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Niacin, USP (Nicotinic Acid) (Dietary Supplement Grade) comes as white crystals or a white crystalline powder. If using for sterile preparation, ensure further processing and testing.
Folic Acid, USP (Dietary Supplement Grade) is an odorless, crystalline powder that can vary between yellow, yellow-brownish, or yellowish orange in color.
Nystatin USP / EP is a yellow to light tan powder, with characteristic odor. It is hygroscopic, and is affected by long exposure to light, heat, and air.