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CAS 26523-78-4 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 3876915/10/2010

TRIS(NONYLPHENYL)PHOSPHITE

Tris(nonylphenyl) phosphite

TRIS(NONYLPHENYL)PHOSPHITE 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 26523-78-4

CAS 26523-78-4PubChem CID 76452

Tris(nonylphenyl)phosphite

IUPAC name: tris(4-nonylphenyl) phosphite

Molecular formula: C45H69O3P
Molecular weight: 689.0 g/mol
Exact mass: 688.49843306 Da
XLogP3: 19.3
Topological polar surface area: 27.7 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 0

Also known as

3050-88-2Phenol, 4-nonyl-, phosphite (3:1)Antioxidant TNPIrgafos TNPPNaugard TNPPSUMILIZER TNPp-Nonylphenol, phosphite (3:1)DOVERPHOS 4

16 more reported names

Tris(p-nonylphenyl) phosphiteE423N4NW2ZPhenol, nonyl-, 1,1',1''-phosphiteTris[p-nonylphenyl] phosphiteTrisnonylphenylphosphitRefChem:900350Phenol,nonyl-,phosphite (3:1)TRIS(NONYLPHENYL)PHOSPHITE [INCI]247-759-6608-492-4Phenol, nonyl-, phosphite (3:1)Tris(nonylphenyl) phosphitetris(4-nonylphenyl)phosphitetris-(p-nonylphenyl) phosphiteMGMXGCZJYUCMGY-UHFFFAOYSA-NPhenol, 4-anonyl-a, phosphite (3:1)

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID60872866
PubMed:21367689
PubMed:16546889

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 TRIS(NONYLPHENYL)PHOSPHITE

INCI name

TRIS(NONYLPHENYL)PHOSPHITE

Description

Tris(nonylphenyl) phosphite

Record provenance

Inventory reference: 38769
Imported identity: TRIS(NONYLPHENYL)PHOSPHITE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for TRIS(NONYLPHENYL)PHOSPHITE

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Key data

CAS

26523-78-4

247-759-6

Restriction

—

Function

ANTIOXIDANT: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#29441 · TRIS(NONYLPHENYL)PHOSPHITE

Ingredients with overlapping formulation functions

TRIPEPTIDE-77 VALINAMIDEANTIMICROBIAL, ANTIOXIDANT, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

TRIPEPTIDE-93ANTIOXIDANT; SKIN CONDITIONING - MISCELLANEOUS

TRIPEPTIDE-96 HEXA-(PROLYL HYDROXYPROLYL GLYCYL) TRIPEPTIDE-97 PENTA-(PROLYL HY…ANTIOXIDANT; SKIN CONDITIONING - EMOLLIENT; HAIR CONDITIONING; NAIL CONDITIONING; ORAL CARE

TRIPROPYLENE GLYCOLANTIOXIDANT, EMULSION STABILISING, HUMECTANT

TRIS(T-BUTYL HYDROXYDIMETHYLBENZYL) ISOCYANURIC ACIDANTIOXIDANT

TRIS-BHT MESITYLENEANTIOXIDANT

TRISODIUM ASCORBYL HEXYLDECANOATE PHOSPHATEANTI-SEBUM, ANTIOXIDANT, BLEACHING, HUMECTANT, SURFACTANT - CLEANSING

TRISODIUM ASCORBYL ISOPALMITATE PHOSPHATEANTIOXIDANT, SKIN CONDITIONING

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 TRIS(NONYLPHENYL)PHOSPHITE appears in the CosIng inventory

The CosIng inventory lists TRIS(NONYLPHENYL)PHOSPHITE 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.

TRIS(NONYLPHENYL)PHOSPHITE 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

TRIS(NONYLPHENYL)PHOSPHITE 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, TRIS(NONYLPHENYL)PHOSPHITE carries the following function designation(s):

ANTIOXIDANT

CAS 26523-78-4 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 TRIS(NONYLPHENYL)PHOSPHITE

This page reproduces the CosIng inventory entry for TRIS(NONYLPHENYL)PHOSPHITE 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 TRIS(NONYLPHENYL)PHOSPHITE 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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