CAS 7783-20-2 Ammonium sulfate - Materials / Alfa Chemistry

NAVIGATION

Ammonium sulfate

PRICE INQUIRY

Catalog Number

ACM7783202

CAS Number

7783-20-2

Product Name

Ammonium sulfate

Structure

Category

Salt; Electrolytes

Synonyms

Diammonium sulfate

Description

Ammonium sulfate is a white odorless solid. Sinks and dissolves in water. (USCG, 1999);DryPowder; DryPowder, PelletsLargeCrystals; DryPowder, PelletsLargeCrystals, Liquid; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, Liquid; WetSolid;White powder, shining plates or crystalline fragments

IUPAC Name

Diazanium;sulfate

Molecular Weight

132.14

Molecular Formula

(NH4)2SO4;(NH4)2SO4;H8N2O4S

Canonical SMILES

[NH4+].[NH4+].[O-]S(=O)(=O)[O-]

InChI

InChI=1S/2H3N.H₂O4S/c;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)

InChI Key

BFNBIHQBYMNNAN-UHFFFAOYSA-N

Melting Point

>280 °C

Flash Point

26°C

Purity

99%+

Density

1.77 g/mL at 25 °C (lit.)

Solubility

Freely soluble in water, insoluble in ethanol

Appearance

Yellow to orange solid

Application

Ammonium sulfate, represented by the formula \((NH_4)_2SO_4\), is a versatile compound primarily purposed as a nitrogenous fertilizer, holding approximately 21% nitrogen and 24% sulfur. Its stability and low hygroscopicity make it a preferred choice for agricultural applications, particularly in soils with neutral to alkaline pH, where it effectively counters high calcium levels and soil alkalinity. As a slow-releasing fertilizer, ammonium sulfate provides a steady supply of nitrogen throughout the growing season, making it highly effective for crops such as wheat, corn, rice, and potatoes. Besides its role in agriculture, ammonium sulfate is utilized in the manufacture of various chemicals, flameproofing materials, and as a component in microbiological culture media. Commercial production has evolved from traditional ammonia and sulfuric acid reactions to utilizing by-products from industrial activities like steel production and sulfuric acid desulfurization. While advantageous for its agronomic effectiveness and application on suitable soils, ammonium sulfate's use requires careful consideration due to its potential soil acidification effects and relatively lower nitrogen content compared to alternative fertilizers.

Storage

Room Temperature

Color/Form

White or brown orthorhombic crystals;Orthorhombic crystals or white granules;Brownish gray to white crystals according to degree of purity

Complexity

62.2

Corrosivity

Does not attack iron or aluminum /Ammoniacal solutions/

Covalently-Bonded Unit Count

EC Number

231-984-1;231-984-1;269-077-8

Exact Mass

132.02047791

Formal Charge

Hazard Statements

Xi,Xn

Heavy Atom Count

MeSH Entry Terms

Ammonium Sulfate;Sulfate, Ammonium

Monoisotopic Mass

132.02047791

Odor

Slight odor of ammonia

Other Experimental

Average specific heat capacity: 1.423 J/g-K at 2-55 °C; heat of solution on dissolution of 1 mol in 400 mol water: +9.92 kJ at 18 °C; integral heat of solution: +6.57 kJ/mol at 30 °C; differential heat of solution for saturated solution: +6.07 kJ/mol at 30 °C; deliquesces above 80% relative humidity;Decomposes above 280 °C

Refractive Index

Index of refraction: 1.521, 1.523, 1.533

Rotatable Bond Count

Safety Description

37/39-26-36

Stability

Stable under recommended storage conditions.

Supplemental Hazard Statements

H412-H303

Topological Polar Surface Area

90.6 Å²

UNII

SU46BAM238

Vapor Pressure

Vapor pressure of saturated solution: 0.901 kPa at 10 °C; 1.319 kPa at 15 °C; 1.871 kPa at 20 °C; 2.573 kPa at 25 °C; 3.439 kPa at 30 °C; 4.474 kPa at 35 °C

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