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Cobalt

CAS 7440-48-4 · 100/100 · High conf.

Also registered as 7 other CAS numbers

132965-60-7 · 177256-35-8 · 184637-91-0 · 195161-79-6 · 335349-43-4 · 1245817-40-6 · 1262528-32-4

Cobalt chemical structure

Concern score

100/100Critical concern based on regulatory listings.
High confidence

Cobalt in plain language

What it is

Also known as Cobalt and cobalt compounds · Elemental cobalt · Aquacat · C.I. 77320 · CI 77320 · Co

Show all 27 names

Cobalt element · Cobalt metal dust · Cobalt metal fume · Cobalt metal powder · Cobalt(2+) ion · Cobalt(II) · Cobalt-59 · Dietary Cobalt · Kobalt · NCI-C60311 · Super cobalt · Un 3178 · cobalt (sara 313) · cobalt (sara 313) sulfate · cobalt (sara iii) · cobalto · cobaltum · lambda2-cobalt(2+) ion · Cobaltum metallicum · cobalt (sara 313) cmpds (as co) · cobalt compounds (as co)(sara 313)

What it does

Used in consumer products as a colourant.

  • Colourant
Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

Cobalt is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — banned

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

Restrictions first, then routine listings from published regulatory sources.

  • EU Annex II — prohibited
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial

  • EUEC

    Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

    banned
    View source →
  • EUCosIngActiveCosmetics Regulation annex II / ref 1645.
    • Cosmetics Regulation annex II / ref 1645.Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 3562 composition records across product categories including Construction and building materials, Furniture and furnishings, Batteries. EPA CPDat classifies this chemical for functional uses including tile body, Degradant/impurity, improve tensile strength.
    • EPA CPDat observed this chemical in 3562 composition records across product categories including Construction and building materials, Furniture and furnishings, Batteries. EPA CPDat classifies this chemical for functional uses including tile body, Degradant/impurity, improve tensile strength.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Cobalt. 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 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

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2021-06-21

    Open →

  • EPA Chemical and Products Database

    exposure · updated may 31, 2017

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

  • PubChem Live Enrichment

    chemistry · updated 2026-05-17

    Open →

Suitability

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

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 in a product composition. These are source records, not Greenveil catalog products.

Source records

3,562

Named organisations

6

Construction and building materialsFurniture and furnishingsBatteriesLaboratory suppliesHome maintenanceManufacturing Components

Typical roles

Colourant
See products using Cobalt →

Catalog

Found in these products

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

See all 16 →Find products without it →