Fe2O3
159.69 g/mol
Dye & PigmentWarning
Iron trioxide
CAS1309-37-1EC616-935-8
Category
Dye & Pigment
Compound Class
Inorganic Salt
Primary Use
Pigment in paints and coatings
Iron trioxide is an inorganic compound that serves as a pigment in paints and coatings. Its primary industrial significance stems from its use as a coloring agent in various materials.
Pigment in paints and coatingsAbrasive in jeweler's rougeComponent in magnetic tapes
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
Ferric chloride
CAS7705-08-0
Industrial and laboratory reagent
StrongSame Parent
Molysite
CAS12040-57-2
industrial chemical
ReferenceSame Category
2-Amino-4,8-naphthalenedisulfonic acid
CAS131-27-1
Dye intermediate
ReferenceSame Category
Anatase
CAS1317-70-0
White pigment in paints and coatings
ReferenceSame Category
Rutile
CAS1317-80-2
White pigment in paints and coatings
ReferenceSame Category
Iron phthalocyanine
CAS132-16-1
Phthalocyanine dye and pigment
Safety Reference
Warning
H319Causes serious eye irritation
H411Toxic to aquatic life with long lasting effects
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for Iron trioxide (CAS 1309-37-1) is 2821.10, 3206.49.
HS code (international, 6-digit)
2821.10, 3206.49
EU CN code (8-digit)
2821 10 00, 3206 49 70
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
oxo(oxoferriooxy)iron
InChIKey
JEIPFZHSYJVQDO-UHFFFAOYSA-N
SMILES
O=[Fe]O[Fe]=O
Synonyms (89)
- 11554 Red
- Anchred standard
- Anhydrous Ferric Oxide
- Anhydrous Iron (III)
- Anhydrous Iron (III) Oxide
- Anhydrous iron oxide
- Anhydrous oxide of iron
- Armenian bole
- Bayer S 11
- Bayferrox 105M
- Black oxide of iron
- COSMETIC RED OXIDE
- Calcotone Red
- Caput mortuum
- Colcothar
- Crocus martis adstringens
- Deanox
- E 172 RED
- Eisen(III)-oxid
- Eisenoxyd
- Eisentrioxid
- English Red
- Ferric Oxide
- Ferric Oxide Red
- Ferric oxide (anhydrous)
- Ferric oxide (colloidal)
- Ferric sesquioxide
- Ferrugo
- Ferrum Oxydatum
- Hematite 8124
- Hematite mineral
- Indian Red
- Iron Red
- Iron oxide (Fe2O3)
- Iron oxide,
- Iron oxide, red
- Iron sesquioxide
- Iron trioxide
- Iron(III) Oxide Nanowires
- Iron(III) oxide (99.995%-Fe)
- Iron(III) oxide, dispersion
- Iron(III) oxide, purified
- Iron(III)oxidemono hydrate
- Jeweler's rouge
- Levanox Red 130A
- Light Red
- Maghemite (Fe2O3)
- Mapico Red
- Mars Brown
- Mars Red
- Natural Red Oxide
- Natural hematite
- Ochre
- Prussian Brown
- Quick rouge
- RED IRON OXIDE R 1599D
- Raddle
- Red Ferric Oxide
- Red Iron Oxide
- Red oxide
- Red oxide D3452
- Red oxide D6984
- Red oxide of iron
- Rouge
- Rubigo
- Sienna
- Sienna brown
- Specular iron
- Stone Red
- Supra
- Vitriol Red
- Vogel's Iron Red
- Yellow ferric oxide
- Yellow oxide of iron
- Zelaza tlenki
- Zelaza tlenki [Polish]
- iron (III) oxide
- iron(3+) oxide
- oxo(oxoferriooxy)iron
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