Dawn Scientific introducing TriStain Series. One of the most accurate and authentic in-Vitro solutions available in the market. Voges-Proskauer (VP) Solution A and B is useful to determine if an organism produces acetylmethyl carbinol from glucose fermentation Certain bacteria produce stable acid end products when cultivated in specific media. After fermentation of glucose, particular enteric bacteria metabolize pyruvic acid to acetylmethyl carbinol. This end product reacts with alphanaphthol in the presence of 40% potassium hydroxide to produce a red color complex Solution A can cause irritation. Solution B is highly basic cause burns, do not ingest, inhale, or allow to come into direct contact with skin. This product is for in vitro diagnostic use only. It is to be used only by adequately trained and qualified laboratory personnel. This is a high-quality chemical product manufactured in the United States. Discard after four weeks of opening the bottles.