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Thermo Scientific™ Giemsa's stain, pure, high purity biological stain
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Specifications:
| Application | microscopy | ||
| Storage Temperature | Ambient | ||
| Product Type | Dye | Forms | Powder |
| Product Brand | Thermo Fisher Scientific™, thermo Scientific | ||
| Product Grade | Microbiology grade | Formula | C₁₄H₁₄ClN₃S |
High-Purity Biological Stain for Histology, Hematology, and Cytogenetics
Thermo Scientific™ Giemsa’s Stain, Pure is a high-quality, crystalline stain designed for precise cellular differentiation in microscopy. Composed of 7-amino-N,N-dimethylphenothiazin-3-iminium chloride, this stain delivers reliable and consistent performance in clinical and research laboratories. It is widely used in hematology for staining blood and bone marrow smears, in cytogenetics for G-banding of chromosomes, and in parasitology for the detection of Plasmodium species in malaria diagnostics.
With superior specific absorbance values and minimal impurities, Giemsa’s stain ensures excellent contrast between nuclei and cytoplasm, enabling accurate interpretation of cell morphology and structure.
Key Features & Benefits
- ✅ High Purity Grade – Suitable for sensitive microscopy and diagnostic use
- ✅ Exceptional Contrast – Enhances chromatin and cytoplasmic detail
- ✅ Strong Absorbance – A (1%/1cm) ≥950 in methanol, ensuring high staining intensity
- ✅ Validated Identity – Conforms to IR spectral standards for chemical consistency
- ✅ Ready for Standard Protocols – Reliable performance in Giemsa and Romanowsky-type staining methods
Technical Specifications
| Property | Value |
|---|---|
| Chemical Name (IUPAC) | 7-amino-N,N-dimethyl-3H-phenothiazin-3-iminium chloride |
| Molecular Formula | C₁₄H₁₄ClN₃S |
| Molecular Weight | 291.80 g/mol |
| CAS Number | 51811-82-6 |
| Synonym | 7-amino-N,N-dimethylphenothiazin-3-iminium chloride |
| Appearance (Form) | Crystalline powder or crystals |
| Appearance (Color) | Dark green to black |
| Specific Absorbance A (1%/1cm) | ≥950 in MeOH (dried substance) |
| Loss on Drying | ≤10% (at 110 °C) |
| UV λmax | 640–650 nm and 520–525 nm (in methanol) |
| Infrared Spectrum | Conforms |
Applications
- Differential staining of blood and bone marrow smears
- Cytogenetic analysis (e.g., G-banding for karyotyping)
- Detection of blood-borne parasites (e.g., Plasmodium species)
- Histological staining of paraffin-embedded tissues
- Cytological evaluation of clinical specimens
Thermo Scientific™ Giemsa’s Stain, Pure offers uncompromising quality and precision for laboratories requiring accurate and reproducible staining results. Its high purity, consistent formulation, and compatibility with standardized staining procedures make it an essential reagent for hematologists, pathologists, and microbiologists. Whether used in routine diagnostics or advanced research, this stain ensures clarity, contrast, and confidence in every microscopic examination.
- Pack Size: 5g 25g