CompoundList
Sign in
Fluorescent dyes and stains

Ethyl eosin

Also known as Benzoic acid, 2-(2,4,5,7-tetrabromo-6-hydroxy-3-oxo-3H-xanthen-9-yl)-, ethyl ester, potassium salt, Solvent Red 45, Potassium ethyl eosin anion

CAS 6359-05-3Formula C22H11Br4KO5Molar mass 714.04 g/molEC 228-792-5
4 suppliers listed
Get quotes Compare 4 suppliers
Ethyl eosin chemical structure, C22H11Br4KO5, CAS 6359-05-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
6359-05-3
Formula
C22H11Br4KO5
Molar mass
714.04 g/mol
EC number
228-792-5
HS code
320419
Category
Fluorescent dyes and stains

What is Ethyl eosin?

Plain description, key identifiers and synonyms

Ethyl eosin is an organic potassium salt having 2,4,5,7-tetrabromo-9-{2-[(ethyloxy)carbonyl]phenyl}-3-oxo-3H-xanthen-6-olate as the counterion. It has a role as a photosensitizing agent, a fluorochrome and a histological dye. It contains an ethyl eosin anion.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
potassium 2,4,5,7-tetrabromo-9-(2-ethoxycarbonylphenyl)-6-oxoxanthen-3-olate
CAS number
6359-05-3Other or deprecated CAS: 6359-04-2
EC numbers
228-792-5, 228-793-0
Molecular formula
C22H11Br4KO5
MDL number
MFCD00005039
InChIKey
UKZQEOHHLOYJLY-UHFFFAOYSA-M
InChI
InChI=1S/C22H12Br4O5.K/c1-2-30-22(29)10-6-4-3-5-9(10)15-11-7-13(23)18(27)16(25)20(11)31-21-12(15)8-14(24)19(28)17(21)26;/h3-8,27H,2H2,1H3;/q;+1/p-1
SMILES (canonical and isomeric)
CCOC(=O)C1=CC=CC=C1C2=C3C=C(C(=O)C(=C3OC4=C(C(=C(C=C24)Br)[O-])Br)Br)Br.[K+]

Synonyms

  • Benzoic acid, 2-(2,4,5,7-tetrabromo-6-hydroxy-3-oxo-3H-xanthen-9-yl)-, ethyl ester, potassium salt
  • Solvent Red 45
  • Potassium ethyl eosin anion
  • Ethyl Eosin (Potassium Salt)
  • Potassium ethyl o-(2,4,5,7-tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate
  • Benzoic acid, 2-(2,4,5,7-tetrabromo-6-hydroxy-3-oxo-3H-xanthen-9-yl)-,ethyl ester, potassium salt
  • C.I. Solvent Red 45
  • Eosin alcohol soluble
  • potassium, 2,4,5,7-tetrabromo-9-(2-ethoxycarbonylphenyl)-6-oxoxanthen-3-olate
  • C.I. 45386
  • alcohol soluble eosin
  • potassium 2,4,5,7-tetrabromo-9-[2-(ethoxycarbonyl)phenyl]-3-oxo-3h-xanthen-6-olate
  • EOSIN ETHYL
  • C22H11Br4KO5
  • Ethyl Eosin certified , for Microscopical Staining
  • Ethyl eosin, certified by the Biological Stain Commission
  • potassium 2,4,5,7-tetrabromo-9-{2-[(ethyloxy)carbonyl]phenyl}-3-oxo-3H-xanthen-6-olate
  • Potassium methyl o-(2,4,5,7-tetrabromo-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate
  • potassium, 2,4,5,7-tetrabromo-9-(2-ethoxycarbonylphenyl)-6-oxo-xanthen-3-olate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
714.04 g/molcalc.
Exact mass
709.6977 Dacalc.
LogP (octanol/water)
3.87calc.
Topological polar surface area
79.57 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
3calc.
Heavy atoms
32calc.
Rings
4calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.09calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (1 violation)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1ccc2c(-c3ccccc3)c3ccccc3oc-2c1

O=c1ccc2c(-c3ccccc3)c3ccccc3oc-2c1

4 rings, 21 atoms.

166 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Ethyl eosin suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 4 suppliers
4 of 4 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

4 suppliers in 2 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Ethyl eosin price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Roles

  • dye
  • fluorescent dye
  • fluorochrome
  • histological dye
  • pharmaceutical
  • photosensitizing agent

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Ethyl eosin is traded under.

HS 3204.19Indicative HS code

Synthetic organic colouring matter and preparations based thereon as specified in note 3…

World exports in 2024
$1.08B
+0.2% vs 2023, imports $1.14B
2019 to 2024
Top exporters
  1. United States23.7%
  2. India * partner reported12.4%
  3. China9.0%
Top importers
  1. Germany7.5%
  2. France * partner reported6.4%
  3. Mexico5.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Ethyl eosin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Ethyl eosin, based on the data on this page

What is Ethyl eosin?

Ethyl eosin is an organic potassium salt having 2,4,5,7-tetrabromo-9-{2-[(ethyloxy)carbonyl]phenyl}-3-oxo-3H-xanthen-6-olate as the counterion. It has a role as a photosensitizing agent, a fluorochrome and a histological dye. It contains an ethyl eosin anion.

What is the CAS number of Ethyl eosin?

The CAS registry number of Ethyl eosin is 6359-05-3. Other or deprecated CAS numbers: 6359-04-2.

What is the molecular formula and weight of Ethyl eosin?

The molecular formula of Ethyl eosin is C22H11Br4KO5 and its molar mass is 714.04 g/mol.

What is Ethyl eosin used for?

Known uses and roles of Ethyl eosin include indicators and stains in research and laboratory, dye, fluorescent dye, fluorochrome, histological dye and 2 more.

Is Ethyl eosin hazardous?

No GHS hazard classification for Ethyl eosin is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Ethyl eosin?

Ethyl eosin is usually classified under HS code 320419 (Synthetic organic colouring matter and preparations based thereon as specified in note 3…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Ethyl eosin?

CompoundList lists 4 suppliers of Ethyl eosin in India and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Ethyl eosin in India?

2 suppliers in India list Ethyl eosin on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Ethyl eosin?

Suppliers quote Ethyl eosin on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Ethyl eosin

Get quotes for Ethyl eosin

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Ethyl eosin
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Ethyl eosin with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/ethyl-eosin-6359-05-3" title="Ethyl eosin structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Fluorescent dyes and stains or HS code 320419

4 suppliers
Free quotes, contact stays private
Get quotes