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Basic information

  • Name:

  • FERROIN

  • CAS No.:

  • 14634-91-4

  • Formula:
  • C36H24FeN6O4S
  • Synonyms:
  • M/40-FERROIN;FERROIN;FERROIN INDICATOR;FERROIN INDICATOR SOLUTION;1,10-PHENANTHROLINE IRON(II) SALT;1,10-PHENANTHROLINE IRON (II) SULFATE;1,10-PHENANTHROLINE IRON(I) SULFATE COMPLEX;1,10-Phenanthroline ferrous

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Chemistry

Ferroin(14634-91-4) is the blood-red complex with the formula [Fe(o-phen)3]SO4, where o-phen is an abbreviation for 1,10-phenanthroline. Ferroin(14634-91-4) changes from red to pale blue when oxidized. Its redox potential is +1.06 volts in 1M H2SO4.
Density: 0.999 g/mL at 25 ℃.
Molar mass: 596.27 g/mol.
Chemical structure:

Uses

Ferroin(14634-91-4) is used as an redox indicator in analytical chemistry. [Fe(o-phen)3]2+ ion is the active ingredient, and it is the redox-active chromophore. It includes other salts of the same basic dication. It can be prepared for ferroin indicator solution. It cannot be used as an indicator in perchloric acid medium because of precipitation of ferroin perchlorate.

Production

A solution of 1.485 g 1,10-phenanthroline monohydrate is added to a solution of 695 mg FeSO4.7H2O in water, and the resulting red solution is diluted to 100 mL.
Ferroin sulfate may be prepared simply by adding phenanthroline to ferrous sulfate in water.
          3 phen + FeSO4 → [(o-phen)3Fe]SO4 .

Safety Profile

Ferroin(14634-91-4) is harmful to aquatic organisms. It may cause long-term adverse effects in the aquatic environment. It is irritant to skin and eye, so it should avoid contacting with skin and eyes. It is hazardous to lungs, mucous membranes, liver. This material and its container must be disposed of as hazardous waste.

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