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CI 18820

CAS 1082649-85-1 · 20/100 · High conf.

Also registered as 14 other CAS numbers

1217226-64-6 · 4692-37-9 · 35772-90-8 · 77107-21-2 · 84875-67-2 · 98249-01-5 · 115133-45-4 · 642458-21-7 · 1007521-14-3 · 1089713-15-4 · 1173011-33-0 · 1174554-58-5 · 1185242-62-9 · 6359-82-6

Concern score

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

CI 18820 in plain language

What it is

Also known as Acid yellow 11 · C.I. Acid Yellow 11, sodium salt · C.I. 18820 · C.I. acid yellow 11 · Ext d & c yellow 3 · Acid Brilliant Yellow G

Show all 8 names

Acid Yellow 11, sodium salt · Flavazin L

What it does

Used in cosmetics as a colourant. CI 18820 is classed chemically as a monoazo colour.

  • Colorant
  • Colourant
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 — CI 18820 appears on published "allowed" regulatory lists rather than on a restriction list.

Sodium 4-(3-hydroxy-5-methyl-4-phenylazopyrazol-2-yl)benzenesulphonate 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. CI 18820 appears in these published regulatory listings.

  • EU Annex IV — permitted colorant
  • EU permitted colorant

Recorded in these product areas

  • Found in consumer products
  • Cleaning
  • EUCosIngActive2 entries
    • CI 18820 is classed chemically as a monoazo colour. It conforms to the formula: Restriction: IV/42Source →
    • Cosmetics Regulation annex IV / ref 42.Source →
  • EUECallowed_listedAnnex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off products
    • Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off productsSource →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 1 composition records across product categories including Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Dye.
    • EPA CPDat observed this chemical in 1 composition records across product categories including Cleaning products and household care. EPA CPDat classifies this chemical for functional uses including Dye.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 CI 18820. 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 CI 18820 yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 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 march 17, 2016

    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 →

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 CI 18820 in a product composition. These are source records, not Greenveil catalog products.

Source records

1

Named organisations

3

Cleaning products and household care

Typical roles

ColorantColourant
See products using CI 18820 →