Buy HCL 4% Activator (only) in Bottles made from HDPE (FDA approved, corrosive chemical resistant plastic. Bottles with Control Drop Tips and leak proof caps. Free Shipping.

For each drop of 28% WPS Water Purification Solution, one drop of 4% HCL activator is required to generate chlorine dioxide.

    * Packaging or labels for 4% HCL activator May Vary Slightly From Individual Providers