What does the restriction note for BASIC BLUE 3 mean?

The restriction field for BASIC BLUE 3 reads: II/1275. This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

What other records share CAS 33203-82-6?

CAS 33203-82-6 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

How do I check if my formula contains BASIC BLUE 3?

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

InventoryRef 3206315/10/2010

BASIC BLUE 3

3,7-Bis(diethylamino)phenoxazin-5-ium chloride

BASIC BLUE 3 is linked to 1 EU annex record on this page. Inventory note: II/1275.

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Regulatory evidence by market

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Market	Evidence status	Records	Source language
European Union	Evidence linked Prohibited entry found Open this evidence	1	English and EU languages
Great Britain	Evidence linked Prohibited Open this evidence	1	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Evidence linked Prohibited Open this evidence	1	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Evidence linked Prohibited Open this evidence	1	Chinese with selected English material
Japan	Source mapped Official source mapped; ingredient rule not imported	0	Japanese; official English translation available
South Korea	Source mapped Official source mapped; ingredient rule not imported	0	Korean with some English names
United States	Source mapped Official source mapped; ingredient rule not imported	0	English
Australia	Source mapped Official source mapped; ingredient rule not imported	0	English
Brazil	Evidence linked Prohibited Open this evidence	1	Portuguese with INCI crosswalks
India	Evidence linked Prohibited Open this evidence	1	English and Hindi
Saudi Arabia	Evidence linked Prohibited Open this evidence	1	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 33203-82-6

CAS 33203-82-6PubChem CID 118408

C.I. Basic Blue 3

IUPAC name: [7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium chloride

Molecular formula: C20H26ClN3O
Molecular weight: 359.9 g/mol
Exact mass: 359.1764402 Da
Topological polar surface area: 27.8 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 2
Defined stereocentres: 0

Also known as

Basic Blue 3CCRIS 24493,7-Bis(diethylamino)phenoxazin-5-ium chlorideEINECS 251-403-5NSC 409100Phenoxazin-5-ium, 3,7-bis(diethylamino)-, chloride (1:1)UNII-H82L80329YLOWACRYL BLUE 3

16 more reported names

H82L80329YNSC-4091007-(N,N-Diethylamino)phenoxazine-3-N,N-diethyliminium chloride3,7-BIS(DIETHYLAMINO)PHENOXAZONIUM CHLORIDEDIETHYL(7-DIETHYLAMINO-3H-PHENOXAZIN-3-YLIDENE)AMMONIUM CHLORIDEAMMONIUM, (7-(DIETHYLAMINO)-3H-PHENOXAZIN-3-YLIDENE)DIETHYL-, CHLORIDE6703-67-9RefChem:122486BASIC BLUE 3 [INCI]611-321-6614-016-6BASICBLUE3Phenoxazin-5-ium, 3,7-bis(diethylamino)-, chloride[7-(diethylamino)phenoxazin-3-ylidene]-diethylazanium;chlorideEthanaminium, N-(7-(diethylamino)-3H-phenoxazin-3-ylidene)-N-ethyl-, chlorideBasic Blue BG

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEMBL:CHEMBL389921
EPA DTXSID:DTXSID30873926

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for BASIC BLUE 3

INCI name

BASIC BLUE 3

Description

3,7-Bis(diethylamino)phenoxazin-5-ium chloride

Record provenance

Inventory reference: 32063
Imported identity: BASIC BLUE 3
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for BASIC BLUE 3

Annex II Restriction reference

Entry 1275

Phenoxazin-5-ium, 3,7-bis(diethylamino)-, and its salts, when used as a substance in hair dye produ…

CAS: 47367-75-9 / 33203-82-6

EC: 251-403-5

Key data

CAS

33203-82-6

251-403-5

Restriction

II/1275

Function

HAIR DYEING: Imparting color to hair. Hair dyeing preparations may be temporary, semi-permanent, or permanent, depending on the length of time the colorant remains on the hair.

Official EU ingredient-name evidence

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

#3072 · BASIC BLUE 3

Ingredients with overlapping formulation functions

ACID YELLOW 73COLORANT, HAIR DYEING

ACID YELLOW 73 SODIUM SALTHAIR DYEING

BASIC BLUE 124HAIR DYEING

BASIC BLUE 26HAIR DYEING

BASIC BLUE 41HAIR DYEING

BASIC BLUE 47HAIR DYEING

BASIC BLUE 6HAIR DYEING

BASIC BLUE 7HAIR DYEING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How BASIC BLUE 3 appears in the CosIng inventory

The CosIng inventory lists BASIC BLUE 3 as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

BASIC BLUE 3 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

BASIC BLUE 3 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 BASIC BLUE 3 reads: "II/1275". 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, BASIC BLUE 3 carries the following function designation(s):

HAIR DYEING

CAS 33203-82-6 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.

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Source note for BASIC BLUE 3

This page combines the CosIng inventory entry for BASIC BLUE 3 with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research BASIC BLUE 3 and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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