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Cobalt Aluminum Oxide

CAS 68186-86-7 · 20/100 · High conf.

Also registered as 8 other CAS numbers

160936-12-9 · 952441-16-6 · 1219711-24-6 · 1447840-03-0 · 1639836-38-6 · 1910076-02-6 · 2136320-10-8 · 1345-16-0

Concern score

20/100Minor concern based on regulatory listings.
High confidence

Cobalt Aluminum Oxide in plain language

What it is

On cosmetic ingredient lists it appears as “CI 77346”.

Also known as CI 77346 · C.I. Pigment Blue 28 · C.I. 77346 · Cobalt Aluminate Blue Spinel · Cobalt Blue · Cobalt Blue 660

Show all 11 names

Direct Blue 299 · Ferro V 3285 · King's Blue · cobalt aluminate blue · zinc cobalt aluminate

What it does

Used in cosmetics as a colourant. CI 77346 is classed chemically as an inorganic colour. It consists chiefly of cobaltous aluminate.

  • Colorant
  • Colourant
  • Conditioner
Is it a concern?
Minor concern: no hazard classifications on record. It is listed for cosmetic use in the EU.

What the listings say

Permitted, with conditions — Cobalt Aluminum Oxide appears on published "allowed" regulatory lists rather than on a restriction list.

Cobalt Aluminum Oxide is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

No restrictions found. Cobalt Aluminum Oxide appears in these published regulatory listings.

  • EU Annex IV — permitted colorant
  • EU permitted colorant

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • EUCosIngActive2 entries
    • CI 77346 is classed chemically as an inorganic colour. It consists chiefly of cobaltous aluminate. Restriction: IV/131Source →
    • Cosmetics Regulation annex IV / ref 131.Source →
  • EUECallowed_listedAnnex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products.
    • Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 124 composition records across product categories including Construction and building materials, Raw materials, Arts and crafts/office supplies. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, Dye, Pigment.
    • EPA CPDat observed this chemical in 124 composition records across product categories including Construction and building materials, Raw materials, Arts and crafts/office supplies. EPA CPDat classifies this chemical for functional uses including Softener and conditioner, Dye, Pigment.Source →

Expert safety opinions

No expert opinion on file for Cobalt Aluminum Oxide. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

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

4 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2020-08-14

    Open →
  • EPA Chemical and Products Database

    exposure · updated october 19, 2016

    Open →
  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

Suitability

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

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Cobalt Aluminum Oxide in a product composition. These are source records, not Greenveil catalog products.

Source records

124

Named organisations

6

Construction and building materialsRaw materialsArts and crafts/office suppliesIndustrial productsMedical/dentalHome maintenance

Typical roles

ColorantColourantConditioner
See products using Cobalt Aluminum Oxide →