Identification | More | [Name]
YELLOW IRON OXIDE | [CAS]
1309-33-7 | [Synonyms]
E 172 EISENOXID GELB FERRIC HYDROXY OXIDE FERRISPEC(R) PL COLOR YELLOW IRON OXIDE FERRISPEC(TM) GC GOETHITE IRON (III) ALPHA-OXYHYDROXIDE IRON (III) GAMMA-OXYHYDROXIDE IRON(III) HYDROXIDE IRON (III) HYDROXIDE, ALPHA IRON (III) HYDROXIDE, GAMMA IRON(III) HYDROXIDE OXIDE IRON(III) OXIDE, HYDRATED IRON OXIDE PIGMENT YELLOW IRON PIGMENT YELLOW YELLOW IRON OXIDE Fe(OH)3 Iron hydroxide (Fe(OH)3) ironhydroxide(fe(oh)3) irontrihydroxide | [EINECS(EC#)]
243-746-4 | [Molecular Formula]
FeHO2 | [MDL Number]
MFCD00064782 | [Molecular Weight]
88.85 | [MOL File]
1309-33-7.mol |
Hazard Information | Back Directory | [Chemical Properties]
brown flocculant precipitate; used in water purification, manufacturing pigments [HAW93] | [Definition]
YELLOW IRON OXIDE: a yellow-brown mineral,FeO.OH, crystallizing in the orthorhombicsystem. It is formed as aresult of the oxidation and hydrationof iron minerals or as a direct precipitatefrom marine or fresh water (e.g.in swamps and bogs). Most limoniteis composed largely of cryptocrystallinegoethite. Goethite is mined asan ore of iron. |
Questions And Answer | Back Directory | [Physical Properties]
Red-brown amorphous powder; density 3.40g/cm3; soluble in acids; insoluble in water and alcohol.
| [Uses]
The compound is used in pigments and in water purifications.
| [Preparation]
Iron(III) hydroxide is obtained as a brown gelatinous precipitate by adding a strong base to a solution of iron(III) salt:
FeCl3 + 3NaOH → Fe(OH)3 + 3NaCl
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