What other records share CAS 121-91-5?

CAS 121-91-5 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 9528827/04/2018

ISOPHTHALIC ACID

Q: How do I check if my formula contains ISOPHTHALIC 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.

Benzene, 1,3-Dicarboxylic acid,m-Phthalic acid

ISOPHTHALIC 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 ISOPHTHALIC ACID

INCI name

ISOPHTHALIC ACID

Description

Benzene, 1,3-Dicarboxylic acid,m-Phthalic acid

Annex records for ISOPHTHALIC ACID

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Key data

CAS

121-91-5

204-506-4

Restriction

—

Function

NOT REPORTED

How ISOPHTHALIC ACID appears in the CosIng inventory

The CosIng inventory lists ISOPHTHALIC 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.

ISOPHTHALIC ACID 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

ISOPHTHALIC 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, ISOPHTHALIC ACID carries the following function designation(s):

NOT REPORTED

CAS 121-91-5 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 ISOPHTHALIC ACID

This page reproduces the CosIng inventory entry for ISOPHTHALIC 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 ISOPHTHALIC 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 ISOPHTHALIC ACID and any linked EU annex restrictions or allergen flags.

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