Iron Oxide

Description

Iron Oxide · CAS 1309-37-1 · Fe2O3. UNII 1K09F3G675. Melting Point: 1565 °C; Density: 5.25.

Identification

CAS Registry Number	1309-37-1
PubChem CID	14833
Molecular formula	Fe2O3
IUPAC name	bis(iron(3+));tris(oxygen(2-))
UNII (FDA)	1K09F3G675

Computed Descriptors

Molecular Weight	159.69
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	159.854615
Monoisotopic Mass	159.854615
Topological Polar Surface Area	3
Heavy Atom Count	5
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Melting Point	1565 °C
Density	5.25

Physical description & handling notes

• Large Crystals; Dry Powder
• Brilliant black to blackish red or brick red mineral, brown to cherry red streak and metallic to dull luster /Hematite, red/
• Red-brown hexagonal crystals
• Insol in water; sol in hydrochloric acid, sulfuric acid; slightly sol in nitric acid
• Index of refraction: 3.19, 2.91 (LI)
• Mohs hardness about 6; specific gravity: 4.9-5.3 /Hematite, red/

Regulatory Status

GHS notification summary	88% (402 / 457)

GHS Hazard Classification

GHS notification summary	88% (402 / 457)
Reported hazard statements	H315 (12%), H318 (12%)

Documented Uses

• The most important ore of iron. Also, certain varieties are used as paint pigments and for rouge.
• Ore- raw material for iron; pigment for ceramics, paint, rubber, paper, & linoleum; chem intermediate for ferrites; polishing agent for glass, precious metals, & diamonds; component in electrical resistors, semiconductors, magnets & magnetic tapes; catalyst
• Plastics -> Typical concentration range in plastic materials -> 1%
• Plastics -> Polymer Type -> Polyolefin-I; PUR; Polyolefin-II; PVC (soft); ABS; PVC (rigid); PET; PMMA; PA; PC; (E)PS
• Information on 1 consumer products that contain Hematite in the following categories is provided:
• Occurs naturally as the mineral hematite; produced synthetically by calcining iron salts such as ferrous sulfate, ferric alums, or organic iron salts under oxidizing conditions (the iron compound used and the reaction conditions determine the color of the pigments)

Synonyms

HEMATITE; Iron ore; Raphisiderite; Haematite; Blood stone; Oligist; Miox; Iron, specular; Red Iron ORE; RefChem:922799; DTXSID7049637; CHEBI:50818; 215-275-4; 1317-60-8; Hematite (Fe2O3); iron(3+);oxygen(2-)

Frequently Asked Questions

What are the CAS number and molecular formula of Iron Oxide?

CAS 1309-37-1; molecular formula Fe2O3; molecular weight — g/mol.

What other names is Iron Oxide known by?

HEMATITE, Iron ore, Raphisiderite, Haematite, Blood stone, Oligist.

Is Iron Oxide classified as hazardous?

88% of GHS notifications report no hazard classification (402 of 457).

What are the key physical properties of Iron Oxide?

Melting Point: 1565 °C; Density: 5.25.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.