How It’s Used Hydrogen chloride (aka chlorane) is a colorless gas with a sharp, pungent odor. The compound fumes strongly in moist air. It is used in the production of fertilizers, dyes, in electroplating, and in the photographic, textile, and rubber industries. HCl is used in the manufacture of organics such as dichloroethane and vinyl … Continue reading Hydrogen Chloride—and Hydrogen Chloride Monitoring Instrumentation