Is CROTONIC ACID safe to use in EU cosmetics?

CROTONIC ACID is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 3724-65-0?

CAS 3724-65-0 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 7539515/10/2010

CROTONIC ACID

Q: How do I check if my formula contains CROTONIC ACID?

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.

2-Butenoic acid

CROTONIC ACID is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Inventory details for CROTONIC ACID

INCI name

CROTONIC ACID

Description

2-Butenoic acid

Annex records for CROTONIC ACID

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Key data

CAS

3724-65-0

223-077-4

Restriction

—

Function

FRAGRANCE LIGHT STABILIZER

How CROTONIC ACID appears in the CosIng inventory

The CosIng inventory lists CROTONIC ACID as a cosmetic ingredient and this page links it to 0 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.

CROTONIC ACID 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

CROTONIC ACID is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, CROTONIC ACID carries the following function designation(s):

CAS 3724-65-0 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 CROTONIC ACID

This page reproduces the CosIng inventory entry for CROTONIC ACID from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research CROTONIC ACID 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

Scan a full INCI list to detect CROTONIC ACID and any linked EU annex restrictions or allergen flags.

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Search similar ingredients

Find other inventory ingredients and annex entries related to CROTONIC ACID, its identifiers or nearby name variants.