PPS (C8H11NO3S) Pyridinium propyl sulfobetaine CAS No. 15471-17-7 Appearance: White crystalline powder Assay: â?¥99% PH: 2.5~6.0 (50% aqueous solution) Addition level: 50~150mg/l Consumption: 10g/ KAH Application: In watts bright nickel plating, It is a start material to make brightener, a high efficiency brightener and leveler. Because of its high purity, PPS cant carry other harmful impurity or salts to baths. There will not have problem of ductility in long duration. It is used to combine with saccharin, one or more ethynes and wetting agent. These make nickel deposit become special bright, level and have good ductility, it is also suitable for still bath.