commodity: CSDS best substitute of STPP in detergent powder making full name of CSDS Complex Sodium DiSilicate specification ITEM INDEX TEST RESULT Calcium exchange capacity 400 min mgCaCO3 per gCSDS 451.06 Humidity 5pct max 2.5 PH value 12max 11.27 SiO2 20pct min 23.08 Whiteness 80pct min 87.99 Visual specific weight 0.35-095 Packing 40kgs in plastic woven bag with inner plastic film bag One contaier load17 tons in20FT container Advantage: 1. completely friendly to environment 2. excellent function and high calcium exchange ability (400min), better than STPP 3. excellent PH buffering capacity 4. competitive price to reduce much cost 5. be used same as STPP in producing process, without any change in equipment 6. not easily absorb moisture in air to become cake. For more info, please feel free to contact me.