Ammonium Sulphate

Ammonium Sulphate

CAS No.:7783-20-2

Molecular Formula: (NH4)2SO4        Molecular Weight:132.14

Structural Formula:


Ammonium Sulphate has PH value is 5.5 in 0.1M solution. Density 1.769 g/cm3 (20°C). Ammonium Sulphate is hygroscopic; soluble in water; insoluble in acetone, alcohol and ether. Main active ingredients are 21% nitrogen and 24% sulfur, so it can be described as NPK 21-0-0 24S. Generally, it is a by-product from chemical (cyanuric acid, capro, acrylonitrile, sodium cyanide, monosodium glutamate-MSG, methyl methacrylate-MMA, etc.) or steel plant. Steel Grade (also call Coke-ovens Grade) is fine white powder. After processing it can be white granular or flake. Caprolactam Grade is colorless (achromatic) crystalline or yellowish crystals.


ItemStandardSteel gradeCompactedGranula RANULAR
Appearance:White granularWhite and/or off white and/or or yellor and/or light yellow and/or grayWhite and/or off whiteBrick red Some fillers insoluble in water
Nitrogen:20.5% min 20.5% min20.5% min17.0% min
Moisture:1.5% max1.0% max2.0% max2.0% max
Free Acid:0.20% max0.20% max0.20% max0.20% max



Ammonium Sulphate is one of the most common use and most typical inorganic nitrogen fertilizer. Ammonium Sulphate is the best fast release, quick acting fertilizer, which can be directly used for a variety of soil and crops. It can also be used as kinds of seed fertilizers, base fertilizer and additional fertilizer. It is particularly suitable for the soil which lack of sulfur, low chlorine tolerance crops, sulfur-philic crops.

Ammonium Sulphate is very popular in Japan, Southeast Asia, as well as northeast China where plant premium rice. It is suitable for the rice seedling, the growth of tea, grass, vegetables, and fruit trees, effectually rapid promoting the growth of grain, vegetables, fruits, grass and other plants. It has more efficiency than urea, ammonium bicarbonate, ammonium chloride, ammonium nitrate etc. Large granular Ammonium Sulphate can also serve as raw material for compound fertilizer. As feed additives, it provides the nutrients of non-protein nitrogen to ruminants. Ammonium Sulphate also used for fish culture in some areas.


1 Try not to use Ammonium Sulphate in paddy fields.

2 Ammonium sulphate are acidic fertilizers. It can increase the acidity of the soil, Therefore should pay attention to use in acidic soils with alkaline fertilizer, such as plant ash, phosphate rock powder or calcium magnesium phosphate and so on. Use in neutral and alkaline soil in order to prevent calcium ion combined with sulfate ion to insoluble calcium sulfate (gypsum), caused by soil hardened, and should apply with organic fertilizer.


In chemical industry, Ammonium Sulphate as the raw materials of hydrogen peroxide, ammonium alum and ammonium chloride; and the minor ingredient of ammonium persulfate, lysine.

In welding industry, Ammonium Sulphate as a welding agent.

In textile industry, Ammonium Sulphate as a flame retardant.

In electroplating industry, Ammonium Sulphate as a plating bath additive.

In dyeing industry, Ammonium Sulphate as a dyeing auxiliaries of acid dyes.

In leather industry, Ammonium Sulphate as a deliming agent.

In food industry, Ammonium Sulphate as a dough conditioning agent (fermentation medium), and a catalyst of sauce food.

In pharmaceutical industry, Ammonium Sulphate as a salting-out agent can purifying proteins by precipitation

In pesticide industry, Ammonium Sulphate as an adjuvant agent. Add in water soluble insecticides, herbicides, and fungicides, such as 2,4-D Amine Salt, glyphosate, and glufosinate herbicides.


20kg, 25kg, 50Kg PP woven bag with PE inner bag or composite plastic woven bag.1MT (1000kg) or 1.1MT (1100kg) jumbo bag. Shrink-wrapped with pallet is available.

Kept in dry and place, avoid moisture, water, rain and fire, normal transportation.

In the transportation and outdoor storage, Ammonium Sulphate should be kept away from moisture, insolation, rain & high temperature. Should storage in flatness ground within a ventilating low-temperature dry warehouse. In order to prevent deterioration, strictly prohibit store nearby alkaline substances, such as lime, cement and plant ash. The stacking height should be less than 7 meters.

Key Words: Ammonium Sulphate;Ammonium Sulphate Granular

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