What does the restriction note for CI 12150 mean?

The restriction field for CI 12150 reads: II/1231. 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 1229-55-6?

CAS 1229-55-6 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 CI 12150?

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 8448515/10/2010

CI 12150

1-[(2-methoxyphenyl)azo]-2-naphthol

CI 12150 is linked to 1 EU annex record on this page. Inventory note: II/1231.

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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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Market	Evidence status	Records	Source language
European Union	Evidence linked Prohibited entry found Open this evidence	1	English and EU languages
Great Britain	Source mapped Official source mapped; ingredient rule not imported	0	English
Canada	Source mapped Official source mapped; ingredient rule not imported	0	English and French
New Zealand	Source mapped Official source mapped; ingredient rule not imported	0	English
ASEAN	Source mapped Official source mapped; ingredient rule not imported	0	English and national languages
China	Source mapped Official source mapped; ingredient rule not imported	0	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	Source mapped Official source mapped; ingredient rule not imported	0	English and Hindi
Saudi Arabia	Source mapped Official source mapped; ingredient rule not imported	0	Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 1229-55-6

CAS 1229-55-6PubChem CID 14678

Sudan R

IUPAC name: 1-[(2-methoxyphenyl)diazenyl]naphthalen-2-ol

Molecular formula: C17H14N2O2
Molecular weight: 278.30 g/mol
Exact mass: 278.105527694 Da
XLogP3: 4.6
Topological polar surface area: 54.2 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

Sudan Red GSolvent red 1Ceres Red G1-((2-Methoxyphenyl)diazenyl)naphthalen-2-ol1-(2-Methoxyphenylazo)-2-naphtholFat Red BGFat Soluble Red SC.I. Solvent Red 1

16 more reported names

Organol VermilionResinol Red GSilotras Red TGSomalia Red PGOleal Red GFat-soluble Red SC.I. Food Red 16Plastoresin Red FRCeres Red G 1021-(o-Anisylazo)-2-naphtholC.I. Solvent Red IC.I. 121502-Naphthalenol, 1-((2-methoxyphenyl)azo)-CI 121501-((2-Methoxyphenyl)azo)-2-naphtholSolvent Red 1 (C.I.)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEMBL:CHEMBL1986529
EPA DTXSID:DTXSID3061635

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match14678

Attributed physical-property, hazard, environmental and use annotations.

Uses: Substance listed with specific concentration in tattoo ink and/or permanent make up according to EU Commission Regulation 2020/2081. The concentration limit (by weight) is 0.1%. Source: NORMAN Suspect List Exchange

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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 CI 12150

INCI name

CI 12150

Description

1-[(2-methoxyphenyl)azo]-2-naphthol

Record provenance

Inventory reference: 84485
Imported identity: CI 12150
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for CI 12150

Annex II Restriction reference

Entry 1231

Solvent Red 1 (CI 12150), when used as a substance in hair dye products

CAS: 1229-55-6

EC: 214-968-9

Key data

CAS

1229-55-6

214-968-9

Restriction

II/1231

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.

#6346 · CI 12150

Records sharing a CAS or EC identity

SOLVENT RED 1

Ingredients with overlapping formulation functions

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 CI 12150 appears in the CosIng inventory

The CosIng inventory lists CI 12150 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.

CI 12150 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 12150 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 12150 reads: "II/1231". 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 12150 carries the following function designation(s):

COLORANT

CAS 1229-55-6 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.

View CAS records

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

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Source note for CI 12150

This page combines the CosIng inventory entry for CI 12150 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 CI 12150 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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Search similar ingredients

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