Souble Fertilizer NH2PO4 (MAP)

Souble Fertilizer NH2PO4 (MAP)


Chemical formula:NH4H2PO4

CAS NO.: 7783-28-0
Properties: White powder crystal; relative density is 1.803(19℃), melting point is 190℃, easily soluble in water, slightly soluble in alcohol, insoluble in alcohol, pH value of 1% water solution is 4.5.

Technical Specifications:

No. Index Technical grade
1 Main content %≥ 99.0
2 P2O5 %≥ 61.0
3 Nitrogen, as N %≥ 12.0
4 pH of 1% water solution 4.4-4.8
5 Moisture %≤ 0.1
6 Heavy metal, as Pb %≤ 0.001
7 Arsenic, as As %≤ 0.0003
8 Fluoride, as F %≤ 0.002
9 Water insoluble %≤ 0.05


Packaging: 25kg in plastic woven bag with PE lining. Stored in ventilated and dry place.

The advantages of MAP

Fully water-soluble

Consists of 100% plant nutrients

Highly-concentrated source of phosphorus for plants (61% P2O5 / 27% P)

Free of chloride, sodium and other detrimental elements for plants

Moderately low pH (safer and less corrosive compared to urea phosphate)

Suitable for the fertigation, foliar application and production of fertilizer blends and nutrient solutions

Double benefit:

Not only that MAP is an efficient source of phosphorus, it also facilitates plant uptake of the phosphorus naturally present in the soil. This is due to the ammonium (NH4+) in MAP, which lowers the pH in the root zone and thus enhances phosphorus availability.

Chemical Analysis

Component Range Typical
Main content 99%min 99.2%
P2O5 61%min 61%
NasNH4 11.8%min 12%
Moisture 0.2%max 0.2%
Insolubles 0.1%max 0.1%
PH Value 4.4-4.8 4.6
As 0.0003%max 0.0003%
Pb 0.001%max 0.001%
F 0.002%max 0.002%