What does hydrogen sulfide smell like?

Hydrogen sulfide has a strong and distinctive odor commonly associated with rotten eggs. This characteristic smell is a key aspect of identifying the presence of hydrogen sulfide, especially in industrial settings or areas where sulfur compounds are present. Recognizing this odor can be critical for safety, as hydrogen sulfide is a highly toxic gas that can pose serious health risks.

The other choices do not accurately represent the scent of hydrogen sulfide. Burnt popcorn, curdled milk, and fermented grains have different odor profiles that do not match the smell of rotten eggs, making them less relevant when it comes to identifying this hazardous substance. Understanding the unique smell of hydrogen sulfide is essential for workers in industries where exposure may occur, as it serves as an early warning sign of potential danger.