c in deed the one on the left side of the boundary line actually dissolves the seeds thus any bhp composition that falls within the shaded area of fig7 and 8 is suitable for practicing the present invention that is these bhp compositions do not freeze or crystallize when maintained at temperatures down to u2212 21 u00b0 c even after being subjected to one or more seeding procedures again the coordinates of this shaded triangle are expressed in weight percent of the three components of the phase diagram i e koh h 2 o 2 and h 2 o in that exact order and are as follows 26 4 16 0 57 6 for the top point 62 3 37 7 0 0 for the left bottom point nearest the koh scale and 46 8 53 2 0 0 for the right bottom point nearest the h 2 o 2 scale the point to the right of the u201c k 2 o 2 3h 2 o 2 u201d boundary line in fig8 is the traditional 7 10 5 m bhp prepared from 45 koh and 70 h 2 o 2 according to dobrynina et al the freezing point of 7 10 5 m bhp is u2212 31 u00b0 c the coil system is typically operated at around u2212 20 u00b0 c or u2212 21 u00b0 c thus the operating temperature is 10 u00b0 c above.