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Fertilizers are materials of natural or synthetic origin that are applied to soils or to plant tissues to supply one or more plant nutrients essential to the growth of plants. Phosphates are used to produce fertilizers.

Phosphates are the naturally occurring form of the element phosphorus, found in many phosphate minerals. In mineralogy and geology, phosphate refers to a rock or ore containing phosphate ions. Inorganic phosphates are mined to obtain phosphorus for use in agriculture and industry.

Phosphates differ by their P₂O₅ concentration and some other characteristics.

Phosphate 65% BPL
Major elements	%
P2O5	29-30
H2O	0.8-1.0
CO2	6.8-7.5
CaO	49.0-50.5
MgO	1.0-1.2
Fe2O3	0.3-0.4
Al2O3	0.35-0.40
SiO2	2.0-3.0
SO3	2.5-3.5
Na2O	1.1-1.3
K2O	0.10-0.15
F	3.5-3.7
P.A.F. CO2 Deduced	3.0-3.5
Cl (ppm)	300-400

Sizing
Sieve	Tailings %	Undersize %
200 µ	70	61.18
160 µ	90	18.25
125 µ	115	10.59
100 µ	150	4.62
80 µ	185	2.9
<80 µ	<185	2.46

Phosphate 72% BPL
Major elements	%
P2O5	32-33
H2O	0.2-0.4
CO2	3.5-4.0
CaO	52-53
MgO	0.6-1.0
Fe2O3	0.35-0.40
Al2O3	0.3-0.4
SiO2	2.0-2.5
SO3	2.0-3.0
Na2O	1.1-1.3
K2O	0.10-0.15
F	3.7-3.9
P.A.F. CO2 Deduced	1.6-1.5
Cl (ppm)	300-400

Sizing
Sieve	Tailings %	Undersize %
200 µ	70	46.77
160 µ	90	12.72
125 µ	115	14.38
100 µ	150	10.96
80 µ	185	5.28
<80 µ	<185	9.89

Phosphate 73-75% BPL
Major elements	%
P2O5	33-34
H2O	0.2-0.4
CO2	1.0-1.5
CaO	55-56
MgO	1.0-1.2
Fe2O3	0.3-0.4
Al2O3	0.3-0.4
SiO2	1.0-2.0
SO3	2.0-2.5
Na2O	1.1-1.3
K2O	0.1-0.15
F	3.8-4.0
P.A.F. CO2 Deduced	0.8-1.0
Cl (ppm)	200

Sizing
Sieve	Tailings %	Undersize %
200 µ	70	39.91
160 µ	90	16.65
125 µ	115	17.64
100 µ	150	10.52
80 µ	185	7.37
<80 µ	<185	7.91

Phosphate 68% BPL
Major elements	%
P2O5	30.2-31.1
H2O	0.2-0.5
CO2	5-6
CaO	50-52
MgO	0.8-1.0
Fe2O3	0.3-0.4
Al2O3	0.3-0.4
SiO2	2.5-3.0
SO3	2.0-3.0
Na2O	1.1-1.3
K2O	0.1-0.2
F	3.5-4.0
P.A.F. CO2 Deduced	2.0-2.5
Cl (ppm)	400

Sizing
Sieve	Tailings %	Undersize %
200 µ	70	49.58
160 µ	90	15.01
125 µ	115	14.93
100 µ	150	8.58
80 µ	185	3.92
<80 µ	<185	7.98

Phosphate 63-65% BPL
Major elements	%
P2O5	28 - 29
CO2	7,2 - 7,8
SO3	2,50 - 3,00
CaO	48,30 - 49,00
MgO	1,10 - 1,50
Fe2O3	0,35 - 0,40
Al2O3	0,35 - 0,40
Na2O	1,10 - 1,20
K2O	0,09 - 0,10
SiO2	2,50 - 3,00
Humidity (HO2)	0,90 - 1,00
Loss of Ignition (LOI)	2,80 - 3,20
Fluor (F)	3,50 - 3,60
Chlore  (Cl)  ppm	400 - 500
Organic C	0,10 - 0,20
P2O5 solvable in  2 % citric acid	10,00 - 11,00
P2O5 solvable in  2 % formic acid	18,00 - 21,00

Sizing
Microns diameter	%
200 µ	72,83
160 µ	13,77
125 µ	6,58
100 µ	2,21
80 µ	3,11
<80 µ	1,50
Total	100

Phosphate 66-68% BPL
Major elements	%
P2O5	30 - 30,2
CO2	6,00 - 6,30
SO3	2,50 - 3,00
CaO	50,00 - 51,00
MgO	0,75 - 1,00
Fe2O3	0,30 - 0,40
Al2O3	0,40 - 0,50
Na2O	1,10 - 1,30
K2O	0,07 - 0,10
SiO2	2,00 – 2,50
Humidity (HO2)	0,50 - 2,00
Loss of Ignition (LOI)	2,50 - 3,00
Fluor (F)	3,65 - 3,80
Chlore  (Cl)  ppm	400 - 500
Organic C	0,10 - 0,20
P2O5 solvable in  2 % citric acid	9,00 - 10,00
P2O5 solvable in  2 % formic acid	18,00 - 20,00

Sizing
Microns diameter	%
200 µ	60,05
160 µ	18,99
125 µ	13,72
100 µ	4,30
80 µ	1.16
<80 µ	1,78
Total	100