2.02.210 Phosphate Fertilizer Properties

¶ Typical Properties of Common Phosphate Fertilizer Materials (Actual values vary. Information is only a guide.)
Material Name	Chemical Formula	Fertilizer Analysis		Density lb/ft3	Angle of Repose
Material Name	Chemical Formula	P₂O₅	Other	Density lb/ft3	Angle of Repose
Phosphate rock	Ca₁₀F₂(PO₄)₆•XCaCO₃	3 to 4%	---	---	---
Single superphosphate	Ca(H₂PO₄)₂ + CaSO₄	16% to 20%	11 to 12% S	58 to 60	---
Triple superphosphate	Ca(H₂PO₄)₂	44% to 46%	---	73 to 75 lb/ft³	---
Diammonium phosphate	(NH₄)₂HPO₄	46%	18% N	58 to 60 lb/ft³	32°
Monoammonium phosphate	NH₄H₂PO₄	52%	11% N	60 to 62 lb/ft³	32°
Material Name	Chemical Formula	Fertilizer Analysis		Density lb/gal	Salt-Out Temperature
Material Name	Chemical Formula	P₂O₅	Other	Density lb/gal	Salt-Out Temperature
Phosphoric acid	H3PO4	40% to 55%	---	12.0 to 14.0	---
Polyphosphoric acid	H_(n+2)P_nO_(3n+1)	69% to 72%	---	15.1 to 17.3	---
Ammonium polyphosphate	NH₄H₂PO₄ + (NH₄)₃HP₂O₇	34%	10% N	11.6 to 11.7	-10°
-----	-----	37%	11% N	11.9	< 32º
9-18-9	mixed fertilizer	18%	9% N, 9 % K₂O	11.1	< 20º
3-18-18	mixed fertilizer	18%	3% N, 18% K₂O	11.8	---
6-24-6	mixed fertilizer	24%	6% N, 6% K₂O	11.2	10º
7-21-7	mixed fertilizer	21%	7% N, 7% K₂O	11.2	20º
4-10-10	mixed fertilizer	10%	4% N, 10% K₂O	10.3	18º

¶ Estimated Density of Fluid Products
Temperature ºF	Density pounds per gallon
20	11.76
30	11.74
40	11.72
50	11.70
60	11.68
70	11.66
80	11.64
90	11.62
100	11.60

¶ Typical Properties of Common Phosphate Fertilizer Materials