Optimising the dose and application to crops in the soil, Ammonium Sulphate is a very good source of supply of this element, and is easy to mix and use.
The form of Ammonium is usually guickly assimilated by crops, although in large volumes it can become phytotoxic to the plant.
İn fact, in hydroponics, its use is limited to a maximum of 15-20% of the total fraction of Nitrogen, the remaining being 80-85% Nitric Nitrogen.

Appearance Crystal
Total nitrogen (N), max, % 21
Mass fraction of free sulfuric acid, not 0.050
more ,%:
Mass fraction of insoluble residue, not 0.050
more, %:
Mass fraction of water, not more, % : 0.30
Friability 100