High grade Phenol Red Agar Base is supplied by Micromaster. It is available in the form of a light yellow to pink homogeneous free flowing powder with a pH in the range of 7.2 to 7.6. For maximum efficiency, it must be stored below 30C in tightly closed container.

Quantity provided: 500g /pack

Phenol Red Agar Base when supplemented with carbohydrates, is well suited for the study of fermentation reactions of microorganisms. However, when it is supplemented with a specific carbohydrate, a positive carbohydrate fermentation reaction may occur, which is indicated by the production of a yellow colour in agar. To avoid this, 0.1N sodium hydroxide can be added dropwise, to restore the original colour. Phenol Red Agar Base also supports excellent growth of many fastidious bacteria. It is free from fermentable carbohydrates which could give possible erroneous interpretations. Phenol Red Agar Base can be prepared in any quantity of medium required by adding it to different portions of fermentable substances which need to be tested. Usually a final concentration of 0.5-1% of a test carbohydrate is added. Proteose peptone which is free from fermentable carbohydrates is added in the medium thereby preventing the production of false positive reactions.