This article will discuss the impact of Selenic acid on the health of workers. Selenic acid, a compound containing selenium in chemistry, is often used in many industries. However, the amount and exposure to this substance can significantly affect the health of those working in environments containing Selenic acid. This article will analyze the risks, symptoms, and health protection measures that workers may encounter when exposed to Selenic acid, while also highlighting the importance of maintaining a safe work environment and protecting the health of the labor community.
1. What is Selenic acid?
Selenic acid is an acid form of selenium (Se) and has the formula H2SeO4. It is a substance that can be formed from selenium or its compounds under strong oxidizing conditions. Selenic acid can exist as a solution in water.
Selenic acid is not a common substance in practice, and it is often studied and used in some special chemical applications. Depending on its use and exposure, it can have a significant impact on the health and safety of workers.
| No. | Chemical name in Vietnamese | Chemical name in English | HS Code | CAS Number | Chemical Formula |
| 1. | Axit selenic | Selenic acid | 28111990 | 7783-06-6 | H2SeO4 |
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2. Where does Selenic acid originate from in the production process?
Selenic acid (H2SeO4) is typically produced through chemical reactions involving selenium. One of the most common methods is the oxidation of selenium or selenite (SeO3^2-) in a sulfuric acid (H2SO4) environment. Below is a representative equation:
In this reaction, selenium (Se) is oxidized to selenic acid (H2SeO4), while sulfuric acid (H2SO4) also participates in the process.
This process is usually carried out under controlled and safe conditions to prevent leaks and make the production process safe and efficient. In addition, strict control of the production process is also important to minimize negative impacts on the environment and the health of people working in this industry.

3. Industries that use Selenic acid in production
Selenic acid (H2SeO4) is not a common substance in many industries and is often used in special chemical applications. Here are some industries where selenic acid might be used:
- Plating and Metal Processing Industry: Selenic acid may be used in metal plating processes, especially to create anti-corrosion and anti-oxidation coatings on metal surfaces.
- Electronics Manufacturing Industry: In some cases, selenic acid may be used in the production and manufacturing of electronic components.
- Chemical Manufacturing Industry: Selenic acid is a selenium compound that can be used in special chemical reactions, such as a strong oxidizing agent in chemical synthesis processes.
- Research and Development: Selenic acid may be used in research and development laboratories to study the properties and applications of selenium in chemical and medical applications.
4. How does Selenic acid affect workers?
Selenic acid (H2SeO4) can significantly affect the health of workers if they are exposed to it without ensuring safety measures. Here are some negative impacts that selenic acid can cause:
- Toxicity: Selenic acid contains selenium, a toxic metal if absorbed into the body in high doses. Exposure to selenic acid can lead to the risk of selenium poisoning, causing health problems such as headaches, nausea, fatigue, and in more severe cases, can cause damage to internal organs.
- Skin and Eye Impact: Direct contact with selenic acid can cause irritation and damage to the skin and eyes. It can cause burning, redness, and if not treated promptly, can lead to more serious problems.
- Respiratory Risk: If vapors or particles of selenic acid are inhaled, it can cause problems for the respiratory system, causing difficulty breathing, rhinitis, or even affecting the lungs.
- Safety Risk: If safety measures are not properly followed when working with selenic acid, the risk of occupational accidents also increases, including the risk of explosion, fire, or leaks.
To minimize risks and ensure safety for workers, it is necessary to establish and strictly adhere to safety measures, including the use of personal protective equipment, closed and ventilated work processes, as well as adequate training on occupational safety.
5. Permissible safe concentration of Selenic acid for human exposure
The permissible safe concentration of selenic acid for human exposure depends on many factors, including exposure time, route of exposure (skin, inhalation, eyes), and working conditions. However, determining a precise concentration threshold can be challenging, as each person has different sensitivity to toxic substances.
At high levels, selenic acid can be toxic and harmful to health. International organizations and agencies, such as the World Health Organization (WHO) and the US Environmental Protection Agency (EPA), often set safety thresholds for selenium in drinking water and the environment as a measure to protect human health.
At a basic level, if working in an industrial environment, adhering to safety standards and limiting exposure to Selenic acid 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 chemical substances.

6. Measures to minimize the impact of Selenic acid on worker health
To minimize the impact of selenic acid on worker health, it is necessary to implement safety measures and risk controls. Here are some measures that can be taken:
- Use Personal Protective Equipment (PPE):
- Wear safety glasses and respirators to protect eyes and respiratory tract from direct contact with selenic acid.
- Use protective clothing, gloves, and safety shoes to prevent direct skin contact.
- Safe Work Procedures:
- Ensure that work procedures are designed to minimize exposure to selenic acid.
- Use vacuum extraction equipment or effective ventilation systems to control selenic acid vapors and dust.
- Occupational safety training:
- Provide adequate training on occupational safety, especially on how to handle and store selenic acid.
- Instruct workers on safety rules and necessary first aid measures.
- Risk Control and Monitoring:
- Conduct regular risk assessments to ensure control measures are working effectively.
- Monitor selenic acid concentrations in the work environment to ensure they are within safe limits.
- Work Under Expert Guidance:
- For particularly hazardous jobs, ensure that workers have the support and supervision of an expert or experienced person.
- Precautions for Material Handling:
- Handle materials containing selenic acid in areas specifically designed to prevent leaks and unwanted exposure.
Periodically organize work environment monitoring in factories and enterprises, collecting and analyzing factors harmful to workers, thereby adjusting to reduce hazard levels to prevent occupational diseases for them.
7. Nationwide work environment monitoring center
Nam Viet’s work environment monitoring center is a professional unit specializing in monitoring and measuring the quality of the work environment across all provinces in Vietnam. With a team of experienced monitoring specialists, the center uses modern measuring equipment, ensuring accuracy and reliability.
REGISTER FOR WORK ENVIRONMENT MONITORING SERVICE
In addition to providing monitoring services, the center also supports clients in planning, handling, and tracking work environment issues. With the motto “customer is the center,” the center cares about customer satisfaction, meets all customer needs, and commits to providing the best solutions for businesses.
With investment in techniques, technology, and human resources, Nam Viet’s monitoring center has been and is becoming one of the reputable units in the field of work environment monitoring in Ho Chi Minh City with the following objectives:
- We always value our brand reputation and the quality of our products and services.
- We provide our customers with the best and most suitable things possible.
- Along with a team of experienced Masters and Engineers with expertise, we desire to protect the environment and benefit businesses.

- Coming to Nam Viet’s Environmental Monitoring team, your company will receive professional service with experts in the field of monitoring. At the same time, you will get the best cost incentives.
8. Work environment monitoring quotation
To help businesses conduct work environment monitoring professionally and effectively, Nam Viet provides customers with a quality and reasonably priced quotation for work environment monitoring services.
- Our monitoring quotation provides detailed information about the prices of the monitoring services we offer. This includes costs related to travel, measurement, analysis, and reporting of results. Customers can be completely assured of the accuracy and reliability of the monitoring result reports we provide.
- We commit to always offering the most competitive and reasonable prices on the market, and we are also always ready to advise and answer any questions about monitoring services quickly and professionally.
- With Nam Viet’s monitoring quotation, customers can easily choose service packages that suit their needs. We commit to bringing our customers the highest satisfaction with professional service quality.

