7783-50-8

Basic information

• Product Name: Iron(III) fluoride
• Synonyms: Ferric trifluoride;trifluoroiron;Iron fluoride;Iron fluoride (FeF3);Iron trifluoride
• CAS NO: 7783-50-8
• Molecular Formula: F₃Fe
• Molecular Weight: 112.85
• EINECS: 232-155-7
• Mol File: 7783-50-8.mol
• Article Data: 22

Chemical Properties

• Boiling Point: 19.5 °C at 760 mmHg
• Appearance: green powder
• Density: 3.87 g/cm³
• Vapor Pressure: 922mmHg at 25°C
• CAS DataBase Reference: Iron(III) fluoride(CAS DataBase Reference)
• NIST Chemistry Reference: Iron(III) fluoride(7783-50-8)
• EPA Substance Registry System: Iron(III) fluoride(7783-50-8)

Safety Data

• Hazardous Substances Data: 7783-50-8(Hazardous Substances Data)

Usage

General Description

Iron(III) fluoride is a chemical compound with the formula FeF3. It is a greyish-white solid that is highly soluble in water. Iron(III) fluoride is commonly used as a precursor for the preparation of other iron compounds and as a catalyst in chemical reactions. It is also used in the manufacturing of reagents, pharmaceuticals, and in the production of fluorides. Iron(III) fluoride has also been investigated for its potential applications in dental care and as a potential treatment for iron deficiency. It is important to handle iron(III) fluoride with care as it is toxic if ingested or inhaled, and proper safety procedures should be followed when working with this compound.

InChI:InChI=1/2FH.Fe/h2*1H;/q;;+2/p-2

Synthetic route

iron(III) oxide → iron(III) fluoride (7783-50-8)

Conditions	Yield
With F reaction of Fe2O3 with F on slight heating with flaming up; formation of FeF3;;

iron(III) oxide → iron(III) fluoride (7783-50-8)

Conditions	Yield
With F reaction of Fe2O3 with F on slight heating with flaming up; formation of FeF3;;

iron(III) oxide + ammonium hydrogen fluoride → iron(II) fluoride + iron(III) fluoride (7783-50-8) + hydrogen fluoride (7664-39-3) + nitrogen (7727-37-9) + ammonia (7664-41-7)

Conditions	Yield
In neat (no solvent) byproducts: H2O; heating up to 600°C; detd. by X-ray diffraction;

iron(III) oxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8) + water (7732-18-5)

iron(III) oxide + ammonium hydrogen fluoride → iron(II) fluoride + iron(III) fluoride (7783-50-8) + hydrogen fluoride (7664-39-3) + nitrogen (7727-37-9) + ammonia (7664-41-7)

Conditions	Yield
In neat (no solvent) byproducts: H2O; heating up to 600°C; detd. by X-ray diffraction;

chlorine (7782-50-5) + iron (7439-89-6) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heating (3 h, 400°C);

hydrogen fluoride (7664-39-3) + iron(III) chloride (7705-08-0) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) decompn. with gaseous HF, formation of FeF3;;
In neat (no solvent) reaction in coldness to amorphous FeF3; at 1000 °C formation of crystalline FeF3;;
In neat (no solvent) decompn. with gaseous HF, formation of FeF3;;

iron(III) chloride (7705-08-0) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With alkali fluoride In water byproducts: iron(III) fluoro anion;

iron(III) oxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8) + water (7732-18-5)

iron(III) chloride (7705-08-0) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) reaction of FeCl3 with F2 to FeF3 at elevated temp.;;
In not given reaction of FeCl3 with F2;;
In not given reaction of FeCl3 with F2;;
In neat (no solvent) reaction of FeCl3 with F2 to FeF3 at elevated temp.;;

iron(II) fluoride + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In water
In neat (no solvent) in Monel or glassy carbon or corundum vessel; at 100-370°C for 3h in F2 flow; elem. anal.;
In neat (no solvent) fluorination of mixt. of FeF2 and FeF3 with F2 (350 - 400°C);

chlorine (7782-50-5) + iron (7439-89-6) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heating (3 h, 400°C);

iron(III) oxide + ammonium hydrogen fluoride → iron(III) fluoride (7783-50-8)

