氧化铁黄

Description

Iron (III) oxide monohydrate · CAS 51274-00-1 · FeH3O3. UNII EX438O2MRT.

Identification

CAS Registry Number	51274-00-1
PubChem CID	23320441
Molecular formula	FeH3O3
IUPAC name	iron(3+);oxygen(2-);hydroxide;hydrate
UNII (FDA)	EX438O2MRT

Computed Descriptors

Molecular Weight	106.87
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	0
Exact Mass	106.943154
Monoisotopic Mass	106.943154
Topological Polar Surface Area	3
Heavy Atom Count	4
Formal Charge	0
Complexity	0

Physical description & handling notes

• Liquid; Wet Solid; Other Solid; Dry Powder; Large Crystals; Other Solid; Liquid; Other Solid; Dry Powder; Other Solid; Liquid; Dry Powder; Large Crystals; Liquid; Wet Solid; Dry Powder; CBI
• Yellow odorless powder; Insoluble in water; [Rockwood Pigments MSDS]

Regulatory Status

Regulatory & Food Contact	COLOUR: Food Additives CI PIGMENT YELLOW 42 AND 43 JECFA ADI: 0-0.5 mg/kg bw TRS 648-JECFA 23/13 FAS 6/NMRS 54A-JECFA 18/100 (1974) IRON OXIDE YELLOW
GHS notification summary	99.7% (903 / 906)

GHS Hazard Classification

GHS notification summary	99.7% (903 / 906)

Documented Uses

• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Food Additives -> COLOUR -> JECFA Functional Classes
• Not Known or Reasonably Ascertainable
• Information on 48 consumer products that contain Iron(III) oxide monohydrate (yellow pigment) in the following categories is provided:
• 2023: 40,000,000 - <55,000,000 lb
• 2022: 70,000,000 - <85,000,000 lb

Synonyms

Ferric oxide Yellow; EX438O2MRT; C.I. 77492; RefChem:1080569; DTXSID2029371; 51274-00-1; Yellow iron oxide; Ferric oxide, yellow; Bayferrox 920; UNII-EX438O2MRT; Iron hydroxide oxide yellow; Ferric oxide, yellow [NF]; CCRIS 4378; iron(3+);oxygen(2-);hydroxide;hydrate; EINECS 257-098-5; MAPICO YELLOW

Frequently Asked Questions

What are the CAS number and molecular formula of Iron (III) oxide monohydrate?

CAS 51274-00-1; molecular formula FeH3O3; molecular weight — g/mol.

What other names is Iron (III) oxide monohydrate known by?

Ferric oxide Yellow, EX438O2MRT, C.I. 77492, RefChem:1080569, DTXSID2029371, 51274-00-1.

What is the regulatory status of Iron (III) oxide monohydrate?

Documented regulatory listings: COLOUR: Food Additives; CI PIGMENT YELLOW 42 AND 43; JECFA ADI: 0-0.5 mg/kg bw.

Is Iron (III) oxide monohydrate classified as hazardous?

99.7% of GHS notifications report no hazard classification (903 of 906).

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.