What does the restriction note for CI 42090 mean?

The restriction field for CI 42090 reads: IV/63 (CI 42090) III/190 (Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake). 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 3844-45-9?

CAS 3844-45-9 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 3275614/08/2020

CI 42090

Q: How do I check if my formula contains CI 42090?

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.

Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt

CI 42090 is linked to 2 EU annex records on this page. Inventory note: IV/63 (CI 42090) III/190 (Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake).

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Inventory details for CI 42090

INCI name

CI 42090

Description

Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt

Annex records for CI 42090

Annex III Restriction reference

Entry 190

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 Restriction reference

Entry 63

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

CAS: 2650-18-2; 37307-56-5; 3844-45-9

EC: 223-339-8

Key data

CAS

3844-45-9

223-339-8

Restriction

IV/63 (CI 42090) III/190 (Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake)

Function

COLORANT HAIR DYEING

How CI 42090 appears in the CosIng inventory

The CosIng inventory lists CI 42090 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 42090 is also tagged with 2 cosmetic functions 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 42090 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 42090 reads: "IV/63 (CI 42090) III/190 (Acid Blue 9; Acid Blue 9 Ammonium Salt; Acid Blue 9 Aluminum Lake)". 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 42090 carries the following function designation(s):

CAS 3844-45-9 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 CI 42090

This page combines the CosIng inventory entry for CI 42090 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 42090 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

Check your formula

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Search similar ingredients

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