| http://www.w3.org/ns/prov#value | - Ascorbic acid, also known as vitamin C, is a readily available GRAS (generally recognized as safe) substance often used in pharmaceutical compositions and other formulations used for biological purposes and may be used at levels as high as 10mg/ml of the final formulation but the lowest effective concentration, generally in the range of 0.9-1.3 mg/ml, is preferred.
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