Dichlor Tabs – Dichloroisocyanuric Acid

Formula
ph
Available Cl
Molar mass
CYA/kg(62%)/ 50kL
Cl/kg(62%)/ 50kL
C3HCl2N3O3
7
56-62%
197.96g/mol
10ppm
11.1ppm
Chlorine tabs are primarily used to maintain chlorine levels. They dissolve slowly over time and slowly introduce chlorine in to your pool. Dichlor in particular is unique among chlorine varieties as it has a neutral ph and so will not affect the overall ph of your pool water.

Dichlor contains a very high concentration of sunblock (Cyanuric Acid – CYA) at 0.9ppm for every 1.0ppm of chlorine introduced in to the pool. Whilst this can be a great thing and help prevent chlorine loss from ultraviolet light, if the sunblock levels get too high, the chlorine will become saturated and no longer be readily available to combat bacteria in the water and prevent your pool from turning green.

Similarly to granular chlorine, if chlorine tabs come in to direct contact with pool surfaces they can cause damage. In particular, high concentrations of chlorine in contact with vinyl pool surfaces causes disfiguration and discoloration. Tabs are best used either in a floating dispensor or in a plumbed in chlorine tab container.

Dichloroisocyanuric Acid Structure

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  1. Pingback: Chlorine Chemistry

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