What other records share CAS 2051-85-6?

CAS 2051-85-6 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.

InventoryRef 3815213/08/2020

SOLVENT ORANGE 1

Q: What does the restriction note for SOLVENT ORANGE 1 mean?

The restriction field for SOLVENT ORANGE 1 reads: II/1343 (Solvent Orange 1; CI 11920: and its salts when used as a substance in hair dye products). This is the restriction note from the CosIng inventory. For authoritative conditions and limits, always refer to the linked annex entries.

Q: How do I check if my formula contains SOLVENT ORANGE 1?

Use the INCI Checker tool on CosIng Checker to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

4-(Phenylazo)resorcinol (CI 11920)

SOLVENT ORANGE 1 is linked to 2 EU annex records on this page. Inventory note: II/1343 (Solvent Orange 1; CI 11920: and its salts when used as a substance in hair dye products).

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Inventory details for SOLVENT ORANGE 1

INCI name

SOLVENT ORANGE 1

Description

4-(Phenylazo)resorcinol (CI 11920)

Annex records for SOLVENT ORANGE 1

Annex II Restriction reference

Entry 1343

4-(Phenylazo)resorcinol (Solvent Orange 1; CI 11920) and its salts, when used as a substance in hai…

CAS: 2051-85-6

EC: 218-131-9

Annex IV Identified ingredient

Entry 7

CI 11920

CAS: 2051-85-6

EC: 218-131-9

Key data

CAS

2051-85-6

218-131-9

Restriction

II/1343 (Solvent Orange 1; CI 11920: and its salts when used as a substance in hair dye products)

Function

HAIR DYEING

How SOLVENT ORANGE 1 appears in the CosIng inventory

The CosIng inventory lists SOLVENT ORANGE 1 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.

SOLVENT ORANGE 1 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

SOLVENT ORANGE 1 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 SOLVENT ORANGE 1 reads: "II/1343 (Solvent Orange 1; CI 11920: and its salts 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, SOLVENT ORANGE 1 carries the following function designation(s):

HAIR DYEING

CAS 2051-85-6 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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Use the INCI Checker tool to paste your full ingredient list and scan it against all EU annex records and allergen flags in one step.

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Source note for SOLVENT ORANGE 1

This page combines the CosIng inventory entry for SOLVENT ORANGE 1 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 SOLVENT ORANGE 1 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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Scan a full INCI list to detect SOLVENT ORANGE 1 and any linked EU annex restrictions or allergen flags.

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