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Salts & Minerals

Ammonium sulfate

CAS: 7783-20-2

Overview

Ammonium sulfate (CAS 7783-20-2 ) is an inorganic salt supplying both nitrogen and sulfur to crops, making it one of the most established nitrogen fertilizers in commercial agriculture.

Beyond agriculture, it functions as a pH buffer, protein precipitant, and process chemical across food, industrial, and water treatment applications. It is a versatile chemical used globally.

In fertilizer production and direct soil application, it delivers readily available nitrogen and sulfur to sulfur-deficient soils, particularly for crops like canola, wheat, and corn.

Food and fermentation manufacturers use it as a yeast nutrient and dough conditioner, where it supports consistent fermentation performance in baked goods and brewing processes.

In water treatment, it serves as a source of ammonia for chloramine disinfection, helping utilities maintain residual disinfectant levels across distribution networks for safety.

Textile and leather processors apply it as a pH buffer in dyeing baths, improving dye uptake uniformity and process control. This ensures high-quality finishes in industrial manufacturing.

Ammonium sulfate is supplied as white crystalline granules, standard granules, and fine powder. Agricultural-grade material is available in bulk and bagged formats for large-scale use.

Food-grade material is produced to FCC and USP standards. Technical and industrial grades are also commercially available for water treatment and process chemistry applications.

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Physical Properties

Melting Point>280 °C
Density1.769 g/cm³ @ Temp: 50 °C
Flash Point26 °C
AppearanceWhite crystalline powder
ColorYellow to orange
OdorSlight odor of ammonia
FormSolid
Water Solubility77 g/100 mL (25 ºC)
Vapor Pressure<1 Pa (25 °C)
Refractive Indexn 20/D 1.396
pH5.0-6.0 (25℃, 1M in H2O)
Log P-5.1 at 25℃

Safety & Handling

Warning GHS07 Hazard Statements H402 Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard] H412 Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]

Trade & Regulatory

HS Code31022100
Storage Class13 - Non Combustible Solids
WGK (Germany)1

Other Names

sulfuric aciddiammonium salt | sulfuric acid ammonium salt (1:2) | diammonium sulfate | ammonium sulphate | ammonium sulfate (2:1) | (NH4)2SO4 | Dolamin | Diammonium sulphate

Related Products

Chemical Properties

CAS Number
7783-20-2
EC Number
231-984-1
Mol. Weight
132.14
HS Code
31022100

Industries

Documentation