Iron alum indicator solution , CAS No.7783-83-7

CAS: 7783-83-7 Cat. No.: A196483 Formula: NH₄Fe(SO₄)₂ · 12H₂O Molecular Weight: 482.19 EC Number: 616-517-5 PubChem CID: 197097

Synonyms

7783-83-7|Ferric ammonium sulfate dodecahydrate|Iron ammonium sulfate dodecahydrate|Ammonium iron sulfate dodecahydrate|azanium;iron(3+);disulfate;dodecahydrate|Sulfuric acid, ammonium iron(3+) salt (2:1:1), dodecahydrate|MFCD00150004|65390568Z5|Azane;hyd

Storage

Protected from light,Room temperature,Cool

Shipped In

Normal

Overview

Ammonium iron(III) sulfate dodecahydrate is often employed as an analytical standard, and has been used in a variety of other applications from nanomaterials to general redox reactions. This product is much less affected by oxygen in the air than iron(II) sulfate, making it more desirable for titration purposes, where iron(II) might be oxidized to iron(III). The oxidation of iron(II) to iron(III) is pH dependent, and the reaction occurs more rapidly at higher pH; this product lowers the pH of solutions slightly, thereby preventing oxidation from occurring.
An oxidation resistant analytical standard.

Specifications

Synonyms

7783-83-7 | Ferric ammonium sulfate dodecahydrate | Iron ammonium sulfate dodecahydrate | Ammonium iron sulfate dodecahydrate | azanium;iron(3+);disulfate;dodecahydrate | Sulfuric acid, ammonium iron(3+) salt (2:1:1), dodecahydrate | MFCD00150004 | 65390568Z5 | Azane;hyd

Storage

Protected from light,Room temperature,Cool

Shipped In

Normal

Names and Identifiers

Pubchem Sid

528776129

Canonical Smiles

[NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Fe+3]

IUPAC Name

azanium;iron(3+);disulfate;dodecahydrate

InChIKey

LCPUDZUWZDSKMX-UHFFFAOYSA-K

INCHI

1S/Fe.H3N.2H2O4S.12H2O/c;;2*1-5(2,3)4;;;;;;;;;;;;/h;1H3;2*(H2,1,2,3,4);12*1H2/q+3;;;;;;;;;;;;;;;/p-3

Isomeric SMILES

[NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Fe+3]

WGK Germany

3

RTECS

WS5900000

Alternate CAS

10138-04-2

PubChem CID

197097

Molecular Weight

482.19

Taxonomic Classification

Taxonomy Tree

• Kingdom Inorganic compounds
  • Superclass Mixed metal/non-metal compounds
    • Class Transition metal oxoanionic compounds
      • Subclass Transition metal sulfates

• Kingdom: Inorganic compounds
• Superclass: Mixed metal/non-metal compounds
• Class: Transition metal oxoanionic compounds
• Subclass: Transition metal sulfates
• Intermediate Tree Nodes: Not available
• Direct Parent: Transition metal sulfates
• Alternative Parents: Inorganic salts Inorganic oxides
• Molecular Framework: Not available
• Substituents: Transition metal sulfate - Inorganic oxide - Inorganic salt
• Description: This compound belongs to the class of inorganic compounds known as transition metal sulfates. These are inorganic compounds in which the largest oxoanion is sulfate, and in which the heaviest atom not in an oxoanion is a transition metal.
• External Descriptors: Not available

Data sources

1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.

DOI: 10.1186/s13321-016-0174-y

Chemical and Physical Properties

• Sensitivity: Light sensitive,Hygroscopic.
• Refractive Index: 1.4854
• Melt Point(°C): 37°C
• Molecular Weight: 482.200 g/mol
• Hydrogen Bond Donor Count: 13
• Hydrogen Bond Acceptor Count: 20
• Rotatable Bond Count: 0
• Exact Mass: 482 Da
• Monoisotopic Mass: 482 Da
• Topological Polar Surface Area: 190.000 Ų
• Heavy Atom Count: 24
• Formal Charge: 0
• Complexity: 62.200
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• Undefined Atom Stereocenter Count: 0
• Defined Bond Stereocenter Count: 0
• Undefined Bond Stereocenter Count: 0
• The total count of all stereochemical bonds: 0
• Covalently-Bonded Unit Count: 16

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