Phenol Red sodium salt Chemical Properties

Melting point:

285 °C (dec.)(lit.)

Boiling point:

285 °C

Density 

0.972

storage temp. 

room temp

solubility 

H₂O: clarity passes test

pka

7.69, 7.9, 1.3(at 25℃)

form 

Shiny Powder

color 

White

PH Range

Yellow (6.8) to red (8.4)

Odor

Odorless

Water Solubility 

soluble

λmax

423nm, 557nm

Merck 

14,7247

BRN 

6260026

Stability:

Stable. Incompatible with strong oxidizing agents.

Major Application

Sensor, optical device, paints, sterilization process, fertilizer, detecting viable cells, gastrointestinal mucosa, antibacterial agent, drugs, pharmacology

CAS DataBase Reference

34487-61-1(CAS DataBase Reference)

EPA Substance Registry System

Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-, monosodium salt (34487-61-1)

Safety Information

Hazard Codes 

Xi,C

Risk Statements 

36/37/38-34

Safety Statements 

26-36-37/39-45-36/37/39-27

WGK Germany 

3

TSCA 

Yes

HS Code 

29349990

MSDS

• Language:English Provider:Phenolsulfonephthalein sodium salt
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Phenol Red sodium salt Usage And Synthesis

Chemical Properties

red liquid or red/brown crystals, slightly soluble in water, alcohol and acetone. Almost insoluble in ether and chloroform, soluble in hydroxide base or carbonate base solution with deep red color, stable in air, used as acid-base indicator.

Uses

Phenol Red Sodium Salt is a water soluble pH indicator commonly employed in cell biology laboratories as a cell tissue culture pH marker. Phenol Red sodium salt is a water soluble pH indicator used in the 6.8 (yellow) to 8.2 (red) range. It is commonly employed in cell biology laboratories as a cell tissue culture pH marker. Under normal conditions, phenol red added to the growth medium will have a pink-red color. Usually 15 mg/l is used to produce this effect. If problems arise, such as dying cells or overgrowth of contaminants, this will cause a change in pH resulting in a change in indicator color. This color change is an indication that the medium needs to be replaced. Additionally, Phenol Red could potentially be useful as a differentiation factor. It can also be used as reactant/reag

Uses

Phenol Red sodium salt has been used as an indicator during single-guide RNA microinjection into one-cell stage zebrafish embryos.

Uses

Phenol Red has been used for preparation of phosphate buffer saline (PBS)-with phenol red for microfluidic assay for simultaneous culture of multiple cell types. It has also been used for horseradish peroxidase-phenol red (HRP-PR) H₂O₂ (hydrogen peroxide) detection assay to identify redox cycling compounds.

General Description

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6.4 and below, phenol red solution will have a yellow color. At a pH of 8.2 and above, it will have a red color. It is commonly used in culture media to detect neutral to acidic pH changes.

Biochem/physiol Actions

Phenol Red is a pH indicator which changes color from yellow to red.

Phenol Red sodium salt(34487-61-1)Related Product Information

• Sodium bicarbonate
• Sodium chloride
• Sodium acetate
• Phenol
• Phenol Red
• 2-Phenylphenol
• PYROGALLOL RED
• Sodium hydroxide
• Sodium benzoate
• Diclofenac sodium
• Sodium citrate
• Bromophenol Red
• Sodium benzenolate
• Trisodium phosphate
• 4-Aminophenol
• 3-Aminophenol
• Chlorophyllin
• 8-CHLOROADENOSINE-3',5'-CYCLIC MONOPHOSPHOROTHIOATE, RP-ISOMER SODIUM SALT