**BUY NOW** | PORTACAL® Hydrogen Sulfide calibration gas. Hydrogen sulfide gas is a flammable, poisonous gas with a characteristic odor of rotten eggs. Hydrogen sulfide (H2S) occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. It can also result from bacterial breakdown of organic matter. Hydrogen sulfide can also result from industrial activities, such as food processing, coke ovens, kraft paper mills, tanneries, and petroleum refineries.
Use PORTACAL® Hydrogen sulfide calibration gas to be sure your gas detection instrumentation is functioning properly.