Chicago Sky Blue 6B
Chicago Sky Blue 6B (CAS: 2610-05-1) is a synthetic organic dye with the molecular formula C34H24N6Na4O16S4 and a molecular weight of 992.80 g/mol. This direct dye, also known by its Colour Index designation C.I. Direct Blue 1, is recognised for its utility in various staining applications within biological and histological contexts. It is soluble in water, facilitating its use in aqueous solutions for laboratory procedures.
- IUPAC
- Direct Blue 1,Pontamine sky blue
- Synonyms
- Direct Blue 1Pontamine sky blue

Cell Biology Staining
Chicago Sky Blue 6B serves as a stain in cell biology, aiding in the visualisation and differentiation of cellular structures under microscopy. Its properties make it suitable for general cellular staining protocols.
Histology and Hematology
This dye is employed in histological and hematological preparations. It helps in staining tissue sections and blood smears, contributing to diagnostic procedures by highlighting cellular components and morphology.
Laboratory Reagent
As a laboratory reagent, Chicago Sky Blue 6B is utilised in research and analytical settings. Its defined chemical properties and solubility characteristics support its application in various experimental protocols.
| Molecular weight | 992.80 |
|---|---|
| Empirical formula | C34H24N6Na4O16S4 |
| Solubility | H2O: soluble1 mg/mL |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22 |
| Safety statements (S) | 22-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 24410 |
|---|
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 Chicago Sky Blue 6B used for?
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Chicago Sky Blue 6B is primarily used as a stain in cell biology, histology, and hematology. It is also employed as a general laboratory reagent for various analytical and research purposes.
What is the CAS number and formula for Chicago Sky Blue 6B?
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The CAS number for Chicago Sky Blue 6B is 2610-05-1, and its empirical formula is C34H24N6Na4O16S4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Chicago Sky Blue 6B as a research-grade chemical. The specific assay and purity details are available upon request, and TSS does not represent this product as USP, BP, EP, or any pharmacopoeia standard.
What are the primary safety concerns when handling Chicago Sky Blue 6B?
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Chicago Sky Blue 6B is classified as harmful if swallowed (H302) and harmful in contact with skin (H312). Appropriate personal protective equipment, including gloves and eye protection, should be worn. Handle in a well-ventilated area and avoid dust formation. Refer to the Safety Data Sheet (SDS) for comprehensive handling information.
Is Chicago Sky Blue 6B available for international export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Chicago Sky Blue 6B. We can facilitate international shipments according to regulatory requirements.
How can I request a sample or quote for Chicago Sky Blue 6B?
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To request a sample or a quotation for Chicago Sky Blue 6B, please contact our sales department through the website or via direct email, providing your specific requirements and shipping details.
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