Eosin Y (AMI-5) - ≥95% , CAS No.15086-94-9

CAS: 15086-94-9 Cat. No.: E1375651 Formula: C20H8Br4O5 Molecular Weight: 647.89 EC Number: 239-138-3
AVAILABLE TO ORDER
GRADE & PURITY ≥95%
Synonyms
Acid eosin | AKOS024374936 | EOSIN Y FREE ACID [MI] | Japan Red No. 223 | SCHEMBL113395 | Solvent Red 43 | 2',4',5',7'-tetrabromo-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one | Eosin acid | BDBM50376168 | Bromofluoresceic acid (Salt/Mix)
Storage
Room temperature
Shipped In
Normal
★
Size
USA
Germany (EU)*
Price
Qty
5g
E1375651-5g
3 In stock
—
$19.90
25g
E1375651-25g
Made to order · 8–12 wks
$19.90
100g
E1375651-100g
Made to order · 8–12 wks
$49.90
500g
E1375651-500g
Made to order · 8–12 wks
$149.90
Enter a quantity for the sizes you want to add.
🧪
Why this grade

≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

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 99 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
Acid eosin | AKOS024374936 | EOSIN Y FREE ACID [MI] | Japan Red No. 223 | SCHEMBL113395 | Solvent Red 43 | 2',4',5',7'-tetrabromo-3',6'-dihydroxy-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one | Eosin acid | BDBM50376168 | Bromofluoresceic acid (Salt/Mix)
Specifications & Purity
≥95%
Biochemical and Physiological Mechanisms
Eosin Y is a xanthene dye and is used for the differential staining of connective tissue and cytoplasm. In histopathology, it is applied as a counterstain after hematoxylin and before methylene blue. It is also used as a background stain, thereby giving c
Application
Eosin Y has been used as a stain: to determine the location of the brain sections for staining of fixed liver tissue for histological examination of brain sections from the dorsal hippocampus
Storage
Room temperature
Shipped In
Normal
Note
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥95%
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/528769935
Canonical Smiles
C1=CC=C2C(=C1)C(=O)OC23C4=CC(=C(C(=C4OC5=C(C(=C(C=C35)Br)O)Br)Br)O)Br
IUPAC Name
2',4',5',7'-tetrabromo-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
InChIKey
DBZJJPROPLPMSN-UHFFFAOYSA-N
INCHI
1S/C20H8Br4O5/c21-11-5-9-17(13(23)15(11)25)28-18-10(6-12(22)16(26)14(18)24)20(9)8-4-2-1-3-7(8)19(27)29-20/h1-6,25-26H
Isomeric SMILES
C1=CC=C2C(=C1)C(=O)OC23C4=CC(=C(C(=C4OC5=C(C(=C(C=C35)Br)O)Br)Br)O)Br
WGK Germany
3
RTECS
LM5800000
Alternate CAS
17372-87-1
Molecular Weight
647.89
Reaxy-Rn
63410
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=63410&ln=

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
ClassBenzopyrans
Subclass1-benzopyrans
Intermediate Tree Nodes Dibenzopyrans
Direct ParentXanthenes
Alternative Parents Diarylethers  Phthalides  Benzofuranones  Isobenzofurans  O-bromophenols  Aryl bromides  Lactones  Carboxylic acid esters  Oxacyclic compounds  Monocarboxylic acids and derivatives  Organobromides  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Xanthene - Diaryl ether - Isobenzofuranone - Benzofuranone - Phthalide - Isocoumaran - Isobenzofuran - 2-bromophenol - Benzenoid - Aryl bromide - Aryl halide - Carboxylic acid ester - Lactone - Oxacycle - Carboxylic acid derivative - Ether - Monocarboxylic acid or derivatives - Organic oxygen compound - Organohalogen compound - Organobromide - Organooxygen compound - Hydrocarbon derivative - Organic oxide - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as xanthenes. These are polycyclic aromatic compounds containing a xanthene moiety, which consists of two benzene rings joined to each other by a pyran ring.
External Descriptors organobromine compound
3D Structure
Interactive Chemical Structure Model





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.

12 results found

Lot NumberCertificate TypeDateItem
C2603442Certificate of AnalysisFeb 05, 2026 E1375651
C2603443Certificate of AnalysisFeb 05, 2026 E1375651
C2603444Certificate of AnalysisFeb 05, 2026 E1375651
C2603450Certificate of AnalysisFeb 05, 2026 E1375651
F2629005Certificate of AnalysisFeb 05, 2026 E1375651
G2630057Certificate of AnalysisFeb 05, 2026 E1375651
A2616039Certificate of AnalysisAug 11, 2025 E1375651
A2616084Certificate of AnalysisAug 11, 2025 E1375651
H2508319Certificate of AnalysisAug 11, 2025 E1375651
H2508435Certificate of AnalysisAug 11, 2025 E1375651
H2508436Certificate of AnalysisAug 11, 2025 E1375651
H2508437Certificate of AnalysisAug 11, 2025 E1375651
Chemical and Physical Properties
SensitivityMoisture sensitive.
Melt Point(°C)295 °C
Molecular Weight647.900 g/mol
XLogP36.200
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count5
Rotatable Bond Count0
Exact Mass647.706 Da
Monoisotopic Mass643.711 Da
Topological Polar Surface Area76.000 Ų
Heavy Atom Count29
Formal Charge0
Complexity645.000
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
Documents & Articles
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

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