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CAS 7128-64-5 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.

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InventoryRef 9262508/11/2017

BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE

Benzoxazole, 2,2'-(2,5-Thiophenediyl)Bis[5-(1,1-Dimethylethyl)-

BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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 7128-64-5

CAS 7128-64-5PubChem CID 292429

Fluorescent brightener 184

2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene is a benzoxazole. — ChEBI

IUPAC name: 5-tert-butyl-2-[5-(5-tert-butyl-1,3-benzoxazol-2-yl)thiophen-2-yl]-1,3-benzoxazole

Molecular formula: C26H26N2O2S
Molecular weight: 430.6 g/mol
Exact mass: 430.17149925 Da
XLogP3: 8.0
Topological polar surface area: 80.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 0

Also known as

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiopheneBenzoxazole, 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-NSC 158163EINECS 230-426-4Benzoxazole, 2,2'-(2,5-thiophenediyl)bis(5-tert-butyl-Bis(tert-butyl benzoxazolyl) thiopheneW7UR9129GPBRIGHTENER OB

16 more reported names

TINOPAL OBUVITEX 3BSA2,2'-(2,5-Thiophenediyl)bis(5-tert-butylbenzoxazole)KEYFLUOR WHITE PL2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene2,5-Bis(5'-tert-butyl-2-benzoxazolyl)thiopheneNSC-1581632,5-Thiophenediylbis(5-tert-butyl-1,3-benzoxazole)C.I. Fluorescent Brightening Agent 184EC 230-426-4Benzoxazole, 2,2'-(2,5-thiophenediyl)bis(5-(1,1-dimethylethyl)-bis(t-butyl benzoxazolyl) thiopheneCI 515245C.I. 515245C.I. FLUORESCENT BRIGHTENER 184BENZOXAZOLE2,2'-(2,5-Thiophenediyl)bis[5-tert-butylbenzoxazole]

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:211245
EPA DTXSID:DTXSID1048205
PubMed:22131802
PubMed:22121681
PubMed:21916450
PubMed:21581379
PubMed:21446524
PubMed:16494319
PubMed:15962942

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 BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE

INCI name

BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE

Description

Benzoxazole, 2,2'-(2,5-Thiophenediyl)Bis[5-(1,1-Dimethylethyl)-

Record provenance

Inventory reference: 92625
Imported identity: BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE
Source update: 08/11/2017

European Commission CosIng source notes

Annex records for BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE

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Key data

CAS

7128-64-5

230-426-4

Restriction

—

Function

SKIN CONDITIONING: Maintaining the skin in good condition.

Records sharing a CAS or EC identity

BIS-(T-BUTYL BENZOXAZOLYL) THIOPHENE

Ingredients with overlapping formulation functions

BIPHENYLHYDROXAMIC ACIDANTIMICROBIAL, ANTIOXIDANT, COLORANT, SKIN CONDITIONING

BIS(AMINOPROPYL) BIS(NAPHTHYLMETHYL) MELAMINE HCLANTIOXIDANT, SKIN CONDITIONING, SKIN PROTECTING

BIS(CYANO BUTYLACETATE) ANTHRACENEDIYLIDENESKIN CONDITIONING

BIS(PPG-7 UNDECENETH-21) DIMETHICONEHAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFAC…

BIS(TRIOCTYLDODECYL CITRYL) DILINOLEATESKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

BIS(TRIPEPTIDE-1) COPPER ACETATESKIN CONDITIONING

BIS-(POLYGLYCERYL-3 OXYPHENYLPROPYL) DIMETHICONEHAIR CONDITIONING, SKIN CONDITIONING

BIS-(POLYGLYCERYL-7 OXYPHENYLPROPYL) DIMETHICONEHAIR CONDITIONING, 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 BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE appears in the CosIng inventory

The CosIng inventory lists BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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.

BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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

BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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, BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE carries the following function designation(s):

SKIN CONDITIONING

CAS 7128-64-5 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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Source note for BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE

This page reproduces the CosIng inventory entry for BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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 BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 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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