When using sodium nitrite, the following precautions should be taken to ensure safety:

1. Strictly follow the usage regulations: The use of sodium nitrite must be strictly in accordance with relevant regulations, standards, and operating procedures, especially in the fields of food, medicine, and laboratories.

2. Prevent excessive use: Excessive use of sodium nitrite may lead to poisoning and even endanger life. Therefore, it is necessary to strictly control the amount of use and avoid excessive addition.

3. Avoid mixing with other substances: Mixing sodium nitrite with certain substances may produce dangerous reactions, such as toxic gases when mixed with acidic substances. Therefore, it is necessary to avoid mixing with other substances during use.

4. Pay attention to storage conditions: Sodium nitrite should be stored in a dry, cool, and ventilated place, away from fire and heat sources. At the same time, it should be sealed and stored to avoid contact with moisture in the air, which can cause clumping or reduce activity.

5. Personal protection: When operating sodium nitrite, appropriate personal protective equipment should be worn, such as experimental gloves, goggles, and respirators, to prevent irritation to the skin, eyes, and respiratory tract.

6. Avoid ingestion and inhalation: Sodium nitrite is toxic and should be avoided. If accidentally touching the skin or eyes, rinse immediately with water and seek medical assistance.

7. Waste disposal: Sodium nitrite waste after use should be properly disposed of to avoid environmental pollution.

8. Monitoring and recording: When using sodium nitrite, its usage and storage conditions should be regularly monitored, and relevant records should be kept to promptly identify problems and take measures.

In short, when using sodium nitrite, it is necessary to pay attention to safety, comply with relevant regulations and operating procedures, and ensure the safety of personnel and the environment.