PCT Ltd (PCTL)

[ACE13]

500 PPM was the standard that was tested for the first EPA registered HOCL product. On the labels it typically shows as 460 PPM even though it is produced at 500 PPM. Typically the higher the PPM the less stable the HOCL product, so there is an issue of shelf life. When you have a site generated HOCL that should not be a problem because it will usually be used the same day it is made.