Oil Red EGN is a solvent dye used to color oils, waxes, greases, fats, hydrocarbons derivatives, polishes, and acrylic emulsions. Dyes like Oil Red EGN contain azo-structures and usually produce yellow-red coloration whereas those based on anthraquinones tend to be green-blue. Other examples besides Oil Red EGN include heterocyclic rings, metal complex, pyrazolone, xanthene, and ketoamine. Solvent dyes such as Oil Red EGN do not ionize.

Specifications

Synonyms

Specifications & Purity

≥85%

Biochemical and Physiological Mechanisms

Oil Red EGN is widely used for staining triglyceride droplets. However, it does not have an advantage in staining larger droplets

Storage

Room temperature

Shipped In

Normal

Purity

≥85%

Product Properties

pKa	pKₐ: 13.52 (Predicted)

Names and Identifiers

Pubchem Sid	488183586
Pubchem Sid Url	https://pubchem.ncbi.nlm.nih.gov/substance/488183586
Canonical Smiles	CC1=CC=CC=C1N=NC2=C(C=C(C(=C2)C)N=NC3=C(C=CC4=CC=CC=C43)O)C
IUPAC Name	1-[[2,5-dimethyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol
InChIKey	NRBKWAQSLYBVSG-UHFFFAOYSA-N
INCHI	1S/C25H22N4O/c1-16-8-4-7-11-21(16)26-27-22-14-18(3)23(15-17(22)2)28-29-25-20-10-6-5-9-19(20)12-13-24(25)30/h4-15,30H,1-3H3
Isomeric SMILES	CC1=CC=CC=C1N=NC2=C(C=C(C(=C2)C)N=NC3=C(C=CC4=CC=CC=C43)O)C
WGK Germany	3
Molecular Weight	394.47
Reaxy-Rn	43508917
Reaxys-RN_link_address	https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=43508917&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

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✅ Certificate of Analysis (COA)

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

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

Kingdom Organic compounds
- Superclass Organoheterocyclic compounds
  - Class Azobenzenes

Kingdom	Organic compounds
Superclass	Organoheterocyclic compounds
Class	Azobenzenes
Subclass	Not available
Intermediate Tree Nodes	Not available
Direct Parent	Azobenzenes
Alternative Parents	Naphthols and derivatives p-Xylenes Toluenes 1-hydroxy-2-unsubstituted benzenoids Azo compounds Propargyl-type 1,3-dipolar organic compounds Organooxygen compounds Hydrocarbon derivatives
Molecular Framework	Aromatic homopolycyclic compounds
Substituents	Azobenzene - 2-naphthol - Naphthalene - P-xylene - Xylene - 1-hydroxy-2-unsubstituted benzenoid - Phenol - Toluene - Monocyclic benzene moiety - Benzenoid - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organonitrogen compound - Hydrocarbon derivative - Organic oxygen compound - Organooxygen compound - Organic nitrogen compound - Aromatic homopolycyclic compound
Description	This compound belongs to the class of organic compounds known as azobenzenes. These are organonitrogen aromatic compounds that contain a central azo group, where each nitrogen atom is conjugated to a benzene ring.
External Descriptors	Not available
1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61. DOI: 10.1186/s13321-016-0174-y

3D Structure

Associated Targets(Human)

A498 (42825 Activities)

Lot Number	Certificate Type	Date	Item
D2308305	Certificate of Analysis	Jan 20, 2026	O331151
D2308315	Certificate of Analysis	Jan 20, 2026	O331151
D2308322	Certificate of Analysis	Jan 20, 2026	O331151
D2308304	Certificate of Analysis	Feb 21, 2023	O331151
E2516611	Certificate of Analysis	Feb 21, 2023	O331151

Refractive Index	n20D1.64 (Predicted)
Boil Point(°C)	~628.8° C at 760 mmHg (Predicted)
Melt Point(°C)	130° C (lit.)(dec.)
Molecular Weight	394.500 g/mol
XLogP3	7.500
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	4
Exact Mass	394.179 Da
Monoisotopic Mass	394.179 Da
Topological Polar Surface Area	69.700 Å²
Heavy Atom Count	30
Formal Charge	0
Complexity	608.000
Isotope Atom Count	0
Defined Atom Stereocenter Count	0
Undefined Atom Stereocenter Count	0
Defined Bond Stereocenter Count	0
Undefined Bond Stereocenter Count	0
The total count of all stereochemical bonds	0
Covalently-Bonded Unit Count	1

Oil Red EGN - ≥85% , CAS No.4477-79-6

Why this grade

Storage & shipping

Quality documents

Literature proof

Overview

Specifications

Documentation

📋 Safety Data Sheet (SDS)

✅ Certificate of Analysis (COA)

📊 Datasheet

🔬 Specification Sheet

Advanced Data

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Dilution Calculator

Reconstitution Calculator

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