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  • cleaning
  • food
  • industrial
  • pharma

Ferric oxide yellow

CAS 51274-00-1

Also registered as 24 other CAS numbers

1317-63-1 · 1342-51-4 · 12000-32-7 · 12001-03-5 · 50641-37-7 · 51109-85-4 · 53028-10-7 · 94809-98-0 · 99241-66-4 · 105478-30-6 · 131462-81-2 · 147625-38-5 · 164714-83-4 · 182761-12-2 · 185464-57-7 · 293726-56-4 · 622368-46-1 · 934248-40-5 · 1386410-48-5 · 1426820-85-0 · 2361021-60-3 · 2374151-12-7 · 2808427-70-3 · 2925159-69-7

Ferric oxide yellow chemical structure

Concern score

Not assessed — no hazard data yet.

Ferric oxide yellow in plain language

What it is

Also known as Yellow ochre · Yellow ferric oxide · Ferric oxide (hydrate) · Hydrated ferric oxide · Yellow iron oxide · C.I. Pigment Yellow 42

Show all 39 names

CI pigment yellow 42 and 43 · CI 77492 · C.I. 77492 · CI(1975) no. 77492 · E-172(III) · Ferric oxide hydrate · Ferric oxyhydroxide hydrate · Hydrated iron (iii) oxide · Hydrous ferric oxide · Ins NO.172(III) · INS-172(III) · Iron oxide yellow · Iron(iii) oxide-hydroxide monohydrate · Limonite · Mapico yellow · Natural yellow iron oxide · Pigment yellow 42 · Synthetic yellow iron oxide · iron(3+);oxygen(2-);hydroxide;hydrate · Ariabel Yellow 300407 · Bayferrox 3910 · Bayferrox 3920 · Bayferrox 3950 · Bayferrox 415 · Bayferrox 420 · Bayferrox 915 · Bayferrox 920 · Brown pigment · Ec 257-098-5 · Ferrox · Iox y 02 · Iron Hydroxide Oxide Yellow · UNII-EX438O2MRT

What it does

Used in consumer products as a colourant and a fragrance ingredient.

  • Colourant
  • Fragrance
Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Ferric oxide yellow appears in these published regulatory listings.

  • Inactive ingredient in US drugs

Recorded in these product areas

  • Found in consumer products
  • Cleaning
  • Industrial
  • USFDAinactive ingredient database21 entries — 4 administration routes
    • Route: BUCCAL; Dosage form: TABLET; Maximum daily exposure: 1 mgSource →
    • Route: ORAL; Dosage form: CAPSULE; Maximum daily exposure: 14 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, COATED; Potency: 0.01 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, COATED, EXTENDED RELEASE; Potency: NASource →
    • Route: ORAL; Dosage form: CAPSULE, DELAYED RELEASE; Maximum daily exposure: 3 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, EXTENDED RELEASE; Maximum daily exposure: 7 mgSource →
    • Route: ORAL; Dosage form: CAPSULE, LIQUID FILLED; Maximum daily exposure: 1 mgSource →
    • Route: ORAL; Dosage form: GRANULE, FOR SUSPENSION; Maximum daily exposure: 11 mgSource →
    • Route: ORAL; Dosage form: POWDER, FOR SUSPENSION; Maximum daily exposure: 3 mgSource →
    • Route: ORAL; Dosage form: SUSPENSION; Maximum daily exposure: 6 mgSource →
    • Route: ORAL; Dosage form: TABLET; Maximum daily exposure: 24 mgSource →
    • Route: ORAL; Dosage form: TABLET, CHEWABLE; Maximum daily exposure: 14 mgSource →
    • Route: ORAL; Dosage form: TABLET, COATED; Maximum daily exposure: 1 mgSource →
    • Route: ORAL; Dosage form: TABLET, DELAYED RELEASE; Maximum daily exposure: 7 mgSource →
    • Route: ORAL; Dosage form: TABLET, EXTENDED RELEASE; Maximum daily exposure: 15 mgSource →
    • Route: ORAL; Dosage form: TABLET, FILM COATED; Maximum daily exposure: 4 mgSource →
    • Route: ORAL; Dosage form: TABLET, ORALLY DISINTEGRATING; Maximum daily exposure: 2 mgSource →
    • Route: ORAL; Dosage form: TABLET, ORALLY DISINTEGRATING, DELAYED RELEASE; Maximum daily exposure: 2 mgSource →
    • Route: RESPIRATORY (INHALATION); Dosage form: POWDER; Potency: 0.04 mgSource →
    • Route: SUBLINGUAL; Dosage form: TABLET; Potency: 1 mgSource →
    • Route: BUCCAL; Dosage form: FILM; Potency: 0.27 mgSource →
  • USFDAlisted in openFDA substance2 entries
    • openFDA substance registry classifies this ingredient as chemical.Source →
    • openFDA substance registry classifies this ingredient as concept.Source →
  • GLOBALJECFAEvaluatedJECFA evaluation record.
  • USEPAcommercial use observedEPA CPDat observed this chemical in 635 composition records across product categories including Construction and building materials, Furniture and furnishings, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Dye, Pigment, No specific technical function.
    • EPA CPDat observed this chemical in 635 composition records across product categories including Construction and building materials, Furniture and furnishings, Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Dye, Pigment, No specific technical function.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • JECFA

    Joint FAO/WHO Expert Committee on Food Additives

  • EFSA

    European Food Safety Authority

    No EFSA opinion on file.

Evidence & sources

No graded research studies for Ferric oxide yellow yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated november 3, 2016

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA Inactive Ingredient Database

    regulatory · updated 2026-01-09

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • WHO JECFA Database

    regulatory · updated 2026-10-04

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →
Reference links (1)
Openfda substance

en.wikipedia.org

Read →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

How often EPA CPDat has listed Ferric oxide yellow in a product composition. These are source records, not Greenveil catalog products.

Source records

635

Named organisations

6

Construction and building materialsFurniture and furnishingsCleaning products and household careHome maintenanceRaw materialsArts and crafts/office supplies

Typical roles

ColourantFragrance
See products using Ferric oxide yellow →

Catalog

Found in these products

Their ingredient lists include Ferric oxide yellow; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 682 →Find products without it →

Co-occurrence

Often appears with

Ingredients that frequently appear alongside Ferric oxide yellow in the catalog.