Nitrogen (N2) is a colorless, odorless gas, common in many manufacturing industries. However, with long-term and uncontrolled exposure, it can seriously affect workers’ health. This article will provide a detailed explanation of the impacts of Nitrogen and how to ensure safety in the work environment.
1. What is Nitrogen?
Nitrogen, with the chemical formula N2, is a colorless, odorless, and tasteless gas, making up about 78% by mass of the Earth’s atmosphere. It belongs to the inert gas group on the periodic table, meaning it does not readily react with other substances under normal conditions. Nitrogen exists mainly as N2 molecules, meaning two Nitrogen atoms are tightly bonded together, forming a stable molecule that is difficult to break down.
The chemical properties of Nitrogen make it an ideal gas for protecting and controlling environments in many industrial applications. For example, Nitrogen is often used to create an oxygen-free environment in production or storage processes, to prevent oxidative reactions that can damage products. However, despite its many useful applications, Nitrogen can still cause serious health problems if not used or managed correctly, especially in enclosed work environments.
Nitrogen gas does not cause strong chemical reactions, but when its concentration increases in the air, it can lead to oxygen deficiency, causing danger to workers’ health. Therefore, understanding Nitrogen and its effects is crucial to ensure safety in work environments where this gas is used.
| No. | Chemical Name in Vietnamese | Chemical Name in English | HS Code | CAS Number | Chemical Formula |
| 1. | Nitơ | Nitrogen | 28043000 | 7727-37-9 | N2 |
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2. Where does Nitrogen originate from in the production process?
In the industrial production process, Nitrogen often appears from various sources, depending on the specific product type and production process. One of the main sources of Nitrogen is the direct use of this gas in production processes to create an oxygen-free environment. For instance, Nitrogen is used to protect oxygen-sensitive materials, preventing oxidative reactions that can reduce product quality.
In addition, Nitrogen can also be generated from equipment and gas supply systems in the factory. These systems often use Nitrogen gas to reduce the risk of fire and explosion and to protect equipment from corrosion. In some processes, Nitrogen is also used to cool or preserve necessary materials in production, for example, in the food or pharmaceutical industries.
Furthermore, in production processes related to chemical processing or handling, Nitrogen can be generated from chemical reactions or as a byproduct of the production process. In chemical processing plants, Nitrogen may appear as a byproduct of reactions or from systems for cooling and maintaining a stable environment.
To control and minimize the impact of Nitrogen on workers’ health, factories must apply strict management and monitoring measures to ensure the Nitrogen concentration in the air always remains at a safe level. Understanding the origin and generation of Nitrogen in the production process is an important step in building health protection policies for workers.

3. Industries that use Nitrogen in production
Nitrogen plays an important role in many production industries, thanks to its unique chemical and physical properties. In the food industry, Nitrogen is often used to preserve and cool products. For instance, in the packaging process of frozen foods, liquid Nitrogen is used to freeze products quickly, helping to maintain the quality and flavor of the food. Nitrogen is also applied in vacuum packaging processes to prevent the growth of bacteria and mold.
The pharmaceutical industry is also a field that uses Nitrogen extensively. Nitrogen is used to create an oxygen-free environment in drug storage warehouses and pharmaceutical manufacturing facilities. This helps preserve oxygen-sensitive active ingredients and maintain the effectiveness of drugs throughout their storage life. Nitrogen also plays an important role in cooling and maintaining stable environmental conditions in drug production processes.
In the electronics industry, Nitrogen is used in component and circuit board manufacturing processes. Nitrogen creates an oxygen-free environment in soldering and fabrication chambers, helping to protect components from oxidation and improve the quality of electronic products. The chemical industry also applies Nitrogen in many processes, including regulating pressure and temperature in chemical reactions, as well as in processing chemical products to prevent unwanted reactions.
In addition, Nitrogen is also used in the oil and gas industry, especially in drilling and extraction processes. In this environment, Nitrogen helps reduce pressure and improve extraction efficiency, while also protecting equipment from corrosion and damage.
4. How does Nitrogen affect workers?
Nitrogen, although an inert and non-toxic gas, can still cause serious health effects for workers when its concentration becomes high in the work environment. One of the main effects of Nitrogen is the reduction of oxygen concentration in the air. When Nitrogen dominates the air, the oxygen level can drop to dangerous levels, leading to oxygen deficiency. This can cause symptoms such as dizziness, fatigue, headache, and difficulty breathing, and in severe cases, can lead to fainting or even death if not treated promptly.
