Total phosphorus 20 – 22 %
Soluble phosphorus > 95 % in 2% citric acid
> 95 % in alkaline ammonium citrate
> 50 % in water
Calcium 19.5 – 23 %
Ca : P ratio 0.9 – 1.1 : 1
pH (1% solution) 3.5 – 4.5
Ash insoluble in HCl 0.9 – 1.2 %
Moisture 0.7 %
Appearance off white granulate or powder
Apparent density 0.8 – 1.0 kg/l loose
0.9 - 1.1 kg/l tapped