Chlorine is not particularly soluble in water. At atmospheric pressure
pressure, maximum solubility occurs at 49.3°F (9.6°C), at which
point approximately 1% dissolves. Below this temperature chlorine combines
with water to form a solid hydrate, Cl2
·8H2O, known as "chlorine ice".
Chart below provides data on the suitability of various materials for
handling saturated chlorine water at various temperatures.
The solubility characteristics of chlorine in water are given
here.
Possible temperature increase should be carefully considered in
designing a chlorine water system. Many materials will handle chlorine
water with no difficulty, but if the temperature rises sufficiently
to release free (wet) chlorine gas, some piping material will fail.
Chlorine Water, Saturated - maximum use temperatures
1If decomposition to free chlorine is possible PP resins
should not be used. PVDF resin is preferred material.
2pH sensitive.
