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CAS No.: | 14634-91-4 | ||||||
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Name: | FERROIN | ||||||
Article Data: | 17 | ||||||
Molecular Structure: | |||||||
Formula: | C36H24FeN6O4S | ||||||
Molecular Weight: | 692.537 | ||||||
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 | ||||||
Density: | g/cm3 | ||||||
Boiling Point: | 365.1°Cat760mmHg | ||||||
Flash Point: | 164.8°C | ||||||
Appearance: | dark red liquid | ||||||
Hazard Symbols: | N | ||||||
Risk Codes: | 52/53-51/53 | ||||||
Safety: |
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PSA: | 165.98000 | ||||||
LogP: | 8.08930 |
Conditions | Yield |
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In ethanol; water in situ react.; | |
In methanol; water not isolated; |
Conditions | Yield |
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In water FeSO4 and phenanthroline reacted in a 1:3 stoichiometric relationship; | |
In water added excess of FeSO4*7H2O; not isolated; investigated by Photoelectron Emission Spectroscopy; | |
In water |
Conditions | Yield |
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In not given |
Conditions | Yield |
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In water 1,10-phenanthroline added in 1,10-phenanthroline:Fe ratio of ca. 3:1 todeaerated Fe(2+) soln.; |
Conditions | Yield |
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FeS:1,10-phenanthroline, molar ratio 1:3; | |
In water Prepn. by dissolving stoich. amts. of starting compds. in pure H2O.; | |
In sulfuric acid stoichiometric amounts; filtered; | |
In not given | |
In water |
ferroin
Conditions | Yield |
---|---|
With Na2SO4 In water addn of pptd. educt to water contg. anion exchange resin (equilibrated with Na2SO4); not isolated, spectrophotometric control; |
ferroin
dicyanobis(1,10-phenanthroline)iron(II)
Conditions | Yield |
---|---|
With potassium cyanide In water Fe salt aq. soln. heating nearly boiling, aq. KCN adding at once, stirring, cooling to room temp., dark violet crystals collecting, drying in vacuo; identified by IR, UV spectra; | 90% |
ferroin
Fe(C12H8N2)3(2+)*Ni(S2C2(CN)2)2(2-) = [Fe(C12H8N2)3][Ni(S2C2(CN)2)2]
Conditions | Yield |
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In methanol; water byproducts: Na2SO4; stirring (20 min); filtration, washing (water/ethanol), drying in air; elem. anal.; | 50% |
ferroin
1,3-benzenedisulfonic acid disodium salt
Conditions | Yield |
---|---|
With water In water recrystd. twice from water, air-dried at room temp., water of crystn. determined by Karl-Fischer method; |
ferroin
disodium 2,6-naphthalenedisulfonate
Conditions | Yield |
---|---|
With water In water recrystd. twice from water, air-dried at room temp., water of crystn. determined by Karl-Fischer method; |
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:
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 .