Chlorfenvinphos (C12H14Cl3O4P) is a toxic chemical commonly used in industry. This article will provide a detailed analysis of how Chlorfenvinphos affects workers’ health, from the risk of acute poisoning to long-term impacts, helping you better understand how to protect your health in the workplace.
1. What is Chlorfenvinphos?
Chlorfenvinphos is a chemical compound with the molecular formula C12H14Cl3O4P, belonging to the organophosphate chemical group. It is a pesticide commonly used in agriculture and industry to control various harmful insects, especially pests on crops and parasites on animals.
Regarding its chemical structure, Chlorfenvinphos consists of main components such as carbon (C), hydrogen (H), chlorine (Cl), oxygen (O), and phosphorus (P), which create its characteristic chemical properties. This compound usually exists as a liquid or crystalline solid, is not very soluble in water but dissolves easily in organic solvents. This allows it to easily penetrate the bodies of insects, destroying their nervous systems and causing death.
Besides its main role in pest control, Chlorfenvinphos also poses a risk to human health if exposed to high levels. Therefore, a clear understanding of the chemical properties and applications of this compound is an important step to ensure safety during its production and use.
| No. | Chemical Name in Vietnamese | Chemical Name in English | HS Code | CAS Number | Chemical Formula |
| 1. | Clo fenvinphos | Chlorfenvinphos | 29199000 | 470-90-6 | C12H14Cl3O4P |
See more: Chemical safety training according to Decree 113/2017/ND-CP
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2. Where does Chlorfenvinphos originate from during production?
During the production process, this compound is typically synthesized from basic chemical raw materials through complex chemical reactions. Chemical manufacturing plants often use derivatives of chlorine, phosphorus, and other organic compounds as the main raw materials. This process involves multiple stages, from initial processing and synthesis reactions to the purification of the final product.
The primary source of this compound is usually pesticide and plant protection chemical manufacturing facilities. Here, chemical reactions are strictly controlled to create a product that meets the standards for effective use in agriculture. Additionally, by-products or emissions from the production process may also contain small amounts of this compound, especially when the production process is not optimized or the equipment does not meet safety standards.
Furthermore, generation can also occur during storage and transportation when containers or packaging leak, causing it to be released into the surrounding environment. This emphasizes the need for strict control measures to minimize the negative impacts from its source during the production process.

3. Industries that use Chlorfenvinphos in production
Industries that use Chlorfenvinphos are often concentrated in fields related to agriculture and pest control. In agriculture, this chemical is widely used in the production of plant protection products to control pests that harm crops, especially in grains, fruits, vegetables, and industrial crops. Farms commonly apply it to minimize damage caused by insects, thereby increasing productivity and product quality.
In addition, in the livestock sector, Chlorfenvinphos is used to address issues related to parasites on animals such as ticks, fleas, and lice. Livestock and poultry farms often use this chemical in the form of solutions or sprays to protect their animals from parasitic insects, helping to reduce the risk of disease transmission within the herd.
The food preservation sector also utilizes Chlorfenvinphos, primarily to protect grain storage facilities and agricultural products from insect attacks. This chemical is often used as a surface treatment or fumigant to ensure that food is stored in a safe environment and is not contaminated by pests.
Finally, some chemical and pharmaceutical manufacturing industries may also use Chlorfenvinphos as an ingredient in specialized products.
4. How does Chlorfenvinphos affect workers?
Workers exposed to Chlorfenvinphos can suffer direct health effects, especially in industries related to the production, use, or handling of this chemical. When exposed through the skin, inhalation of vapor, or ingestion, this chemical can cause acute poisoning with symptoms such as nausea, headache, dizziness, difficulty breathing, and excessive sweating. These effects occur because Chlorfenvinphos affects the nervous system by inhibiting the enzyme cholinesterase, disrupting nerve signal transmission in the body.
In the long term, frequent or improperly protected exposure can lead to more serious health problems, including damage to the central nervous system and behavioral disorders. Workers in these environments are at high risk of memory impairment, reduced concentration, and other neurological symptoms like seizures or tremors. In particular, cases of long-term exposure without timely examination and treatment can lead to irreversible damage.
Furthermore, this chemical can also cause skin, eye, and respiratory irritation if appropriate protective equipment is not used. Blisters, dermatitis, or red eyes often appear in workers who have direct contact with the chemical without protective measures. The respiratory system is also vulnerable, causing persistent coughing or pneumonia when workers inhale Chlorfenvinphos dust or vapor at high concentrations.
These effects are not only limited to individuals but also risk affecting the general working environment, especially in poorly ventilated areas or where effective occupational safety measures are lacking. Handling the chemical without following proper procedures can lead to the risk of its dispersal into the air or onto surfaces, thereby increasing the potential for exposure to surrounding workers.
5. Permissible safe concentration of Chlorfenvinphos for human exposure
The safe concentration of Chlorfenvinphos for human exposure is determined based on international and national standards, aiming to ensure health and minimize exposure risks. According to occupational safety organizations, the Threshold Limit Value (TLV) for Chlorfenvinphos is typically set at a very low level, reflecting the toxicity of this compound. Specifically, the Time-Weighted Average (TWA) limit is generally not to exceed 0.5 mg/m³ of air over an 8-hour workday, 5 days a week.
This limit is applied to ensure that workers exposed to the chemical will not experience adverse health effects, especially symptoms related to neurotoxicity or respiratory disorders. This concentration is established based on toxicity studies, animal testing, and assessments of its impact on humans in actual work environments.
In addition, for short-term exposure to higher concentrations, regulations also establish a Short-Term Exposure Limit (STEL), which usually does not exceed 1.5 mg/m³ for a maximum period of 15 minutes. This is intended to control unexpected exposure situations, helping to prevent serious impacts on the nervous system and overall health.
Besides air concentration limits, safety standards also specify the Maximum Residue Limit (MRL) of Chlorfenvinphos in food and drinking water to ensure consumer safety. These values are typically very small, often measured in micrograms per kilogram (µg/kg), to minimize the risk of indirect exposure through contaminated food or water.

