Polyquat 60

It does appear to be Poly-Quat 60

Found on the web...
BioGuard Algae All 60® (Treatment & Prevention)
Non-foaming 60% poly-quat effectively prevents a broad spectrum of algae. Great for use in situations where fountains, water falls, or other water features are a part of the swimming pool circulation system.

According to the MSDS (which I found here- http://www.thepoolandspahouse.com/tools ... L%2060.pdf):

COMPOSITION / INFORMATION ON INGREDIENTS
Chemical Name
Poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene
dichloride]

CAS#
31075-24-8

Wt.%
60
 
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