1310-14-1

Basic information

• Product Name: YELLOW IRON OXIDE
• Synonyms: Goethite: (Iron hydroxide oxide);Einecs 215-176-6;GOETHITE;IRON OXIDE PIGMENT YELLOW;IRON(III) OXIDE, HYDRATED;IRON (III) GAMMA-OXYHYDROXIDE;IRON (III) HYDROXIDE, ALPHA;IRON(III) HYDROXIDE
• CAS NO: 1310-14-1
• Molecular Formula: FeHO2
• Molecular Weight: 88.85
• EINECS: 243-746-4
• Mol File: 1310-14-1.mol
• Article Data: 10

Chemical Properties

• Melting Point: 350°C
• Appearance: /crystalline
• Density: 3.8-4.4 g/cm3
• Stability: Stable.
• CAS DataBase Reference: YELLOW IRON OXIDE(CAS DataBase Reference)
• NIST Chemistry Reference: YELLOW IRON OXIDE(1310-14-1)
• EPA Substance Registry System: YELLOW IRON OXIDE(1310-14-1)

Safety Data

• Hazardous Substances Data: 1310-14-1(Hazardous Substances Data)

Usage

Description

Goethite is typically formed under oxidizing conditions as a weathering product of femferous minerals, siderite, pyrite, and magnetite, and is widespread as deposits in bogs. It is commonly associated with hematite, pyrolusite, manganite, calcite, quartz, lepidocrocite, clay minerals, and limonite. Hydrous iron oxide is also called limonite. By x-ray examination, most limonites are actually cryptocrystalline goethite with absorbed or capillary water (Palache, Berman, and Frondel 1944). Several excellent pigment ore sources are found in India. Domestic ochre is mined in Georgia and Virginia.

Physicochemical properties

Chemical formula αFeOOH.xH20 Chemical composition of ore 50% to 88% Fe203, 9% to 10% H20, balance silicate or clay minerals Crystal class Orthorhombic; dipyramidal Habit Prismatic and striated; also in tablets or scales, grading into acicular and long prismatic forms; also earthy Physical Cleavage [010] perfect, [100] less so, fracture uneven, hardness of 5.0-5.5 Reaction mechanisms Will form ferrites through solid-state reactions as noted under hemotite. Can also be converted from αFeOOH.xH20 to αFesO3 by heat and to ferromagnetic γfe2O3 by reduction and oxidation. Melting point Decomposes; naturals (finely ground) start to dehydroxylate at 190°C and is essentially dehydroxylated at 320°C; synthetics start at 180°C and are completely dehydroxylated at 300°C Boiling point Decomposes Solubility Considered insoluble in water and common organic solvents, 0.0015 gpl cold water Index of refraction 2.26-2.27 Specific gravity 3.3-4.0 Magnetic Antiferromagnetic

Chemical formula

αFeOOH.xH20

Chemical composition of ore

50% to 88% Fe203, 9% to 10% H20, balance silicate or clay minerals

Crystal class

Orthorhombic; dipyramidal

Habit

Prismatic and striated; also in tablets or scales, grading into acicular and long prismatic forms; also earthy

Physical

Cleavage [010] perfect, [100] less so, fracture uneven, hardness of 5.0-5.5

Reaction mechanisms

Will form ferrites through solid-state reactions as noted under hemotite. Can also be converted from αFeOOH.xH20 to αFesO3 by heat and to ferromagnetic γfe2O3 by reduction and oxidation.

Melting point

Decomposes; naturals (finely ground) start to dehydroxylate at 190°C and is essentially dehydroxylated at 320°C; synthetics start at 180°C and are completely dehydroxylated at 300°C

Boiling point

Decomposes

Solubility

Considered insoluble in water and common organic solvents, 0.0015 gpl cold water

Index of refraction

2.26-2.27

Specific gravity

3.3-4.0

Magnetic

Antiferromagnetic

Chemical Properties

solid

InChI:InChI=1/Fe.H2O.O/h;1H2;/q+1;;/p-1/rFeHO2/c2-1-3/h2H

Upstream product

• 7732-18-5 water 
• 1310-73-2 sodium hydroxide 
• 20344-49-4 γ-FeO(OH) 
• 7722-84-1 dihydrogen peroxide 
• 80937-33-3 oxygen 

Relevant articles and documents

H2S-Scavenged and Activated Iron Oxide-Hydroxide Nanospindles for MRI-Guided Photothermal Therapy and Ferroptosis in Colon Cancer

