Fat Brown B
Fat Brown B (CAS 6535-42-8, C18H16N2O2) is a synthetic organic compound with a molecular weight of 292.33 g/mol. It is recognised by its Colour Index Number 12010 and MDL number MFCD00009691. Primarily utilised as a stain and dye, Fat Brown B finds applications in cell biology, hematology, and histology for the purpose of specimen staining and visualisation, contributing to accurate microscopic analysis and research.
- IUPAC
- Solvent red 3
- Synonyms
- Solvent red 3

Histology and Hematology Staining
Fat Brown B serves as a stain in histological and hematological preparations. It aids in differentiating cellular structures and components within tissue samples and blood smears, facilitating microscopic examination and diagnosis.
Cell Biology Research
In cell biology, this compound is employed as a dye for visualising cellular components and processes. Its properties allow for the selective staining of specific cellular elements, supporting research into cell morphology and function.
General Staining Applications
As a versatile dye (Colour Index 12010), Fat Brown B is applicable across various microscopic staining techniques. It is used in laboratories for general staining purposes where a specific colouration of biological samples is required.
| Molecular weight | 292.33 |
|---|---|
| Empirical formula | C18H16N2O2 |
| Colour Index Number | 12010 |
|---|
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 Fat Brown B used for?
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Fat Brown B is primarily used as a stain in cell biology, hematology, and histology for microscopic examination and visualisation of cellular and tissue structures.
What are the CAS number and formula for Fat Brown B?
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The CAS number for Fat Brown B is 6535-42-8 and its empirical formula is C18H16N2O2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Fat Brown B primarily for research and laboratory use. The specific assay and grade available are detailed in the product specifications. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
What are the safety considerations when handling Fat Brown B?
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Fat Brown B is classified with WGK Germany 3, indicating a high hazard level. Handle with appropriate personal protective equipment, including gloves, eye protection, and lab coats, in a well-ventilated area to avoid exposure.
How is Fat Brown B packed and exported?
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Fat Brown B is carefully packed according to industry standards to ensure safe transit and is available for export globally by Tech Serve Solutions.
How can I request a sample or quote for Fat Brown B?
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To request a sample or obtain a quote for Fat Brown B, please contact our sales department via the website or direct email, providing your contact details and required quantity.
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