Phenol Red Free Acid

CAS No

143-74-8

Synonym(s)

Phenolsulfonphthalein; Fenolipuna; Sulfonphthal

Molecular Formula:

C₁₉H₁₄O₅S

Molecular Weight:

354.38

EC Number:

205-609-7

Colour Index Number:

–

PubChem CID:

4766

MDL number:

MFCD00003552

Specification SDS

Phenol Red Free Acid CAS: 143-74-8 | MF: C19H14O5S | MW: 354.38, Buy now for accurate and Reproducible results from Tristains indicators. All Tristains products are exclusively distributed by Dawn Scientific Inc.

Phenol red free acid appears yellow or orange-yellow. Phenol red free acid is a pH indicator belonging to the phenolsulfonphthalein family. It consists of three aromatic rings with a sulfonate group and two hydroxyl groups. Phenol red free acid is sparingly soluble in water but more soluble in organic solvents like ethanol. The chemical formula for phenol red free acid is C19H14O5S. It undergoes color changes depending on the pH of the solution: red at pH 8.0 and above, yellow at pH 6.8 and below, and transitioning through orange at pH 7.4. Phenol red free acid is a chemical compound commonly used as a pH indicator in various scientific applications.

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Application :

Phenol red free acid is commonly used as a pH indicator in cell biology laboratory procedures.
In cell culture media, it is used as a pH indicator to monitor the pH of the medium.
It is sometimes used in microbiology to indicate pH changes resulting from microbial metabolic activities.