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CAS 1533-45-5

CAS 1533-45-5 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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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 Ų
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

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

Records for CAS 1533-45-5

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How CAS 1533-45-5 is used on this site

CAS 1533-45-5 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 1533-45-5 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.