I had something like that for organic chlorine compounds, a test built into small plastic test tubes.

What I had was a substance in a test tube that would turn red in the presence of organic chlorine compounds.

As a common disinfectant, chlorine compounds are used in swimming pools to keep them clean and sanitary.

Chlorates are the most common +5 chlorine compounds.

Perchlorates are the most common +7 chlorine compounds.

A still uncertain shortage that looms this month is for chlorine compounds used the the national water purification plants.

The chlorine compounds react with the sulfuric acid, thinning the ozone.

Over 2000 naturally occurring organic chlorine compounds are known.

About 15,000 chlorine compounds are being used commercially.

The related chlorine compounds are all easily removed by rainfall.