|date=February 2013}}</ref> It is undergoing clinical trials.<ref>{{cite web |title=High-Dose Vitamin C (PDQ): Human/Clinical Studies|url=http://www.cancer.gov/cancertopics/pdq/cam/highdosevitaminc/healthprofessional/page5|publisher=National Cancer Institute|access-date=2 February 2014|date=2013-02-08}}</ref>
* It is sometimes used as a urinary acidifier to enhance the antiseptic effect of [[methenamine]].<ref>{{cite journal|doi=10.1002/bdd.2510140106|title=Effect of urine pH and ascorbic acid on the rate of conversion of methenamine to formaldehyde|year=1993|last1=Strom|first1=J. Grady|last2=Jun|first2=H. Won|journal=Biopharmaceutics & Drug Disposition|volume=14|issue=1|pages=61–69|pmid=8427945|s2cid=11151179}}</ref><ref>{{cite journal|doi=10.1007/bf00545228|title=Effect of urinary acidifiers on formaldehyde concentration and efficacy with methenamine therapy|year=1982|last1=Nahata|first1=M. C.|last2=Cummins|first2=B. A.|last3=McLeod|first3=D. C.|last4=Schondelmeyer|first4=S. W.|last5=Butler|first5=R.|journal=European Journal of Clinical Pharmacology|volume=22|issue=3|pages=281–284|pmid=7106162|s2cid=31796137}}</ref><ref>{{cite news |last1=Murphy |first1=Francis J. |last2=Zelman |first2=Samuel |title=Ascorbic Acid as a Urinary Acidifying Agent: 1. Comparison with the Ketogenic Effect of Fasting |url=https://www.auajournals.org/doi/abs/10.1016/S0022-5347%2817%2963619-X#:~:text=were%20determined%20incidentally.-,In%20doses%20of%200.5%20gm.,cal%2D%20cium%20in%20acid%20urine. |work=The Journal of Urology |date=September 1965 |language=EN |doi=10.1016/S0022-5347(17)63619-X}}</ref>