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Phenolphthalein Indication Solution

The phenolphthalein indicator solution is primarily used in chemistry and biochemistry to determine the pH value in various solutions. It is particularly suitable for titration procedures in which the neutralization reactions of acids and bases are investigated. The solution consists of phenolphthalein dissolved in a mixture of ethanol and aqua bidest / ultrapure water. Phenolphthalein is a pH indicator that is colorless in acidic medium and pink in alkaline medium. It shows a color change between pH 8.2 (colorless) and pH 10 (pink). The chemical reaction that causes this color change is the de- and re- protonation of phenolphthalein depending on the pH of the solution. The function of the indicator solution is based on this ability to serve as a visual indicator of pH, making it an indispensable tool in various scientific and industrial applications. In addition, phenolphthalein can find application in biomedical research, for example in the determination of acid-base balance in biological samples.

Article no.: 14297

pH detection by color change (indicator solution)

  •   Container size and order number Net price Amount
    Phenolphthalein Indication Solution - 20 ml
    Order number: 14297.00020
    13,93 €
    Phenolphthalein Indication Solution - 100 ml
    Order number: 14297.00100
    22,25 €
    Phenolphthalein Indication Solution - 250 ml
    Order number: 14297.00250
    29,36 €
    Phenolphthalein Indication Solution - 500 ml
    Order number: 14297.00500
    55,30 €
    Phenolphthalein Indication Solution - 1.000 ml
    Order number: 14297.01000
    114,90 €

Important Information

UN-Nummer: 1170

Warning labels:

Lagerung: 15 … 25 °C

Haltbarkeit: 6 Monate

safety data sheet

product information

Relevant Incredients:
• Ethanol
• 3,3-bis-(4-hydroxy-phenyl)-3H-isobenzofuran-1-one

Technical informations


Hazard and safety instructions

Signal Word 1: Gefahr
Signal Word 2: flamme, , ,
Warning labels: