PORTACAL® Carbonyl Sulfide calibration. Carbonyl sulfide (COS) is a colorless, poisonous, flammable gas with a distinct sulfide odor. Carbonyl Sulfide is toxic and narcotic in low concentrations and presents a moderate fire hazard. Carbonyl Sulfide is widely used as a fumigant.

Use PORTACAL® Carbonyl sulfide calibration gas to be sure your gas detection instrumentation is functioning properly.