Conditions	Yield
In solid byproducts: H2O, HF, NH3; react. product: (NH4)3FeF6 at 180°C, NH4FeF4 at 320°C, FeF3 at 430°C; XRD, IR, chem. anal.;

iron(III) oxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heated in a stream of HF;; contaminated by red oxyfluoride that can be removed by washing with warm dild. aq. HCl;;
In neat (no solvent) heated in a stream of HF;; contaminated by red oxyfluoride that can be removed by washing with warm dild. aq. HCl;;

hydrogen fluoride (7664-39-3) + iron(III) chloride (7705-08-0) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) decompn. with gaseous HF, formation of FeF3;;
In neat (no solvent) reaction in coldness to amorphous FeF3; at 1000 °C formation of crystalline FeF3;;
In neat (no solvent) decompn. with gaseous HF, formation of FeF3;;

iron(III) oxide + sulfur(VI) hexafluoride (2551-62-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) 710°C; elem. anal.;
710°C; elem. anal.;

iron(III) chloride (7705-08-0) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With alkali fluoride In water byproducts: iron(III) fluoro anion;

hydrogen fluoride (7664-39-3) + water (7732-18-5) + iron (7439-89-6) → iron(III) fluoride (7783-50-8) + iron(II) fluoride * 4 H2O

Conditions	Yield
In water hydrothermal synthesis;	A 0% B n/a

iron(II) oxide (1345-25-1) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With fluorine on slight warming of FeO and fluorine vigorous glowing and formation of iron fluoride;;

iron(III) chloride (7705-08-0) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) reaction of FeCl3 with F2 to FeF3 at elevated temp.;;
In not given reaction of FeCl3 with F2;;
In not given reaction of FeCl3 with F2;;
In neat (no solvent) reaction of FeCl3 with F2 to FeF3 at elevated temp.;;

xenon difluoride (13709-36-9) + iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) a mixt. of iron filings and XeF2 was heated at 500°C in a nickelvessel;

iron(II,III) oxide → iron(III) fluoride (7783-50-8)

Conditions	Yield
With fluorine In neat (no solvent) react. at dark red heat; formation of iron fluoride;;
With F2 In neat (no solvent) react. at dark red heat; formation of iron fluoride;;

iron(II) fluoride + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In water
In neat (no solvent) in Monel or glassy carbon or corundum vessel; at 100-370°C for 3h in F2 flow; elem. anal.;
In neat (no solvent) fluorination of mixt. of FeF2 and FeF3 with F2 (350 - 400°C);

iron(III) oxide + ammonium hydrogen fluoride → iron(III) fluoride (7783-50-8)

Conditions	Yield
In solid byproducts: H2O, HF, NH3; react. product: (NH4)3FeF6 at 180°C, NH4FeF4 at 320°C, FeF3 at 430°C; XRD, IR, chem. anal.;

iron boride + fluorine → iron(III) fluoride (7783-50-8) + boron trifluoride (7637-07-2)

iron(III) oxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heated in a stream of HF;; contaminated by red oxyfluoride that can be removed by washing with warm dild. aq. HCl;;
In neat (no solvent) heated in a stream of HF;; contaminated by red oxyfluoride that can be removed by washing with warm dild. aq. HCl;;

iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With H2O2 In hydrogen fluoride aq. HF; dissolving of pure iron powder in 48% HF, oxidatn. of the product by H2O2 in a strong acid medium;
fluorination of metallic Fe-powder;

hydrogen fluoride (7664-39-3) + iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With F2 In neat (no solvent) HF then F2-stream;

iron(III) oxide + sulfur(VI) hexafluoride (2551-62-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) 710°C; elem. anal.;
710°C; elem. anal.;

iron (7439-89-6) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With tungsten In neat (no solvent) byproducts: FeF2; in calorimetric bomb; iron combusted in fluorine; XRD; TG; elem.anal.; cromy.; calorimetry;
In not given reaction of Fe with F2;;
Fe-powder, F2/N2 for 3 d at 300°C, cooled, powdered, pure F2 for 2 d at 400°C;
In not given reaction of Fe with F2;;

iron(III) fluoride * 99 H2O + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heated in a stream of HF;; by washing with warm dild. aq. HCl contaminating red oxyfluoride can be removed;;
In neat (no solvent) heated in a stream of HF;; by washing with warm dild. aq. HCl contaminating red oxyfluoride can be removed;;

ferric hydroxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In hydrogen fluoride Fe(OH)3 dissolved in aq. HF and heated;; not isolated;;
In hydrogen fluoride aq. HF; Fe(OH)3 dissolved in aq. HF and heated;; not isolated;;

hydrogen fluoride (7664-39-3) + water (7732-18-5) + iron (7439-89-6) → iron(III) fluoride (7783-50-8) + iron(II) fluoride * 4 H2O

