Iron hydroxide oxide CAS #20344-49-4

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Iron hydroxide oxide CAS #20344-49-4

Ferric hydroxide (CAS 20344-49-4) is a brown or reddish brown powder. It has the following properties:
Density: 3.4 – 3.9 g/ml.
Melting point: 135°C.
Water solubility: soluble in water.
Stability: stable.
Ferric hydroxide can be used as a pigment, mainly for coloring paints, cement parts, building surfaces, plastics, and rubber. In addition, it can be used in the medical field to make drugs and can also be used as an antidote for arsenic.
In terms of chemical properties, ferric hydroxide is amphoteric, but its alkalinity is stronger than its acidity. Freshly prepared ferric hydroxide is easily soluble in inorganic and organic acids, and can also be soluble in hot concentrated alkali. It can react chemically with some substances, such as soluble iron salt solution plus ammonia precipitation to produce ferric hydroxide.
There are many methods for preparing ferric hydroxide. One common method is to react ferrous sulfate solution with sodium hydroxide solution to obtain ferrous hydroxide precipitate, which is then converted into ferric hydroxide by oxidation.

Category Dyestuffs And Pigments Tag Dyestuffs And Pigments

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Iron hydroxide oxide CAS #20344-49-4

Product Name:	Iron hydroxide oxide
Synonyms:	Ferric oxide hydroxide;Ferrous acid;Iron monohydroxide monooxide;Iron(III) hydroxide, ^y-phase;Iron(III) hydroxide, ^a-phase;Iron(III) hydroxide, gamma-phase;Iron(III)oxide,Ferric hydroxide oxide;Goethite,Ferric hydroxide oxide, Iron(III)oxide
CAS:	20344-49-4
MF:	FeHO2
MW:	88.85
EINECS:	243-746-4
Product Categories:	Metal and Ceramic Science;Oxides;Inorganics
Mol File:	20344-49-4.mol

Iron hydroxide oxide Chemical Properties

Melting point	135°C
density	3.4-3.9
RTECS	NO7400000
solubility	DMSO (Sparingly), Methanol (Slightly), Water (Soluble)
form	crystalline
color	Red-brown
Water Solubility	Soluble in mineral acids. Insoluble in water and ethanol.
Merck	14,4025
Exposure limits	ACGIH: TWA 1 mg/m3 NIOSH: TWA 1 mg/m3
Stability:	Stable.
CAS DataBase Reference	20344-49-4(CAS DataBase Reference)
NIST Chemistry Reference	iron(III) oxide hydroxide(20344-49-4)
EPA Substance Registry System	Iron hydroxide oxide (Fe(OH)O) (20344-49-4)

Safety Information

WGK Germany	–
TSCA	Yes

MSDS Information

Provider	Language
Iron hydroxide oxide	English

Iron hydroxide oxide Usage And Synthesis

Chemical Properties	reddish-brown crystalline solid
Uses	In purifying water; as absorbent in chemical processing; as pigment; as catalyst.
Uses	Iron(III) hydroxide, γ-phase is used in purifying water and as an absorbent in chemical processes. It is involved in the preparation of iron oxide-hydroxides nanoparticles, which is used as a very good adsorbent for lead removal from aquatic media. It is also used as a pigment, as a catalyst and in aquarium water treatment as a phosphate binder. Further, it is employed in the paints-lacquers-varnishes industry.
Preparation	A cold solution of 810 g of Fe(NO3)3?9H2O in two liters of water is poured slowly, with vigorous stirring, into an ammonia solution prepared by dissolving 120 g of gaseous NH3 in two liters of water (cooling necessary). The hydroxide which precipitates is amorphous to x-ray analysis. It is washed by stirring at least five times with eight-liter portions of cold water, each portion being decanted as completely as possible. The residual slurry is then stirred with sufficient cone. KOH solution to give a mixture approximately 2N and allowed to stand for 3-4 hours. Finally 100℃ steam is bubbled through for two hours. The precipitate is thereby transformed completely into bright-yellow α-FeO(OH), which shows a crystalline x-ray diffraction pattern.

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