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Giemsa Stain Powder is a laboratory biological stain used to differentiate cellular structures in prepared blood films and other suitable microscopy specimens. Commercial Giemsa stain is a formulated dye mixture rather than a single pure molecular substance; its staining behaviour depends on the formulation and the staining protocol. It is widely used in haematology teaching, microscopy practicals, and selected parasitology and cytology workflows to improve contrast between cell components. The powder is generally dark green to green-black and is used to prepare staining solutions according to an established method. Select the product for the intended microscopy procedure and follow the supplier’s technical instructions, laboratory quality practices, and applicable safety procedures.
Product Specifications
| Specification | Details |
|---|---|
| Appearance | Dark green to green-black powder |
| Assay | 99% |
| Chemical Name | Giemsa stain powder (formulated dye mixture) |
| Alternate Names | Giemsa’s stain; Azure mixture sicc. |
| Molecular Formula | Not applicable; formulated mixture |
| Empirical Formula | Not applicable; formulated mixture |
| CAS Number | 51811-82-6 (commonly listed for Giemsa stain) |
| Molecular Weight | Not applicable to the complete mixture |
| Grade | LR Laboratory Reagent |
Key Features of Giemsa Stain Powder
- Formulated biological stain supplied as a powder for preparation of staining solutions.
- Used to provide differential contrast in appropriately prepared microscopy specimens.
- Commonly applied in blood-film staining and selected parasitology microscopy procedures.
- Useful for supervised microscopy practicals and laboratory training when the method is validated for the specimen.
- Staining results depend on formulation, solution preparation, specimen preparation, and staining conditions.
Laboratory Applications of Giemsa Stain Powder
- Teaching demonstrations involving prepared peripheral blood films, using an established staining protocol.
- Haematology laboratory microscopy for differentiation of cellular elements in suitable blood-film specimens.
- Parasitology microscopy for visualisation of blood-borne parasites in suitable thin or thick films.
- Research microscopy involving suitable cytological or cellular specimens where Giemsa staining is an established method.
- Preparation of working stain solutions for laboratory procedures, following the product instructions and the laboratory’s validated method.
Why Choose Lab Wale to Buy Giemsa Stain Powder
Lab Wale supports laboratory purchasing for schools, colleges, universities, research centres, and laboratory professionals by providing a convenient source for laboratory chemicals and scientific supplies. Before purchasing Giemsa Stain Powder, check the product identity, intended use, stated grade, and available technical or safety information to ensure the material matches the procedure. Selecting the correct chemical form and following the relevant laboratory method are important for reliable and appropriate use.
Frequently Asked Questions About Giemsa Stain Powder
What is Giemsa Stain Powder used for in laboratories?
It is used to prepare staining solutions for microscopy, especially for prepared blood films and selected parasitology specimens. The exact application depends on the stain formulation, specimen type, and validated staining protocol.
Is Giemsa stain a single pure chemical?
Commercial Giemsa stain is generally a formulated mixture of dyes rather than one pure compound. A single molecular formula or molecular weight therefore does not accurately describe the complete powder formulation.
What is the CAS number for Giemsa stain?
CAS 51811-82-6 is commonly listed for Giemsa stain. Because commercial formulations can differ, confirm that the identifier and product documentation match the specific stain being purchased.
How is Giemsa stain powder prepared for microscopy?
It is used to prepare a working staining solution according to the supplier’s instructions and the laboratory’s established method. Solvent, buffer, concentration, staining time, and rinsing conditions should not be assumed to be interchangeable across protocols.
How should Giemsa Stain Powder be handled and stored?
Keep the container tightly closed in a cool, dry, well-ventilated storage area and follow the product SDS for specific conditions. Avoid generating or inhaling dust, prevent eye and skin contact, use suitable PPE, and manage waste under institutional procedures.
Storage Conditions for Giemsa Stain Powder
Store the powder in a tightly closed, clearly labelled container in a cool, dry place, protected from moisture and incompatible materials. Keep it in its original compatible packaging and follow the supplier’s current SDS for any product-specific temperature, ventilation, or segregation requirements.
Precautions for Handling Giemsa Stain Powder
Review the current Safety Data Sheet before use. Avoid creating or inhaling dust and prevent contact with eyes and skin; wear suitable laboratory gloves, protective clothing, and eye protection. Handle powders with appropriate ventilation, prepare solutions using the specified procedure, and follow institutional spill-response and chemical-waste rules.


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