Nuclear Fast Red
Nuclear Fast Red (CAS: 6409-77-4) is a synthetic organic compound with the empirical formula C14H8NNaO7S and a molecular weight of 357.27 g/mol. It is identified by its Colour Index Number 60760. This substance is primarily utilised as a biological stain in various laboratory applications, particularly within cell biology, hematology, and histology for its staining properties.
- IUPAC
- 4-Amino-9,10-dihydro-1,3-dihydroxy-9,10-dioxo-2-anthracenesulfonic acid sodium salt,Calcium Red
- Synonyms
- Calcium Red

Biological Staining
Nuclear Fast Red serves as a biological stain, commonly employed in histology and cell biology for the differential staining of cellular components. It is particularly useful for visualizing specific structures within tissue samples.
Hematology Applications
In hematology, this stain is applied for the microscopic examination of blood cells and tissues. Its specific binding properties aid in the identification and differentiation of various blood cell types.
Histological Staining
This compound is a valuable reagent in histology for staining tissue sections. It facilitates the observation of cellular morphology and tissue architecture, aiding in diagnostic pathology.
Calcium Determination
Nuclear Fast Red is suitable for the determination of calcium, indicating its utility in certain analytical and diagnostic procedures where calcium levels are of interest.
| Molecular weight | 357.27 |
|---|---|
| Empirical formula | C14H8NNaO7S |
| Application | Used as a biological stain |
| Suitability | suitable for determination of calcium |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Colour Index Number | 60760 |
|---|---|
| Shelf Life | (Expiry date on the label) |
| Ivd | for in vitro diagnostic use |
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 Nuclear Fast Red used for?
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Nuclear Fast Red is primarily used as a biological stain in cell biology, hematology, and histology. It is also suitable for the determination of calcium.
What are the CAS number and formula for Nuclear Fast Red?
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The CAS number for Nuclear Fast Red is 6409-77-4, and its empirical formula is C14H8NNaO7S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Nuclear Fast Red as indicated by its specifications. We do not represent this product as USP, BP, EP, or pharmacopoeia grade unless explicitly stated in the product documentation.
How should Nuclear Fast Red be handled safely?
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Nuclear Fast Red is classified with GHS07 signal word 'Warning' and hazard statements H315, H319, and H335. Handle with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. Ensure good ventilation and avoid dust formation.
Is Nuclear Fast Red available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Nuclear Fast Red, for in vitro diagnostic use.
How can I request a quote or sample?
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To request a quote or a sample of Nuclear Fast Red, please contact our sales team through the website or by phone.
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