Table 2: Chemical composition of the phosphate.

Chemical characteristicsPercentages (%wt)

P2O528
SiO23.25
Al2O31.47
Fe2O30.34
CaO45.05
MgO1.20
KO20.52
MnO<0.01
TiO20.03
BPL61.18

BPL (bone phosphate of lime) = 2.185 P2O5.