Ethyl mercaptan (Ethanethiol) is a chemical commonly used in manufacturing plants, but few people know that it can seriously affect the health of workers. This article will help you understand the effects of ethyl mercaptan and how to protect your health when working in an environment containing this chemical.
1. What is Ethyl mercaptan (Ethanethiol)?
Ethyl mercaptan (Ethanethiol), with the chemical formula C2H6S, is an organic compound belonging to the mercaptan group, also known as thiol. It is a colorless liquid with a characteristic odor similar to onions or garlic, often used to indicate the presence of natural gas, helping people easily detect gas leaks in the air.
Regarding its chemical structure, ethyl mercaptan has two main functional groups: an ethyl group (-C2H5) attached to a sulfur atom (S) through a single bond. The characteristic of the thiol group (-SH) gives this substance its special properties, as it readily reacts with other compounds and can cause an unpleasant odor even at very low concentrations. The chemical formula C2H6S shows that each molecule of ethyl mercaptan consists of two carbon atoms, six hydrogen atoms, and one sulfur atom.
Ethyl mercaptan can easily dissolve in water and organic solvents, and it also evaporates quickly in the air. Due to these properties, it is often used in the chemical and oil and gas industries, and as an additive in consumer products. However, despite its many industrial applications, ethyl mercaptan must be used with caution due to its toxicity to human health.
| No. | Chemical Name in Vietnamese | Chemical Name in English | HS Code | CAS Number | Chemical Formula |
| 1. | Etyl mercaptan | Ethyl mercaptan (Ethanethiol) | 29309090 | 75-08-1 | C2H6S |
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2. Where does Ethyl mercaptan (Ethanethiol) originate from in the production process?
During the production process, ethyl mercaptan is primarily generated from chemical reactions between ethene (a type of olefin) and hydrogen sulfide (H2S) in the presence of a catalyst. This reaction typically occurs in chemical plants, especially in the oil and gas industry. Ethene, a compound readily available from the distillation of crude oil, combines with hydrogen sulfide to form ethyl mercaptan.
Additionally, ethyl mercaptan can also be produced during the processing of natural gas or in reactions to produce sulfur-containing compounds. In gas production plants, when hydrogen sulfide is treated or removed, byproducts like ethyl mercaptan can sometimes form due to uncontrolled side chemical reactions.
The reactions to produce ethyl mercaptan usually occur under specific temperature and pressure conditions, and strict control of these factors is crucial to prevent the excessive generation of this compound in the production environment.

3. Industries that use Ethyl mercaptan (Ethanethiol) in production
Ethyl mercaptan is widely used in several industries, particularly in fields related to gas and chemical production. In the oil and gas industry, this compound is mainly used as an odorant in natural gas. Because natural gas is naturally odorless, adding ethyl mercaptan helps users easily detect gas leaks, thereby reducing the risk of accidents.
Furthermore, ethyl mercaptan is also used in the chemical manufacturing industry, where it serves as a raw material in the synthesis of some other organic compounds. This compound is also used in the industry of manufacturing fragrances for consumer products such as perfumes, soaps, and other household items. Besides, ethyl mercaptan also appears in the production process of polymers and plastics, where it is used as an additive to improve the properties of the product.
In the food industry, ethyl mercaptan is also used to create a characteristic smell for some processed foods. However, the use of this compound in these industries must always comply with strict regulations on occupational safety and consumer health protection.
4. How does Ethyl mercaptan (Ethanethiol) affect workers?
When exposed to ethyl mercaptan in the workplace, workers can face many serious health problems due to the toxic nature of this compound. Specifically, the vapor of ethyl mercaptan can cause irritation to the eyes, nose, and throat, increasing the risk of respiratory infections. People with long-term exposure or at high concentrations may experience coughing, difficulty breathing, or chest pain.
In addition to its immediate effects, ethyl mercaptan can also adversely affect the nervous system. Workers frequently exposed to this compound may experience symptoms such as dizziness, headache, fatigue, and loss of concentration. In severe cases, inhaling a large amount of ethyl mercaptan can lead to poisoning, causing central nervous system dysfunction, and even unconsciousness or death.
Furthermore, ethyl mercaptan can accumulate in the body if not eliminated in a timely manner, causing harm to the liver and kidneys. Continuous exposure to this chemical can increase the risk of liver and kidney diseases, especially when workers are in production plants or facilities using ethyl mercaptan without appropriate safety protection measures.
5. Permissible safe concentration of Ethyl mercaptan (Ethanethiol) for human exposure
The permissible safe concentration of ethyl mercaptan for human exposure depends on the regulations and guidelines of international health and occupational safety organizations. According to the standards of OSHA (Occupational Safety and Health Administration of the United States), the maximum permissible concentration of ethyl mercaptan in the air in a workplace is 0.5 parts per million (ppm) over an 8-hour workday. For short-term exposure situations, this concentration should not exceed 1 ppm.
The ACGIH (American Conference of Governmental Industrial Hygienists) also recommends a similar concentration level, with a TLV (Threshold Limit Value) for ethyl mercaptan of 0.5 ppm during a normal work shift. However, this concentration level may vary depending on factors such as exposure duration, type of work, and the health protection measures applied. In addition to international standards, regulations on ethyl mercaptan concentration are also adjusted according to each country and territory.

On a basic level, if working in an industrial environment, it is important to adhere to safety standards and limit exposure to Ethyl mercaptan. Organizations such as 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 Ethyl mercaptan (Ethanethiol) on workers
To minimize the health effects of ethyl mercaptan on workers, protective measures must be strictly applied in the workplace. One of the most important methods is to ensure an effective ventilation system in production areas where ethyl mercaptan is used or generated. Installing ventilation fans and air filtration systems helps to dilute the concentration of this compound, thereby reducing the risk of direct exposure of workers to the toxic vapor.
In addition, the use of personal protective equipment, such as anti-toxic gas masks, gloves, and protective clothing, is extremely necessary to protect workers from direct contact with ethyl mercaptan. This equipment helps prevent the inhalation of toxic gas vapors or skin contact, while also protecting sensitive parts of the body such as the eyes and respiratory tract.
Training and instructing workers on how to recognize the danger signs of ethyl mercaptan is also an important measure. Workers need to be equipped with knowledge about the harmful effects of this chemical and the procedures for handling incidents, such as first aid in case of poisoning or direct contact with the compound.
Furthermore, factories and production workshops must strictly adhere to regulations on monitoring chemical concentrations in the air to ensure that the level of ethyl mercaptan does not exceed the permissible safety limit. Regular inspection and maintenance of air quality control equipment are very important to protect the long-term health of workers.
Occupational safety training: Workers need to be trained and educated about 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 compliance with safety rules.
Periodically organize occupational environment monitoring in factories and enterprises, collecting and analyzing factors harmful to workers, thereby adjusting to reduce the level of harm to prevent occupational diseases for them.
7. Nationwide Occupational Environment Monitoring Center
Nam Viet’s Occupational Environment Monitoring Center is a professional unit for 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 focuses on customer satisfaction, meeting all customer needs, and committing to providing the best solutions for businesses.
With investment in technology, engineering, and human resources, Nam Viet’s monitoring center has become 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.
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- 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 conduct occupational environment monitoring professionally and effectively, Nam Viet offers our valued customers a price list for quality and reasonably priced occupational environment monitoring services.
- Our monitoring price list 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 advice and answer any questions about our monitoring services quickly and professionally.
- With Nam Viet’s monitoring price list, customers can easily choose service packages that suit their needs. We are committed to bringing our customers the highest satisfaction with our professional quality services.

