Official EU label nameGlossary entry 10557

FLUORESCENT BRIGHTENER 393

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:1533-45-5

Ingredient index records:

FLUORESCENT BRIGHTENER 393

Cosmetic functions: COLORANT

Fluorescent Brightener 393 is the organic compound.

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1 matched or reported name

FLUORESCENT BRIGHTENER 393

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name FLUORESCENT BRIGHTENER 393.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 1533-45-5

CAS 1533-45-5PubChem CID 73744

4,4'-Bis(2-benzoxazolyl)stilbene

IUPAC name: 2-[4-[2-[4-(1,3-benzoxazol-2-yl)phenyl]ethenyl]phenyl]-1,3-benzoxazole

Molecular formula: C28H18N2O2
Molecular weight: 414.5 g/mol
Exact mass: 414.136827821 Da
XLogP3: 7.2
Topological polar surface area: 52.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 4
Covalent units: 1
Defined stereocentres: 0

Also known as

Benzoxazole, 2,2'-(1,2-ethenediyldi-4,1-phenylene)bis-RefChem:5065511,2-Bis(4-(benzo[d]oxazol-2-yl)phenyl)etheneC28H18N2O2Fluorescent brightener OB-1OPTICAL BRIGHTENER 1CS-W011665AC-10112

12 more reported names

4,4'-Bis(1,3-benzoxazol-2-yl)stilbene4,4'-BIS(2-BENZOXAZOLYL)STILBENE, TRANS-ORACIQIJMCYPHQ-UHFFFAOYSA-N4,4'-bis(2-benzoxazolyl) stilbene1,2-Bis(4-(benzo[d]oxazol-2-yl)pDB-043188B27292,2\'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazoleFluorescent brightener 393 Solution in DMSO, 10ug/mL2,2'-[Ethene-1,2-diyldi(4,1-phenylene)]bis(1,3-benzoxazole)2-[4-[2-[4-(1,3-benzoxazol-2-yl)phenyl]vinyl]phenyl]-1,3-benzoxazoleBBS

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External database identifiers

EPA DTXSID:DTXSID4051744
PubMed:20048416
PubMed:16494319
PubMed:12433104

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

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 US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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