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[Chemical Knowledge]：The magic of phenolphthalein: understand its efficacy and use method

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Phenolphthalein is a commonly used chemical reagent and an important indicator, which is widely used in chemical analysis and biological research. The chemical formula of phenolphthalein is C19H14O5S and the molecular weight is 354.38. It presents itself as colorless crystals, but its sodium salt has a light pink color. The color of phenolphthalein will change from colorless to red, showing different colors under different pH conditions.

In the field of biology, phenolphthalein is used to detect the presence of DNA. When DNA is present, the color change of sodium phenolphthalein is very significant, and the presence of DNA can be detected by fluorescence or absorption spectroscopy. In biochemical chemistry, sodium phenolphthalein is often used as a protein detection reagent. Sodium phenolphthalein can bind to proteins and exhibit different colors under acidic or alkaline conditions.

In the pharmaceutical field, sodium phenolphthalein can be used to confirm the accuracy of certain drug ingredients and drug dosages and to monitor whether they have achieved the desired effect.

In the field of environmental protection and water treatment, phenolphthalein is widely used. Sodium phenolphthalein can be used to detect the concentration of heavy metal ions in water sources. It can be combined with copper, iron, zinc and other metal ions to measure their concentration. Phenolphthalein can also be used to measure the concentration of heavy oxygen ions in water sources, which can help us better understand the quality of water bodies.

use phenolphthalein have some precautions, let's introduce:

1. phenolphthalein generally as a solid, can be stored for a long time, but in contact with air and moisture, easy to deteriorate.
2. When using phenolphthalein, you must pay attention to safety, avoid direct contact with human body and avoid being swallowed.
3. When using phenolphthalein, pay attention to accurate weighing, configuration and preservation.
Phenolphthalein
is a very important chemical reagent and indicator, which has a wide range of applications, such as biology, biochemistry, pharmacy, environmental protection and water treatment. The use of phenolphthalein requires strict professionalism and reliable data results in order to better serve our lives and work.

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