Is POLYSTYRENE safe to use in EU cosmetics?

POLYSTYRENE 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 9003-53-6?

CAS 9003-53-6 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 7932815/10/2010

POLYSTYRENE

Q: How do I check if my formula contains POLYSTYRENE?

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.

Ethenylbenzene, homopolymer

POLYSTYRENE 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 POLYSTYRENE

INCI name

POLYSTYRENE

Description

Ethenylbenzene, homopolymer

Annex records for POLYSTYRENE

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Key data

CAS

9003-53-6

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Restriction

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Function

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How POLYSTYRENE appears in the CosIng inventory

The CosIng inventory lists POLYSTYRENE 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.

POLYSTYRENE 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

POLYSTYRENE 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, POLYSTYRENE carries the following function designation(s):

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CAS 9003-53-6 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 POLYSTYRENE

This page reproduces the CosIng inventory entry for POLYSTYRENE 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 POLYSTYRENE 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 POLYSTYRENE 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 POLYSTYRENE, its identifiers or nearby name variants.