Ammonium sulfate

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Catalog Number
ACM7783202
Product Name
Ammonium sulfate
Structure
Structure
CAS
7783-20-2
Category
Metal & Ceramic Materials
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
Synonyms
Diammonium sulfate
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
Density
1.77 g/mL at 25 °C (lit.)
Solubility
Freely soluble in water, insoluble in ethanol
Appearance
Yellow to orange solid
Storage
Room Temperature
Autoignition Temperature
Not flammable (USCG, 1999)
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
3
Decomposition
When heated to decomposition it emits very toxic fumes of /sulfur oxides, nitrogen oxides and ammonia/.;On heating in an open system, the compound begins to decompose at about 150 °C, yielding ammonium bisulfate (NH4HSO4), and releasing ammonia.
EC Number
231-984-1;231-984-1;269-077-8
Exact Mass
132.02047791
Formal Charge
0
Hazard Statements
Xi,Xn
H-Bond Acceptor
4
H-Bond Donor
2
Heavy Atom Count
7
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
0
Safety Description
37/39-26-36
Stability
Stable under recommended storage conditions.
Supplemental Hazard Statements
H412-H303
Topological Polar Surface Area
90.6 Ų
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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