Workers in areas with high Nitrogen concentrations may also experience respiratory problems. When breathing air containing a lot of Nitrogen, the respiratory system can be affected, causing difficulty in breathing and reducing work performance. Additionally, if exposed to high concentrations of Nitrogen for a long time, workers may suffer lung damage or long-term health problems related to the respiratory system.
Another impact of Nitrogen is the change in air pressure in work environments. Nitrogen can create pressure differentials, affecting the body and causing health problems such as imbalance in the body or pressure-related issues. Workers in these environments need to pay attention to warning signs and apply appropriate protective measures.
To minimize the negative health effects of Nitrogen, factories and production facilities need to implement regular air management and monitoring measures. Equipping gas concentration measuring devices and providing effective ventilation systems is very important. At the same time, workers need to be fully trained on safety measures and how to respond to emergency situations to protect their own health.
5. Permissible safe concentration of Nitrogen for human exposure
To ensure worker safety and health, controlling Nitrogen concentration in the work environment is very important. The Nitrogen concentration in the air needs to be maintained at a level that is not harmful to health, while also ensuring sufficient oxygen for human respiration. According to international safety standards, the Nitrogen concentration in the air should not exceed 75% by volume, to ensure that the oxygen concentration remains at a level sufficient for the body to function normally.
In the work environment, if the Nitrogen concentration exceeds 60%, it can lead to oxygen deficiency, reducing work efficiency and causing health symptoms such as dizziness, fatigue, and difficulty breathing. The oxygen concentration in the air must be maintained at a minimum level of 19.5% to ensure the health and safety of workers. When the Nitrogen concentration increases, the oxygen level can drop below this safe level, leading to potential health risks.
Regulations regarding Nitrogen and oxygen concentrations may vary by country and occupational safety organization. However, the general standard is to ensure that the oxygen concentration is always at a minimum level to protect worker health. Production facilities need to implement strict control measures, including periodic measurement of gas concentrations and providing ventilation systems to maintain air quality in the work area.
At the same time, providing training to workers on safety measures and how to respond when gas concentrations are found to be non-compliant is very important. By adhering to standards and regulations on Nitrogen concentration, production facilities can protect the health of their workers and ensure a safe work environment.

At a basic level, if working in an industrial environment, adhering to safety standards and limiting exposure to Nitrogen is important. Organizations like the Occupational Safety and Health Administration (OSHA) in the United States provide guidelines and safety principles to protect workers from the negative impacts of chemicals.
6. Measures to minimize the impact of Nitrogen on worker health
To minimize the impact of Nitrogen on worker health, production facilities need to implement a series of strict protective and control measures. One of the important measures is to establish an effective ventilation system. A ventilation system helps maintain the Nitrogen concentration in the air at a safe level, while also providing sufficient oxygen for workers. Ensuring good ventilation will help remove excess Nitrogen gas and maintain fresh air.
Performing periodic gas concentration checks is also an important measure. Measurement and warning devices should be used to monitor Nitrogen and oxygen concentrations in the work environment. These devices help detect in time when the Nitrogen concentration rises above a safe level, allowing for quick adjustments or corrective actions. Installing gas sensors and automatic warning systems can significantly improve the ability to detect and respond to emergency situations.
Training workers on the risks associated with Nitrogen and how to respond in case of an emergency is an important part of the health protection strategy. Workers need to be equipped with knowledge about the symptoms of oxygen deficiency and necessary first aid measures. In addition, they also need to know how to use personal protective equipment and safety procedures when working in environments with high Nitrogen concentrations.
Providing appropriate personal protective equipment is also an indispensable measure. In some cases, the use of gas masks or personal oxygen supply systems may be necessary to protect workers from the effects of Nitrogen. Ensuring that all protective equipment is regularly inspected and maintained is crucial to ensure it functions effectively when needed.
Along with that, maintaining and updating occupational safety regulations and guidelines is very important. These regulations need to be regularly reviewed and adjusted to align with the latest safety and health standards and recommendations. By implementing these measures, production facilities can protect the health of their workers and ensure a safe, efficient work environment.
Occupational safety and health training: Workers need to be trained and educated about the risks and safety measures when working with this type of chemical. This training needs to be provided periodically and regularly to ensure understanding and proper compliance with safety rules.
Periodically organize workplace environment monitoring in factories and enterprises, collect and analyze factors harmful to workers, thereby adjusting to reduce hazard levels to prevent occupational diseases for them.
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