Quinaldine Red
Quinaldine Red (CAS: 117-92-0), a cationic dye with the molecular formula C21H23IN2 and a molecular weight of 430.33 g/mol, is primarily recognised as an indicator. Its utility extends to analytical chemistry, particularly in non-aqueous titrations, and it finds applications in histology and cell biology as a staining agent. This compound offers reliable performance for specific chemical analysis and biological staining protocols.
- IUPAC
- 2-(4-Dimethylaminostyryl)-1-ethylquinolinium iodide
- Synonyms
- 2-(4-Dimethylaminostyryl)-1-ethylquinolinium iodide

Non-Aqueous Titration Indicator
Quinaldine Red serves as a valuable indicator in non-aqueous titrations, facilitating the accurate determination of endpoint in various chemical analyses where aqueous systems are unsuitable.
Histological Staining
In histology and cell biology, Quinaldine Red is employed as a dye for staining tissues and cells. Its chromatic properties aid in visualizing cellular structures under microscopy.
Analytical Reagent
As an analytical reagent, Quinaldine Red is utilised in laboratory settings for specific chemical testing and qualitative analysis, contributing to research and quality control processes.
| Molecular weight | 430.33 |
|---|---|
| Empirical formula | C21H23IN2 |
| Composition | Dye content, 95% |
| Absorption | λmax 528 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 Quinaldine Red used for?
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Quinaldine Red is used as an indicator in non-aqueous titrations and as a stain in histology and cell biology.
What is the CAS number and chemical formula for Quinaldine Red?
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The CAS number for Quinaldine Red is 117-92-0, and its chemical formula is C21H23IN2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Quinaldine Red with a dye content of 95%. We do not represent this product as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated in the product documentation.
What are the safety considerations when handling Quinaldine Red?
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Quinaldine Red is classified with a WGK Germany rating of 3, indicating it is hazardous to water. Appropriate personal protective equipment should be used, and handling should occur in well-ventilated areas to avoid exposure.
How is Quinaldine Red packed and shipped?
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Quinaldine Red is carefully packed to ensure stability during transit. As a global supplier, Tech Serve Solutions complies with all relevant international shipping regulations for chemical exports.
How can I request a quote or sample for Quinaldine Red?
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To request a quote or sample, please contact our sales department through the website or by direct inquiry, providing the product name and CAS number.
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