Hydrogen Sulfide — Recognize and React to the Silent Killer
Did You Know?
H₂S is one of the leading causes of gas inhalation deaths in the workplace. [1]
KNOW THE RISK
- Hydrogen sulfide (H₂S) is a colorless gas known for its “rotten egg” smell. It occurs naturally during the breakdown of organic materials and is common in oil and gas, wastewater treatment, and agriculture. [1]
- H₂S is both extremely flammable and highly toxic, posing a dual threat of explosion and poisoning. [1]
- Although it can be detected by smell at low levels, the sense of smell becomes paralyzed at higher concentrations, making it unreliable for detection. Never rely on your nose as a warning system.
MITIGATE THE RISK
1. Do Not Rely on Smell
- Use proper detection equipment — odor becomes ineffective as a warning sign when H₂S levels rise. [3]
2. Identify Potential Sources of H₂S
- Assess all processes or environments where H₂S could be released, such as confined spaces, sewage lines, or chemical reactions. [3]
3. Use Calibrated Monitors to Detect Airborne Levels
- Air monitoring should be continuous in high-risk areas. Always test before entry and during occupancy in confined or enclosed spaces. [3]
CHEMICAL SAFETY REMINDER
Hydrogen sulfide is a silent killer — undetectable by smell at dangerous levels. Always monitor the air, know your environment, and take H₂S exposure seriously. Prevention starts with awareness and the right tools.