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Note: Do not rely on this information. It is very old.
Euchlorine
Euchlorine, a yellow gas which is evolved when potassium chlorate is acted upon by hydrochloric acid. Faraday believed it to be a definite oxide of chlorine, but it has been shown that it really consists of a varying mixture of chlorine and chlorine peroxide (CI 02). It has powerful oxidising properties, and is much used for disinfecting, etc.