Conditions	Yield
In water hydrothermal synthesis;	A 0% B n/a

Iron(III) nitrate nonahydrate + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) at 500°C for 2 days; powder XRD;
In water excess of aq. HF, evapn. (60°C), slow dehydration (anhydrous HF stream, 750°C, 6 h);

iron(II) oxide (1345-25-1) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With fluorine on slight warming of FeO and fluorine vigorous glowing and formation of iron fluoride;;

iron(III) fluoride trihydrate + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heating (6 h, 750°C, HF stream);

iron(II) fluoride + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With nitric acid In water oxidized by HNO3 with excess of HF;; not isolated;;
With HNO3 In water oxidized by HNO3 with excess of HF;; not isolated;;

iron(III) fluoride * 99 H2O → iron(III) fluoride (7783-50-8)

Conditions	Yield
With ammonium fluoride; hydrogen fluoride In further solvent(s) FeF3*(x)H2O given into molten NH4F; heating in an inert gas stream gave an amorphous FeF3; heating in a stream of HF at 1000 °C formed crystals under partial sublimation;; contaminating red oxyfluoride can be removed by washing with warm dild. aq. HCl;;
With NH4F; HF In further solvent(s) FeF3*(x)H2O given into molten NH4F; heating in an inert gas stream gave an amorphous FeF3; heating in a stream of HF at 1000 °C formed crystals under partial sublimation;; contaminating red oxyfluoride can be removed by washing with warm dild. aq. HCl;;

xenon difluoride (13709-36-9) + iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) a mixt. of iron filings and XeF2 was heated at 500°C in a nickelvessel;

iron(III) fluoride trihydrate → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) byproducts: H2O; under HF stream, 750°C;
In neat (no solvent) at 120℃; for 48h;

iron(III) fluoride trihydrate + sulfur(VI) hexafluoride (2551-62-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) 650°C; elem. anal.;
650°C; elem. anal.;

iron(II,III) oxide → iron(III) fluoride (7783-50-8)

Conditions	Yield
With fluorine In neat (no solvent) react. at dark red heat; formation of iron fluoride;;
With F2 In neat (no solvent) react. at dark red heat; formation of iron fluoride;;

iron(II) fluoride + oxygen (80937-33-3) → iron(III) oxide + iron(III) fluoride (7783-50-8) + iron oxofluoride

Conditions	Yield
In solid dried oxygen passed for 30 min over FeF2 sample mounted in platinum device at 620-800°C; powder X-ray diffraction anal.;	A n/a B n/a C 0%

uranium hexafluoride (7783-81-5) → iron(III) fluoride (7783-50-8) + FeF3*U2F9 + UF(4-4.5)

Conditions	Yield
With steel corrosion of steel by UF6 at 120-400°C;
With steel corrosion of steel by UF6 at 120-400°C;

iron boride + fluorine → iron(III) fluoride (7783-50-8) + boron trifluoride (7637-07-2)

iron(II) fluoride + nitrogen(II) oxide (10102-43-9) → iron(III) fluoride (7783-50-8) + iron(III) oxide

Conditions	Yield
In neat (no solvent) byproducts: N2; heating in NO stream to 600°C; X-ray diffraction;

iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With H2O2 In hydrogen fluoride aq. HF; dissolving of pure iron powder in 48% HF, oxidatn. of the product by H2O2 in a strong acid medium;
fluorination of metallic Fe-powder;

hydrogen fluoride (7664-39-3) + iron (7439-89-6) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With F2 In neat (no solvent) HF then F2-stream;

iron(III) fluoride (7783-50-8) + tetraphenylphosphonium iodide (2065-67-0) → 2(C6H5)4P(1+)*{Fe2S12}(2-)=((C6H5)4P)2{Fe2S12}

