Molekula
Giemsa Stain
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Giemsa Stain is a Romanowsky-type dye mixture used primarily in hematology for blood smear staining, enhancing the contrast of cellular components like white blood cells, malaria parasites, and bacteria. It is also applied in histology and microbiology for differential staining of tissues and microorganisms. This chemical has a CAS number of 51811-82-6, with the molecular formula C14H14ClN3S and a molecular weight of 291.80 g/mol. It is stored at ambient conditions and carries a signal word of "Warning" for safety. Molekula supplies Giemsa Stain from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — $147.70 per pack
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50 g — $237.50 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Dark green solid |
| Loss on Drying | ≤ 10.0% |
| Specific Absorption (E 1%/1cm) at λ max1 | ≥ 600 |
| Specific Absorption (E 1%/1cm) at λ max2 | ≥ 950 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 300 °C |
Source: PubChem CID 13735 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 48872073 |
| CAS Number | 51811-82-6 |
| IUPAC Name | (7-aminophenothiazin-3-ylidene)-dimethylazanium chloride |
| EC Number | 208-510-7 |
| Molecular Formula | C14H14ClN3S |
| Molecular Weight | 291.80 |
| Exact Mass | 291.0597 |
| SMILES | C[N+](=C1C=CC2=NC3=C(C=C(C=C3)N)SC2=C1)C.[Cl-] |
| InChIKey | NALREUIWICQLPS-UHFFFAOYSA-N |
| InChI | InChI=1S/C14H13N3S.ClH/c1-17(2)10-4-6-12-14(8-10)18-13-7-9(15)3-5-11(13)16-12;/h3-8,15H,1-2H3;1H |
| PubChem CID | 13735 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H319 Causes serious eye irritation
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 3-Amino-7-(dimethylamino)phenothiazin-5-ium chloride
- Azur A
- AZURE A
- Azure A chloride
- C.I. 52005
- Dimethylthionine
- Giemsa's stain
- N,N-Dimethylthionine
- Phenothiazin-5-ium, 3-amino-7-(dimethylamino)-, chloride
- Stain, Giemsa
Frequently asked questions
What is Giemsa Stain primarily used for?
Giemsa Stain is commonly used in histology and hematology for staining blood smears, bone marrow samples, and cytological preparations to differentiate cellular components under a microscope.
What is the chemical formula and molecular weight of Giemsa Stain?
The chemical formula is **C14H14ClN3S**, and the molecular weight is **291.80 g/mol**.
How should Giemsa Stain be stored?
Store Giemsa Stain at **ambient temperature** in a dry, well-ventilated area, away from direct sunlight and incompatible substances.
What grade or purity level is available for Giemsa Stain?
Molekula supplies Giemsa Stain in **analytical and reagent-grade purity**, suitable for laboratory staining applications.
Can Molekula supply Giemsa Stain in bulk quantities?
Yes, we offer bulk packaging options for Giemsa Stain—please contact our sales team for custom quantities and pricing.
What documentation comes with an order of Giemsa Stain?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.