Azure II
Azure II (CAS 37247-10-2) is a complex stain with the linear formula C16H18N3S · C15H16N3S ·2 Cl and a molecular weight of 625.68 g/mol. This compound serves as a vital diagnostic tool, primarily utilised for staining biological specimens in cell biology, hematology, and histology. Its precise formulation allows for clear visualisation of cellular structures and tissues, making it indispensable in research and diagnostic laboratories.

Cell Biology Staining
Azure II is employed for staining various cellular components, aiding in the microscopic examination of cell morphology and function. It is particularly useful in distinguishing different organelles and cellular structures.
Hematology Applications
In hematology, Azure II is used for differential staining of blood cells, assisting in the identification and classification of leukocytes and erythrocytes. It helps in diagnosing blood disorders by highlighting cellular abnormalities.
Histology Sample Preparation
This stain is applied in histology for the preparation of tissue sections. It enables researchers and pathologists to visualise tissue architecture and cellular details for diagnostic purposes.
| Molecular weight | 625.68 |
|---|---|
| Linear formula | C16H18N3S · C15H16N3S ·2 Cl |

Hazard statements
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-41-52/53 |
| Safety statements (S) | 26-39-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 52010/52015 |
|---|
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 II used for?
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Azure II is primarily used as a stain in cell biology, hematology, and histology for microscopic examination of cells and tissues.
What is the CAS number and formula for Azure II?
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The CAS number for Azure II is 37247-10-2, and its linear formula is C16H18N3S · C15H16N3S ·2 Cl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Azure II as a technical or research grade chemical. We do not represent it as USP, BP, or EP grade.
How should Azure II be handled safely?
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Azure II is classified as dangerous to the eyes (H318). When handling, it is essential to wear eye protection (eyeshields), gloves, and a dust mask type N95 (US). Avoid generating dust and ensure adequate ventilation.
Is Azure II available for export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Azure II, and can assist with international orders.
How can I request a sample or quote for Azure II?
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To request a sample or a quote for Azure II, please contact our sales team through the website or by phone. Provide the product name and CAS number for prompt service.
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