Product Introduction BLUFLOC HA8520 PHPA Powder - Very High Molecular Weight, High Charge HA8520 is listed in the family TDS as a very-high-molecular-weight, high-charge white PHPA powder. BLUFLOC powder PHPA is described in the supplied family TDS as a water-soluble copolymer of anionic character used in drilling-fluid and selected oilfield applications. The four powder grades span very-high and ultra-high molecular-weight classes with medium or high charge. The table does