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[Chemical Knowledge]：Correct use and precautions of cresol red indicator

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Cresol red, also known as methyl red or methyl azo phenol red, is a commonly used indicator and has a wide range of applications in chemical laboratories and industrial production. It is often used as an end point indicator for acid-base neutralization reactions, and the pH of the solution can be determined by the change of color. However, when using cresol red indicator, some matters need to be paid attention to to ensure the use effect and personal safety. The following is about the correct use of cresol red indicator and precautions:

1. check before use: before using cresol red indicator, you need to check whether its appearance is normal and whether there are foreign bodies mixed in. If an abnormality is found, it should be discontinued immediately.

2. preservation method: cresol red indicator should be stored in a cool, dry, ventilated place, avoid direct sunlight and high temperature. The bottle cap should be sealed when storing to prevent moisture and dust pollution.

3. Avoid mixed use: Cresol red indicator should be avoided to be mixed with other chemicals during use to avoid dangerous situations.

4. Usage control: When using cresol red indicator in the experiment, the usage should be controlled according to the specific experimental requirements to avoid waste and excessive use.

5. Pay attention to safety: When using cresol red indicator, you should pay attention to personal protection to avoid direct contact with the skin and inhalation of its odor. During the operation, gloves, masks and goggles should be worn to ensure safety.

6. Disposal of waste: after the use of cresol red indicator bottles and waste liquid should be in accordance with the relevant provisions of the correct disposal, can not be discarded.

the correct use of cresol red indicator needs to be strictly in accordance with the instructions and experimental procedures for operation, be careful to ensure safety. I hope that the precautions introduced in this article can help you to better use the cresol red indicator and avoid unnecessary risks and losses.

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