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InventoryRef 3276214/08/2020

CI 44045

[4-[[4-Anilino-1-naphthyl][4-(dimethylamino)phenyl]methylene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium chloride

CI 44045 is linked to 2 EU annex records on this page. Inventory note: IV/69 (CI 44045) II/1340 (Basic Blue 26; CI 44045: when used as a substance in hair dye products).

Regulatory evidence by market

This matrix separates verified ingredient rules from sources that are mapped but not yet imported. No imported rule does not mean the ingredient is permitted.

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MarketEvidence statusRecordsSource language
European UnionEvidence linked
Prohibited entry found
Open this evidence
2English and EU languages
Great BritainSource mapped
Official source mapped; ingredient rule not imported
0English
CanadaSource mapped
Official source mapped; ingredient rule not imported
0English and French
New ZealandSource mapped
Official source mapped; ingredient rule not imported
0English
ASEANSource mapped
Official source mapped; ingredient rule not imported
0English and national languages
ChinaSource mapped
Official source mapped; ingredient rule not imported
0Chinese with selected English material
JapanSource mapped
Official source mapped; ingredient rule not imported
0Japanese; official English translation available
South KoreaSource mapped
Official source mapped; ingredient rule not imported
0Korean with some English names
United StatesSource mapped
Official source mapped; ingredient rule not imported
0English
AustraliaSource mapped
Official source mapped; ingredient rule not imported
0English
BrazilEvidence linked
Prohibited
Open this evidence
1Portuguese with INCI crosswalks
IndiaSource mapped
Official source mapped; ingredient rule not imported
0English and Hindi
Saudi ArabiaSource mapped
Official source mapped; ingredient rule not imported
0Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 2580-56-5
CAS 2580-56-5PubChem CID 17407

Victoria Blue B

Victoria blue B is an iminium salt composed of 4-{(4-anilinonaphthalen-1-yl)[4-(dimethylamino)phenyl]methylidene}-N,N-dimethylcyclohexa-2,5-dien-1-iminium and chloride ions in a 1:1 ratio. It binds to nucleic acids and can be used in standardised staining techniques suitable for automated cell-pattern recognition. It has a role as a fluorochrome and a histological dye. It is an iminium salt and an organic chloride salt. It contains a victoria blue B(1+). ChEBI

IUPAC name
[4-[bis[4-(dimethylamino)phenyl]methylidene]naphthalen-1-ylidene]-phenylazanium chloride
Molecular formula
C33H32ClN3
Molecular weight
506.1 g/mol
Exact mass
505.2284757 Da
Topological polar surface area
20.5 Ų
Hydrogen-bond donors
1
Hydrogen-bond acceptors
3
Covalent units
2
Defined stereocentres
0

Also known as

Basic blue 26Calcozine Blue BC.I. BASIC BLUE 26C.I. 44045CI 44045Z1V8UTB56CCOVARIANE BLEU W 6129NSC-11245
16 more reported names
LOWACRYL BLUE 26CHEBI:87651Methanaminium, N-(4-((4-(dimethylamino)phenyl)(4-(phenylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-methyl-, chlorideMethanaminium, N-[4-[[4-(dimethylamino)phenyl][4-(phenylamino)-1-naphthalenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-methyl-, chlorideRefChem:934023219-943-64-(alpha-(4-anilino-1-naphthyl)-p-dimethylamino)benzylidene-2,5-cyclohexadien-1-ylidenedimethyl ammonium chlorideN-(4-((4-(Dimethylamino)phenyl)(4-(phenylamino)-1-naphthalenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-methylmethanaminium, chlorideTertrophene BlueVictoria Pure Blue BHecto Blue BVictoria Blue BXAizen Victoria Blue B BaseVictoria blueHekto Blue BVictoria Blue BA
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.

Inventory details for CI 44045

INCI name

CI 44045

Description

[4-[[4-Anilino-1-naphthyl][4-(dimethylamino)phenyl]methylene]cyclohexa-2,5-dien-1-ylidene]dimethylammonium chloride

Record provenance

Inventory reference
32762
Imported identity
CI 44045
Source update
14/08/2020
European Commission CosIng source notes
Annex IV Restriction reference
Entry 69

CI 44045

CAS: 2580-56-5
EC: 219-943-6

Key data

Restriction
IV/69 (CI 44045) II/1340 (Basic Blue 26; CI 44045: when used as a substance in hair dye products)
Function
COLORANT
Exclusively or mainly intended to colour the cosmetic product, the body as a whole or certain parts thereof, by absorption or reflection of visible light. All authorised colorants are substances in the positive list of Annex IV to the Cosmetics Regulation 1223/2009.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

Records sharing a CAS or EC identity

Ingredients with overlapping formulation functions

Additional official and scientific sources

11 external databases to check this identity in

How CI 44045 appears in the CosIng inventory

The CosIng inventory lists CI 44045 as a cosmetic ingredient and this page links it to 2 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

CI 44045 is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

CI 44045 appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for CI 44045 reads: "IV/69 (CI 44045) II/1340 (Basic Blue 26; CI 44045: when used as a substance in hair dye products)". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, CI 44045 carries the following function designation(s):

CAS 2580-56-5 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

Source note for CI 44045

This page combines the CosIng inventory entry for CI 44045 with 2 linked Annex II–VI records from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research CI 44045 and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

Tools & next steps

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