Earth Pro pH Down Citric is often incorporated into acid formulations. Its function is to prevent the precipitation of gelatinous ferric hydroxide as the acid spends. As a sequestering agent, citric acid can hold as much as 3000 mg/l of ferric iron in spent acid solutions for more than 4 hours at temperatures above 80°C.
Earth Pro pH Down Citric is one of the most economical iron sequestering agents available. However, it should not be used at concentrations greater than 2 kg/m³ as it can precipitate calcium citrate if there is insufficient iron for it to sequester.
As a cementing additive, Earth Pro pH Down Citric can be used as a retarder as well as cement dispersant. It is normally used at between 0.1% and 0.3% by weight of cement.
Earth Pro pH Down Citric can also be used in a wide range of applications where the pH of aqueous fluids has to be lowered.
