4A zeolite has strong power of calcium exchange and compatibility and without pollution, it is ideal phosphate-free addition that substitutes for stpp as a detergent builder. Please refer our main specification as below: 1. Excellent ca ion exchanging rate >320 mg caco3/g, strong soften ability 2. High and stable whiteness >97 , it make your detergent powder whiter 3. Ph1%, 25ph value
