Molekula
Wright's stain
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Wright's stain is a histological stain used for differential staining of blood smears, enabling clear visualization of cellular components such as nuclei and cytoplasm. It contains a mixture of methylene blue, eosin, and other dyes, with the active component having the CAS number 68988-92-1, molecular formula C36H27Br4N3O5S, and molecular weight 933.30 g/mol. Store at ambient temperature. Signal word: Warning.
Molekula supplies Wright's stain in 25 g and 100 g packs, from £37.08 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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 — £30.90 per pack ex VAT · £37.08 inc. VAT
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100 g — £80.00 per pack ex VAT · £96.00 inc. VAT
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 powder |
| Loss on Drying | ≤ 10% |
| Solubility | Clear blue solution with greenish fluorescence (0.1% MeOH) |
| Absorptivity | 1%/1cm @Lambda max 644.4nm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 57163864 |
| CAS Number | 68988-92-1 |
| Molecular Formula | C36H27Br4N3O5S |
| Molecular Weight | 933.30 |
| SMILES | CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.C1=CC=C(C(=C1)C2=C3C=C(C(=C(C3=[O+]C4=C(C(=C(C=C24)Br)O)Br)Br)O)Br)C(=O)O |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P332+313 IF skin irritation occurs: 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Wright's stain used for?
Wright's stain is used for staining blood smears to differentiate various types of blood cells in diagnostic hematology.
What is the chemical formula and molecular weight of Wright's stain?
The formula is C36H27Br4N3O5S with a molecular weight of 933.30 g/mol.
How should Wright's stain be stored?
Store at ambient temperature; avoid exposure to light and moisture.
What grade of Wright's stain is available?
The specification does not name a grade. It covers appearance (dark green powder), loss on drying (≤ 10%), solubility (clear blue solution with greenish fluorescence at 0.1% in methanol) and absorptivity (1%/1cm at lambda max 644.4 nm). Please contact Molekula for further grade details.
Can Molekula supply Wright's stain in bulk?
Yes, Molekula can supply Wright's stain in bulk quantities—please contact sales for details.
What documentation comes with a Wright's stain order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Where can I buy Wright's stain?
Directly from Molekula, which lists Wright's stain in 25 g and 100 g packs from £37.08 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.