Oil Red EGN
Oil Red EGN (CAS: 4477-79-6), with the empirical formula C25H22N4O and a molecular weight of 394.47 g/mol, is a diazo dye. It is recognised by its Colour Index Number 26120. This compound serves as a vital stain in biological and histological applications, particularly for the visualisation of lipids and fat-soluble substances within cellular structures.
- IUPAC
- Solvent Red 26

Lipid Staining in Histology
Oil Red EGN is widely employed as a fat-soluble stain in histological preparations. It effectively demonstrates the presence and distribution of neutral lipids and lipoproteins in tissue sections, aiding in the study of metabolic processes and pathological conditions related to fat accumulation.
Cell Biology Research
In cell biology, this dye is used to identify and quantify intracellular lipid droplets. Its ability to selectively stain lipid-rich organelles makes it an invaluable tool for investigating cellular differentiation, lipid metabolism, and the effects of various treatments on cellular lipid content.
Diagnostic Staining
The stain's specificity for lipids allows for its application in diagnostic procedures where the detection of fatty changes in tissues is clinically relevant. It aids in the microscopic examination of tissue biopsies for conditions such as steatosis.
| Molecular weight | 394.47 |
|---|---|
| Empirical formula | C25H22N4O |
| Melting point | 130 °C (dec.)(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 26120 |
|---|---|
| Absorption | λmax 521 nm |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Oil Red EGN used for?
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Oil Red EGN is primarily used as a stain in histology and cell biology to visualise and identify lipids and fat-soluble substances within cells and tissues.
What are the CAS number and formula for Oil Red EGN?
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The CAS number for Oil Red EGN is 4477-79-6, and its empirical formula is C25H22N4O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Oil Red EGN as a laboratory reagent, suitable for research and analytical purposes. Specific purity details and assay are available upon request, and TSS does not represent this product as USP, BP, or EP grade.
How should Oil Red EGN be handled safely?
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Oil Red EGN is classified with warning signal words and carries hazard statements for skin irritation (H315), eye irritation (H319), and respiratory tract irritation (H335). Handling requires appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves, in a well-ventilated area.
How is Oil Red EGN packed, shipped, and exported?
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Tech Serve Solutions ensures that Oil Red EGN is carefully packed according to international shipping regulations for chemical substances. We handle global export logistics with expertise, adhering to all necessary compliance standards.
How can I request a sample or quote for Oil Red EGN?
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To request a sample or a formal quotation for Oil Red EGN, please contact our sales team through the website or directly via email, providing your specific requirements.
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