... %, is two times higher than the content of boron in borax.2,Quick dissolve, this product dissolves quickly ... , the speed of dissolving in water at 0°C is 2.2 times ... %, is two times higher than the content of boron in borax.2,Quick dissolve, this product dissolves quickly ... , the speed of dissolving in water at 0°C is 2.2 times ...