On a basic level, if working in an industrial environment, it is important to adhere to safety standards and limit exposure to Chlorfenvinphos. 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 health effects of Chlorfenvinphos on workers
To minimize the health effects of Chlorfenvinphos on workers, applying preventive and protective measures is essential. First and foremost, workers must be provided with adequate personal protective equipment such as gloves, safety glasses, chemical-resistant masks, and full-body protective clothing. This equipment helps prevent the chemical from coming into direct contact with the skin, eyes, and respiratory tract, reducing the risk of absorption into the body.
Training and raising awareness among workers is another crucial factor in mitigating the impact of this chemical. Workers need detailed instructions on how to use the chemical safely, a clear understanding of the risks of exposure, and knowledge of how to respond in case of an incident. Regular training courses also help ensure that all employees consistently follow proper work procedures and use protective equipment correctly.
Ventilation systems and control of the work environment also play a vital role in protecting workers’ health. Production facilities and storage areas need to be equipped with good ventilation systems to help reduce the concentration of chemical vapors in the air. Installing local exhaust ventilation and air filtration devices also helps prevent the spread of Chlorfenvinphos into the surrounding environment.
Regular health check-ups are an essential measure to detect early signs of poisoning or damage caused by the chemical. Workers in high-risk environments need to have their nervous system function and biological indicators related to chemical exposure monitored. This not only helps protect individual health but also contributes to reducing the risk of impacting the entire workforce.
Finally, using less toxic alternative methods and products is also a long-term measure to protect workers. Businesses can invest in research and development of safer pest control or plant protection solutions, thereby reducing reliance on toxic chemicals like Chlorfenvinphos.
Occupational safety training: Workers need to be trained and educated on the risks and safety measures when working with this type of chemical. This training should be provided periodically and regularly to ensure understanding and proper adherence to safety rules.
Periodically organize occupational environment monitoring in factories and enterprises, collecting and analyzing factors harmful to workers, thereby adjusting to reduce the hazard level to prevent occupational diseases for them.
7. National Occupational Environment Monitoring Center
The occupational environment monitoring center of Nam Viet is a professional unit specializing in monitoring and measuring the quality of the working environment across all provinces in Vietnam. With a team of experienced monitoring specialists, the center uses modern measuring equipment, ensuring accuracy and reliability.
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In addition to providing monitoring services, the center also supports clients in planning, handling, and tracking occupational environment issues. With the motto “the customer is the center”, the center cares about customer satisfaction, meets all customer needs, and is committed to providing the best solutions for businesses.
With investment in techniques, technology, and human resources, the Nam Viet monitoring center has been and is becoming one of the reputable units in the field of occupational 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 options possible.
- Along with a team of experienced Masters and Engineers with a desire to protect the environment and benefit businesses.

- With the Nam Viet Environmental Monitoring team, your company will receive professional service from experts in the monitoring field. At the same time, you will get the best cost incentives.
8. Quotation for occupational environment monitoring
To help businesses carry out occupational environment monitoring professionally and effectively, we at Nam Viet provide our valued customers with a quality and reasonably priced quotation table for occupational environment monitoring services.
- Our quotation table provides detailed information on 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 are committed to always offering the most competitive and reasonable prices on the market, and we are also always ready to provide consultation and answer any questions about our monitoring services quickly and professionally.
- With Nam Viet’s quotation table, customers can easily choose service packages that suit their needs. We are committed to bringing our customers the highest satisfaction with our professional quality service.

