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impure samples can appear yellowish. it dissolves well in water to give mildly acidic solutions. ascorbic acid is one form ("vitamer") of vitamin c. it was originally called l-hexuronic acid, but when it was found to have vitamin c activity in animals ("vitamin c" being defined as a vitamin activity, not
glucose, many animals are able to produce it, but humans require it as part of their nutrition. other vertebrates lacking the ability to produce ascorbic acid include other primates, guinea pigs, teleost fishes, bats, and birds, all of which require it as a dietary micronutrient (that is, a vitamin). chemically...
https://www.cargohandbook.com/Ascorbic_Acid