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Annex IV Entry 63 14/08/2020

Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

CI 42090/ ACID BLUE 9; ACID BLUE 9 AMMONIUM SALT; ACID BLUE 9 ALUMINUM LAKE

Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt appears in Annex IV as a positive-list colorant entry for EU cosmetics.

Search similar Back to annex Compare
Permitted colorant— Annex IV, EU Regulation 1223/2009
Entry: 63

Chemical identity and properties

PubChem 2D chemical structure for CAS 2650-18-2
CAS 2650-18-2PubChem CID 17559

C.I. Acid Blue 9

Erioglaucine A is an aromatic amine. — ChEBI

IUPAC name
diazanium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate
Molecular formula
C37H42N4O9S3
Molecular weight
783.0 g/mol
Exact mass
782.21139245 Da
Topological polar surface area
205.0 Ų
Hydrogen-bond donors
2
Hydrogen-bond acceptors
10
Covalent units
3
Defined stereocentres
0

Also known as

Erioglaucine AAlphazurine FGErioglaucineErioglaucine EJapan Blue 205Alphazurine FGNDNeptune Blue WFFenazo Blue XR
16 more reported names
Patent Blue AECalcocid Blue EGKiton Blue ARXylene Blue VSGNeptune Blue BRAPatent Blue 2YCalcocid Blue 2GTortrazine C extraWater Blue 9Bucacid Azure BlueHidacid Azure BlueAcid Blue AE-SFBleu Brilliant FCFBrilliant Blue LakeKiton Pure Blue LPro-Jet Blue OAM
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

PubChem 2D chemical structure for CAS 3844-45-9
CAS 3844-45-9PubChem CID 19700

FD&C Blue No. 1

Brilliant Blue is an organic molecular entity. — ChEBI

IUPAC name
disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]benzenesulfonate
Molecular formula
C37H34N2Na2O9S3
Molecular weight
792.9 g/mol
Exact mass
792.12218275 Da
Topological polar surface area
203.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
10
Covalent units
3
Defined stereocentres
0

Also known as

Brilliant Blue FCFBrilliant BlueBlue 1206FD & C Blue no. 1Fenazo Blue XIJapan Blue 1Merantine Blue EGCosmetic Blue Lake
16 more reported names
Hexacol Brilliant Blue ABrilliant Blue FCF supraJapan Blue No. 1Intracid Pure Blue LUsacert Blue No. 1FDC Blue No. 1Food Blue Dye No. 1Modr Kysela 9Aizen Food Blue No. 2Modr Brilantni FCFblue no. 1C.I. ACID BLUE 9, DISODIUM SALTCanacert Brilliant Blue FCFModr Potravinarska 2Usacert FD and C Blue No. 1D&C Blue No. 1
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Record details

Warnings

Purity criteria as sset out in Commission Directive 95/45/EC (E 133)

Colour index or glossary

CI 42090/ ACID BLUE 9; ACID BLUE 9 AMMONIUM SALT; ACID BLUE 9 ALUMINUM LAKE

Chemical name

Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

Chemical / IUPAC name

Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

Color

Blue

Regulatory information

Regulation

(EC) 2009/1223

See every entry this act set

SCCS opinions

Identified ingredients

Key data

CAS
2650-18-2; 37307-56-5; 3844-45-9
EC
223-339-8
Annex
IV
Entry number
63

Inventory links for Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

Inventory Identified ingredient
Ref 31613

ACID BLUE 9

CAS: 3844-45-9
EC: 223-339-8
Inventory Restriction reference
Ref 32756

CI 42090

CAS: 3844-45-9
EC: 223-339-8

Direct matches are limited for this record, so nearby entries from Annex IV are shown as well.

Annex III 190
Shared CAS number

ACID BLUE 9

CAS: 3844-45-9 - 2650-18-2 - 68921-42-6
EC: 223-339-8 - 220-168-0 - 272-939-6
Annex IV 62
Nearby record in the same annex

CI 42080

CAS: 3486-30-4
EC: 222-476-0
Annex IV 64
Nearby record in the same annex

CI 42100

CAS: 4857-81-2
EC: 225-458-0
Annex IV 65
Nearby record in the same annex

CI 42170

CAS: 5863-51-4
EC: 227-513-4
Annex IV 66
Nearby record in the same annex

CI 42510

CAS: 632-99-5
EC: 211-189-6
Annex IV 58
Nearby record in the same annex

CI 40850

CAS: 514-78-3
EC: 208-187-2
Annex IV 68
Nearby record in the same annex

CI 42735

CAS: 6505-30-2
EC: 229-390-2
Annex IV 57
Nearby record in the same annex

CI 40825

CAS: 1109-11-1
EC: 214-173-7

What Annex IV means for Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt is an approved colorant listed in Annex IV of EU Cosmetics Regulation 1223/2009. Only colorants on this positive list may be used to colour cosmetic products on the EU market.

Some colorants in Annex IV are restricted by product type — for example, prohibited from use around the eyes or in products applied to mucous membranes. Check the product type and conditions fields above before use.

This record is linked to 4 CosIng inventory ingredients for name and identifier cross-reference. The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Confirm colorant is used only in permitted product types listed above.
  • Record the Colour Index number and CAS identifier in the ingredient declaration.

Frequently asked questions

Yes. Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt is included in Annex IV of EU Cosmetics Regulation 1223/2009 as a permitted colorant. Only colorants on this positive list may be used to colour cosmetic products in the EU. Check the product type conditions above for any use restrictions.

CAS 2650-18-2; 37307-56-5; 3844-45-9 is the unique numerical identifier assigned to Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex IV record Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt

This page summarizes one Annex IV record for Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex IV conditions for Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, disodium salt, but confirm any final regulatory decision against the current official annex wording and source files.

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