Ammonium Sulfate FAQ

Ammonium sulfate is an inorganic salt with the chemical formula (NH4)2SO4. The fertilizer grade is described by its analysis as 21-0-0-24S — approximately 21% nitrogen and 24% sulfur, with no phosphorus or potassium.

It is the fertilizer grade of ammonium sulfate, used as a straight source of nitrogen and sulfur. The nitrogen is in the ammonium form and the sulfur in the sulfate form, both directly available to plants.

It is the standard analysis notation for ammonium sulfate: 21% nitrogen, 0% phosphorus, 0% potassium and 24% sulfur. The S is written separately because the N-P-K convention does not include sulfur. The figures are nominal; the analysis for a specific cargo is declared on its certificate of analysis.

Three broad uses: as a straight nitrogen and sulfur fertilizer applied directly to the soil, as a raw material in compound fertilizer and NPK production, and in industrial processes requiring a sulfate or ammonium source.

Yes — we supply both granular and crystalline ammonium sulfate. Tell us the form, quantity and destination and we will confirm the particle size and analysis available for your shipment — including when a specific particle size requirement cannot be met.

Chemically, yes — both are (NH4)2SO4 with the same nominal analysis. The difference is physical form. Granular material has coarser, more uniform particles, which is what bulk blenders and mechanical spreading equipment require. Crystalline material dissolves faster.

Yes — this website exists to serve international ammonium sulfate buyers. Availability, documentation and any inspection requirement are confirmed for the specific product, quantity and destination before you commit.

25 kg bags, 50 kg bags, jumbo bags (FIBC) and bulk cargo in vessel. Bag material, liner, printing and palletisation are agreed per order.

Loading quantity depends on packaging, container type and shipping requirements. Bag dimensions, the palletisation decision, the container internal volume and the road weight limits on the inland leg all change the answer. We confirm the loaded quantity for your specific order before you commit.

Yes — container shipment is the standard route for bagged material, trial orders and distribution programmes. We quote FOB, CFR or CIF: tell us the trade term you want to work on together with your destination port, and the quotation is issued on that basis.

Bulk vessel shipment is arranged for large-volume programmes where the loading port and the destination discharge facilities allow it. Ask us to compare the bulk and bagged options for your route and volume.

Yes. The certificate of analysis is issued by the manufacturer for the specific production lot shipped, and it is available before the balance payment. It should be traceable to the lot you received.

Yes. A technical data sheet describing the product properties, handling and storage is provided for the grade offered.

We do not claim certification on this website that we have not verified and been given permission to publish. If your market or customer requires a particular certificate, raise it at the enquiry stage and we will confirm whether it can be obtained for your order before contract.