SAP( Super Absorbent Polymer). chemical name: Polyacrylic acid sodium salt, sodium polyacrylate CAS No. 9003-04-7 SAP For Sanitary Napkins,SAP for sanitary towel, SAP for feminine hygiene,SAP for Agriculture, Super Absorbent Polymer, SAP For Diaper. Appearance: white crystal. Free absorbency of Distilled water:450~550 g/g Free absorbency of saline solution: 50 min. g/g Centrifugal Retention capacity: 35 ming/g Absorbency under Load 0.3 psi,: 26 min. Absorbency under Load 0.7 psi,: 20 min, Absorption speed (by vorlex Method): 60 s max. Moisture: 7.0% max.