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Ascorbic acid is a weak sugar acid structurally related to glucose. In biological systems, ascorbic acid can be found only at low pH, but in solutions above pH 5 is predominantly found in the ionized form, ascorbate. [8] Numerous analytical methods have been developed for ascorbic acid detection.
Ascorbic acid is easily oxidized and so is used as a reductant in photographic developer solutions (among others) and as a preservative. [citation needed] In fluorescence microscopy and related fluorescence-based techniques, ascorbic acid can be used as an antioxidant to increase fluorescent signal and chemically retard dye photobleaching. [14]
The pH scale is by far the most commonly used acidity function, and is ideal for dilute aqueous solutions. Other acidity functions have been proposed for different environments, most notably the Hammett acidity function , H 0 , [ 3 ] for superacid media and its modified version H − for superbasic media.
As the sodium salt of ascorbic acid, it is known as a mineral ascorbate. It has not been demonstrated to be more bioavailable than any other form of vitamin C supplement. [2] Sodium ascorbate normally provides 131 mg of sodium per 1,000 mg of ascorbic acid (1,000 mg of sodium ascorbate contains 889 mg of ascorbic acid and 111 mg of sodium).
Acid Description Formulation pKa (when applicable, pKa1) Acetic acid: Gives vinegar its sour taste and distinctive smell. C 2 H 4 O 2: 4.756 Ascorbic acid: Found in oranges and green peppers and gives a crisp, slightly sour taste, better known as vitamin C. C 6 H 8 O 6: 4.10 Citric acid: Found in citrus fruits and gives them their sour taste. C ...
Redoxon is the brand name of the first artificially synthesized ascorbic acid . [1] Redoxon was first marketed to the general public by Roche in 1934, making it the first mass-manufactured synthetic vitamin in history. [2] The brand is now owned by German pharmaceutical company Bayer and is sold in many countries. [quantify]
The Reichstein process in chemistry is a combined chemical and microbial method for the production of ascorbic acid from D-glucose that takes place in several steps. [1] This process was devised by Nobel Prize winner Tadeusz Reichstein and his colleagues in 1933 while working in the laboratory of the ETH in Zürich.
It is the potassium salt of ascorbic acid 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, [ 2 ] [ 3 ] it is approved for use in Australia and New Zealand. [ 4 ]
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