2,2'-(2,5-Thiophenediyl)bis-benzoxazole - ≥98% , CAS No.2866-43-5

CAS: 2866-43-5 Cat. No.: T665113 Molecular Weight: 318.35 EC Number: 220-685-1 PubChem CID: 17867
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
Fluorescent Brightener 185 | 2,5-Bis(2-benzoxazolyl)thiophene | 2,5-Di(benzoxazol-2-yl)thiophene
Storage
Protected from light,Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
25g
T665113-25g
1
$66.90
100g
T665113-100g
1
$119.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Protected from light,Room temperature Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Fluorescent Brightener 185 is an optical brightener dye.

Specifications

Synonyms
Fluorescent Brightener 185 | 2, 5-Bis(2-benzoxazolyl)thiophene | 2, 5-Di(benzoxazol-2-yl)thiophene
Specifications & Purity
≥98%
Storage
Protected from light, Room temperature
Shipped In
Normal
Purity
≥98%
Names and Identifiers
Canonical SmilesC1=CC=C2C(=C1)N=C(O2)C3=CC=C(S3)C4=NC5=CC=CC=C5O4
IUPAC Name2,2'-(2,5-Thiophenediyl)bis-benzoxazole
InChIKeyUGFSLKRMHPGLFU-UHFFFAOYSA-N
INCHI1S/C18H10N2O2S/c1-3-7-13-11(5-1)19-17(21-13)15-9-10-16(23-15)18-20-12-6-2-4-8-14(12)22-18/h1-10H
Isomeric SMILES C1=CC=C2C(=C1)N=C(O2)C3=CC=C(S3)C4=NC5=CC=CC=C5O4
Alternate CAS 12224-41-8,12224-46-3,2866-43-5
PubChem CID 17867
MeSH Entry Terms 2,5-bis(benzoxazol-2-yl)thiophene;FBA 185;FBA-185
Molecular Weight 318.35

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassBenzoxazoles
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentBenzoxazoles
Alternative Parents 2,5-disubstituted thiophenes  Benzenoids  Oxazoles  Heteroaromatic compounds  Oxacyclic compounds  Azacyclic compounds  Organopnictogen compounds  Organooxygen compounds  Organonitrogen compounds  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Benzoxazole - 2,5-disubstituted thiophene - Benzenoid - Azole - Oxazole - Thiophene - Heteroaromatic compound - Oxacycle - Azacycle - Organic nitrogen compound - Hydrocarbon derivative - Organopnictogen compound - Organooxygen compound - Organonitrogen compound - Organic oxygen compound - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as benzoxazoles. These are organic compounds containing a benzene fused to an oxazole ring Oxazole is five-membered aromatic ring with a nitrogen and an oxygen atoms at the 1- and 3-position, respectively.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Mechanisms of Action
Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

5 results found

Lot NumberCertificate TypeDateItem
A2606467Certificate of AnalysisDec 12, 2025 T665113
A2606468Certificate of AnalysisDec 12, 2025 T665113
E2408253Certificate of AnalysisMar 21, 2024 T665113
E2408254Certificate of AnalysisMar 21, 2024 T665113
H2507132Certificate of AnalysisMar 21, 2024 T665113
Chemical and Physical Properties
SensitivityLight sensitive
Melt Point(°C)216-220 ºC
Molecular Weight318.400 g/mol
XLogP34.700
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count5
Rotatable Bond Count2
Exact Mass318.046 Da
Monoisotopic Mass318.046 Da
Topological Polar Surface Area80.300 Ų
Heavy Atom Count23
Formal Charge0
Complexity399.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Solution Calculators
Reviews

Customer Reviews

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