Conditions	Yield
With H2S In methanol; triethylamine; N,N-dimethyl-formamide stirring mixt. of FeF3 and org. compd. in MeOH and DMF (2 min), addn. of Et3N, introduction of H2S (6 l/h); filtn., addn. of diethyl ether, standing (2-3 d, room temp., Ar atmosphere), filtn. washing (isopropanol, CS2 and Et2O), drying (air); elem. anal.;	52%

iron (7439-89-6) + fluorine (7782-41-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With tungsten In neat (no solvent) byproducts: FeF2; in calorimetric bomb; iron combusted in fluorine; XRD; TG; elem.anal.; cromy.; calorimetry;
In not given reaction of Fe with F2;;
Fe-powder, F2/N2 for 3 d at 300°C, cooled, powdered, pure F2 for 2 d at 400°C;
In not given reaction of Fe with F2;;

iron(III) fluoride * 99 H2O + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heated in a stream of HF;; by washing with warm dild. aq. HCl contaminating red oxyfluoride can be removed;;
In neat (no solvent) heated in a stream of HF;; by washing with warm dild. aq. HCl contaminating red oxyfluoride can be removed;;

ferric hydroxide + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In hydrogen fluoride Fe(OH)3 dissolved in aq. HF and heated;; not isolated;;
In hydrogen fluoride aq. HF; Fe(OH)3 dissolved in aq. HF and heated;; not isolated;;

hydrogenchloride (7647-01-0) + iron(III) fluoride (7783-50-8) → iron(III) chloride (7705-08-0)

Conditions	Yield
In neat (no solvent) byproducts: HF; heated in a stream of HCl at red heat;;

Iron(III) nitrate nonahydrate + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) at 500°C for 2 days; powder XRD;
In water excess of aq. HF, evapn. (60°C), slow dehydration (anhydrous HF stream, 750°C, 6 h);

iron(III) fluoride trihydrate + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) heating (6 h, 750°C, HF stream);

iron(II) fluoride + hydrogen fluoride (7664-39-3) → iron(III) fluoride (7783-50-8)

Conditions	Yield
With nitric acid In water oxidized by HNO3 with excess of HF;; not isolated;;
With HNO3 In water oxidized by HNO3 with excess of HF;; not isolated;;

iron(III) fluoride * 99 H2O → iron(III) fluoride (7783-50-8)

Conditions	Yield
With ammonium fluoride; hydrogen fluoride In further solvent(s) FeF3*(x)H2O given into molten NH4F; heating in an inert gas stream gave an amorphous FeF3; heating in a stream of HF at 1000 °C formed crystals under partial sublimation;; contaminating red oxyfluoride can be removed by washing with warm dild. aq. HCl;;
With NH4F; HF In further solvent(s) FeF3*(x)H2O given into molten NH4F; heating in an inert gas stream gave an amorphous FeF3; heating in a stream of HF at 1000 °C formed crystals under partial sublimation;; contaminating red oxyfluoride can be removed by washing with warm dild. aq. HCl;;

iron(III) fluoride (7783-50-8) + ethylenediamine (107-15-3) → ethylenediammonium iron(III) fluoride

Conditions	Yield
With hydrogen fluoride In water
With HF In water

iron(III) fluoride trihydrate → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) byproducts: H2O; under HF stream, 750°C;
In neat (no solvent) at 120℃; for 48h;

iron(III) fluoride trihydrate + sulfur(VI) hexafluoride (2551-62-4) → iron(III) fluoride (7783-50-8)

Conditions	Yield
In neat (no solvent) 650°C; elem. anal.;
650°C; elem. anal.;

Upstream product

• 7664-39-3 hydrogen fluoride 
• 7782-50-5 chlorine 
• 7439-89-6 iron 
• 7782-41-4 fluorine 
• 7705-08-0 iron(III) chloride 
• 2551-62-4 sulfur(VI) hexafluoride 
• 121714-78-1 iron(III) chloride hexahydrate 
• 94630-27-0 Na⁽¹⁺⁾*Mn⁽²⁺⁾*FeF₆^(3-)=NaMnFeF₆ 

Downstream Products

• 7664-39-3 hydrogen fluoride 
• 7439-89-6 iron 
• 7705-08-0 iron(III) chloride 
• 7553-56-2 iodine 
• 15843-42-2 ferric oxalate 
• 7783-40-6 magnesium fluoride 
• 1333-74-0 hydrogen 
• 13815-28-6 (NH4)3FeF6, high temperature, cubic 
• 15274-99-4 Na⁽¹⁺⁾*FeF₄^(1-)=NaFeF₄ 
• 7637-07-2 boron trifluoride 

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