Cresol Red Free acid

CAS No

1733-12-6

Synonym(s)

o-Cresolsulfonphthalein

Molecular Formula:

C₂₁H₁₈O₅S

Molecular Weight:

382.43

EC Number:

217-064-2

Colour Index Number:

–

PubChem CID:

73013

MDL number:

MFCD00005878

Specification SDS

Cresol Red Free acid CAS: 1733-12-6 | MF: C21H18O5S | MW: 382.43, Buy now for accurate and Reproducible results from Tristains indicators. All Tristains products are exclusively distributed by Dawn Scientific Inc.

Cresol Red, also known as Cresolsulfonphthalein, is a triphenylmethane dye. Its chemical structure consists of three phenolic groups and a sulfonated phthalide ring. Cresol Red exists in several forms, including the free acid form and the sodium salt form. The free acid form is often used in laboratory settings. In acidic solutions, Cresol Red appears yellow, while in alkaline solutions, it turns red. The transition pH range for Cresol Red is approximately 7.2 to 8.8. Its chemical formula is C21H18O5S. Cresol Red is another commonly used pH indicator, particularly in biochemical and biological applications.

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Application :

Cresol Red free acid is primarily used as a pH indicator.
It is commonly employed in various biochemical and biological assays where pH monitoring is essential. This includes cell culture media preparation, enzyme kinetics studies, and protein purification processes.
It’s often used in titrations and in the preparation of buffer solutions due to its ability to accurately indicate pH changes within a specific range.