Residual chlorine reagent usually refers to a special composite reagent used to detect residual chlorine value, including liquid, solid, powder, etc., and there is no unified name.

Residual chlorine reagents mainly generate colored compounds through chemical reactions between specific reagents and residual chlorine. The color of these compounds is proportional to the residual chlorine value, and the remaining chlorine value is determined by comparing with a standard color chart. The colors that usually react are red and yellow.

The use of residual chlorine reagent is relatively simple, and different brands of products may have slight differences. Generally, a certain amount of water sample is taken, residual chlorine reagent is added, and after reaction, the color of the detection solution is compared with the color of the standard color card to obtain the remaining chlorine concentration values.

Residual chlorine reagents are used in industries that require monitoring of residual chlorine, such as water supply, food processing, healthcare, aquaculture, and more.