DAP is high analysis fertilizer , used for soil application, During the manufacturing of DAP , binder or filler used as these material used in NPK mixture grade fertilizers
It will depend on the manufacturer as to how much (and what type) filler/binder is in the fertilizer. The product label should contain at least what the % is.
Thanks everyone, Filler and binder information is not written on the bag of DAP in India as it is used as a formulation and most of company had patent on this, however, we need to know this information also as it influenced the soil properties.