This post asked about bromine in calcium chloride.
Note: The quote was taken slightly out of context. I was only referring to calcium chloride sold as a deicer. The sticky the quote was taken from has been changed to clarify this.Originally Posted by JasonLion
Calcium chloride sold as a deicer tends to have some bromine in it because there is bromine in the brine that calcium chloride is manufactured from and Dow decided to stop taking it out, see this statement from Dow. Dow is the primary supplier of calcium chloride in the US. Food grade calcium chloride is fine, but it is difficult to find at the consumer level.Originally Posted by waterbear
Any calcium product sold for pool use will have been made from food grade materials and will be fine. For pool use you will normally find calcium chloride dihydrate, not calcium chloride.