Overproduced hydrogen sulfide (H2S) is of vital importance for the progress of colon cancer and promotes cancer cellular proliferation. Devising pharmacological nanomaterials for tumor-specific H2S activation will be significant for precise colon cancer treatment. Herein, a biocompatible fusiform iron oxide-hydroxide nanospindles (FeOOH NSs) nanosystem for magnetic resonance imaging (MRI), ferroptosis, and H2S based cascade reaction-enhanced combinational colon cancer treatment is developed. The FeOOH NSs can effectively scavenge endogenous H2S via the reduction reaction to prohibit the growth of CT26 colon cancer. The cascade produced FeS driven by overexpressed H2S exhibits near-infrared-triggered photothermal therapy capability and Fe2+-mediated ferroptosis functionality. Meanwhile, the as-prepared FeOOH NSs can light up tumor tissues as a potent MRI contrast agent. Additionally, FeOOH NSs present desirable biosafety in a murine model for up to three months and avoid any long-term toxicity. Furthermore, it is found that these H2S-responsible nanotheranostics do not cause any cure effects on other cancer types, such as 4T1 breast cancer. Overall, the findings illustrate that the biocompatible FeOOH NSs can be successfully employed as a theranostic for specifically treating colon cancer, which may promote the clinical translation and development of H2S-responsive nanoplatforms.

Confirmation of the assignment of vibrations of goethite: An ATR and IES study of goethite structure

(Graph Presented) Transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM/EDS) and X-ray diffraction (XRD) were used to characterize the morphology of synthetic goethite. The behavior of the hydroxyl/water molecular units of goethite and its thermally treated products were characterized using Fourier transform-infrared emission spectroscopy (FT-IES) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. The results showed that all the expected vibrational bands between 4000 and 650 cm-1 including the resolved bands (3800-2200 cm -1) were confirmed. A band attributed to a new type of hydroxyl unit was found at 3708 cm-1 and assigned to the FeO-H stretching vibration without hydrogen bonding. This hydroxyl unit was retained up to the thermal treatment temperature of 500°C. On the whole, seven kinds of hydroxyl units, involving three surface hydroxyls, a bulk hydroxyl, a FeO-H without hydrogen bonding, a nonstoichiometric hydroxyl and a reversed hydroxyl were observed, and three kinds of adsorbed water were found in/on goethite.

Synthesis, crystal, and magnetic structures of the sodium ferrate (IV) Na4FeO4 studied by neutron diffraction and Moessbauer techniques

The alkali sodium ferrate (IV) Na4FeO4 has been prepared by solid-state reaction of sodium peroxide Na2O2 and wustite Fe1-xO, in a molar ratio Na/Fe=4, at 400°C under vacuum. Powder X-ray and neutron diffraction studies indicate that Na4FeO4 crystallizes in the triclinic system P-1 with the cell parameters: a=8.4810(2) A, b=5.7688(1) A, c=6.5622(1) A, α=124.662(2)°, β=98.848(2)°, γ=101.761(2)° and Z=2. Na4FeO4 is isotypic with the other known phases Na4MO4 (M=Ti, Cr, Mn, Co and Ge, Sn, Pb). The solid solution Na4FexCo1-xO4 exists for x=0-1 and we have followed the evolution of the cell parameters with x to determine the lattice parameters of the triclinic cell of Na4FeO4. A three-dimensional network of isolated FeO4 tetrahedra connected by Na atoms characterizes the structure. This compound is antiferromagnetic below TN=16 K. At 2 K the magnetic cell is twice the nuclear cell and the magnetic structure is collinear (μFe=3.36(12) μB at 2 K). This black compound is highly hygroscopic. In water or on contact with the atmospheric moisture it is disproportionated in Fe3+ and Fe6+. The Moessbauer spectra of Na4FeO4 are fitted with one doublet (δ=-0.22 mm/s, Δ=0.41 mm/s at 295 K) in the paramagnetic state and with a sextet at 8 K. These parameters characterize Fe4+ highspin in tetrahedral FeO4 coordination.

Influence of metal ions on the transformation of γ-FeOOH into α-FeOOH

The transformation of γ-FeOOH into α-FeOOH in FeSO4 solutions at 50°C was investigated in two different ways by dissolving Ti(IV), Cr(III), Cu(II), Ni(II), and Mn(II) in the solutions at atomic ratios of metal/Fe of 0-0.1 and adding these metal ions to th

New method for preparing imatinib intermediate

The invention discloses a new method for preparing an imatinib intermediate N-(5-amino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidinamine. The method comprises the following steps: stirring, refluxing and reacting FeCl3.6H2O and sodium hydroxide in an aqueous solution with the pH value of 7.0-8.0 at 100DEG C for 12, carrying out pumping filtration, drying the obtained solid in an oven to obtain a required catalyst FeO(OH), and reducing a nitro group in N-(5-nitro-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidinamine with FeO(OH) as a catalyst and hydrazine hydrate as a reducing agent to generate N-(5-amino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidinamine. The method for preparing N-(5-amino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidinamine has the advantages of easily available raw materials, simple operation, high total yield of the above reaction, and is a synthesis route suitable for industrially producing N-(5-amino-2-methylphenyl)-4-(3-pyridyl)-2-pyrimidinamine.