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.
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.
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.
JasonLion said:If purchasing calcium chloride, be sure that it is pure enough for pool use. Some manufacturers have started allowing bromine in their calcium chloride, which is not good for chlorine pools.
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.
waterbear said:Where in the world did you copy that information? There is NO reason to add bromine to calcium chloride! (I assume that the person who wrote that was referring to sodium bromide). If you add bromides to a chlorine pool it will convert it to a bromine pool until the sun and additional chlorine burn off the bromine.
I suspect that whoever wrote that didn't really know what they were talking about!
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.
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.