A toxic, corrosive gas found in sewers, wastewater, and oil & gas operations.

Common in refrigeration, fertilizer, and chemical processing plants.

A colourless, odourless gas from combustion, engines, and enclosed spaces.

A hazardous VOC found in petrochemical and refinery operations.

Found in manufacturing, construction materials, and indoor air testing.

Monitored in confined spaces, breathing air testing, and ventilation checks.