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CAS 552-30-7 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.

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InventoryRef 9592218/04/2018

TRIMELLITIC ANHYDRIDE

5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-

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

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 552-30-7

CAS 552-30-7PubChem CID 11089

Trimellitic anhydride

Trimellitic anhydride is a 2-benzofuran compound having oxo groups at the 1- and 3-positions and a carboxy substituent at the 5-position; the cyclic anhydride formed from the carboxy groups at the 1- and 2-positions of trimellitic acid. It has a role as an allergen, an epitope and a hapten. It is a dioxo monocarboxylic acid, a cyclic dicarboxylic anhydride and a member of 2-benzofurans. It is functionally related to a trimellitic acid and a phthalic anhydride. — ChEBI

IUPAC name: 1,3-dioxo-2-benzofuran-5-carboxylic acid

Molecular formula: C9H4O5
Molecular weight: 192.12 g/mol
Exact mass: 192.00587322 Da
XLogP3: 0.8
Topological polar surface area: 80.7 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 0

Also known as

1,2,4-Benzenetricarboxylic anhydrideAnhydrotrimellitic acidTrimellitic acid anhydride4-Carboxyphthalic anhydrideTMANTrimellitic acid 1,2-anhydrideTrimellic acid anhydride1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid

16 more reported names

1,3-Dioxo-5-phthalancarboxylic acidTrimellic acid 1,2-anhydride1,3-Dioxo-1,3-dihydro-2-benzofuran-5-carboxylic acidEpon 9150Trimellitic acid cyclic 1,2-anhydride5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-NCI-C566331,2,4-Benzenetricarboxylic acid anhydride1,2,4-Benzenetricarboxylic acid 1,2-anhydride1,2,4-Benzenetricarboxylic acid, cyclic 1,2-anhydride5-Phthalanacarboxylic acid, 1,3-dioxo-80T61EUU7HCHEBI:53050NSC-60252tri-mellitic anhydrideRefChem:899716

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:53050
ChEMBL:CHEMBL2137687
EPA DTXSID:DTXSID7026235
PubMed:22439792
PubMed:22381623
PubMed:21997384
PubMed:21915071
PubMed:21893156
PubMed:21785612
PubMed:21747867
PubMed:21738881
PubMed:21691754
PubMed:21534883
PubMed:21432060
PubMed:21364926

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for TRIMELLITIC ANHYDRIDE

INCI name

TRIMELLITIC ANHYDRIDE

Description

5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-

Record provenance

Inventory reference: 95922
Imported identity: TRIMELLITIC ANHYDRIDE
Source update: 18/04/2018

European Commission CosIng source notes

Annex records for TRIMELLITIC ANHYDRIDE

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Key data

CAS

552-30-7

—

Restriction

—

Function

NOT REPORTED: No function currently reported.

Ingredients with overlapping formulation functions

TITANIUM TETRA T-BUTOXIDENOT REPORTED

TITANUM TETRA T-BUTOXIDENOT REPORTED

TOLUENE DIISOCYANATENOT REPORTED

TRIFLUOROMETHYL DEHYDROLATANOPROSTNOT REPORTED

TRIMETHYLHEXAMETHYLENE DIISOCYANATENOT REPORTED

TRIMETHYLOLPROPANE DIALLYL ETHERNOT REPORTED

TRIMETHYLOLPROPANE TRIS-MERCAPTOPROPIONATENOT REPORTED

TRIMETHYLPENTYL/METHOXY PEG-10 PROPYL POLYSILSESQUIOXANENOT REPORTED

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How TRIMELLITIC ANHYDRIDE appears in the CosIng inventory

The CosIng inventory lists TRIMELLITIC ANHYDRIDE 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.

TRIMELLITIC ANHYDRIDE 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

TRIMELLITIC ANHYDRIDE 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, TRIMELLITIC ANHYDRIDE carries the following function designation(s):

NOT REPORTED

CAS 552-30-7 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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Source note for TRIMELLITIC ANHYDRIDE

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

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