Azure C
Azure C (CAS: 531-57-7, C13H12ClN3S) is a versatile synthetic dye supplied by Tech Serve Solutions. With a molecular weight of 277.77 g/mol, this compound is primarily recognised for its applications in microscopy and staining. It serves as a key reagent in biological and histological staining techniques, aiding in the visualisation of cellular structures. Available in a grade suitable for microbiology, Azure C is a staple for researchers and laboratories.
- IUPAC
- N-Methylthionine
- Synonyms
- N-Methylthionine

Histological Staining
Azure C is employed as a stain in histology to differentiate cellular components and tissues. Its affinity for nucleic acids allows for the visualisation of cell nuclei and cytoplasm in prepared slides.
Microbiological Staining
Utilised in microbiology for staining bacterial cells and other microorganisms. This application aids in the identification and classification of microbial species through differential staining techniques.
Cell Biology Research
Serves as a vital reagent in cell biology laboratories for staining cellular structures and observing cellular processes. It is valuable for studies involving cell morphology and dynamics.
| Molecular weight | 277.77 |
|---|---|
| Empirical formula | C13H12ClN3S |
| Grade | for microbiology |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 Azure C used for?
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Azure C (CAS: 531-57-7) is used as a stain in histology, microbiology, and cell biology research to visualise cellular structures and components. It is particularly useful for staining nucleic acids and differentiating tissues.
What is the CAS number and formula for Azure C?
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The CAS number for Azure C is 531-57-7 and its empirical formula is C13H12ClN3S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Azure C in a grade suitable for microbiology. We do not represent this product as USP, BP, or EP grade.
How should Azure C be handled safely?
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Handling Azure C requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if airborne exposure is possible. Consult the safety data sheet for comprehensive handling information.
How is Azure C shipped and exported?
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Tech Serve Solutions, established in 1998, is a specialist global supplier and exporter of fine chemicals like Azure C, adhering to all relevant shipping and export regulations.
How can I request a sample or quote for Azure C?
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To request a sample or obtain a quote for Azure C, please contact our sales department through the website or by phone.
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