Molekula
Bismarck Brown R (CI 21010) Dc
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
Bismarck Brown R (CI 21010) is a diazo dye primarily used for staining biological tissues, particularly in histology, where it stains mucins, cartilage and mast cells and serves as a counterstain. It appears as a dark brown powder soluble in water, ethanol, and glycerol. This product has a CAS number of 5421-66-9, a molecular weight of 461.39 g/mol, and requires storage at ambient conditions. The signal word is Warning, indicating moderate hazard. Molekula supplies Bismarck Brown R 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 |
|---|---|
| Storage Temperature | +20 ° C |
| Strength | 100% +/- 5% |
| Shade | Within visual tolerances |
| Solubility in water | Soluble |
| Description | Powder |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 27812851 |
| CAS Number | 5421-66-9 |
| Molecular Formula | 5421-66-9 |
| Molecular Weight | 461.39 |
| SMILES | CC1=C(C=C(C=C1)N=NC2=C(C=C(C(=C2)C)N)N)N=NC3=C(C=C(C(=C3)C)N)N.Cl.Cl |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2927005000 |
| Tariff Code | 2927000090 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H303 May be harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H351 Suspected of causing cancer
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
No alternate names recorded for this product.
Frequently asked questions
What is Bismarck Brown R (CI 21010) used for?
Bismarck Brown R is primarily used as a dye in histological staining, particularly for staining collagen and connective tissues in biological samples.
What is the molecular formula and molecular weight of Bismarck Brown R?
The molecular formula is C21H24N8·2HCl and the molecular weight is 461.39 g/mol (CAS 5421-66-9).
How should Bismarck Brown R be stored?
Store at ambient temperature in a tightly sealed container, away from direct sunlight and moisture.
What grades or purities of Bismarck Brown R does Molekula supply?
Molekula supplies analytical grade Bismarck Brown R (CI 21010) for research and laboratory applications.
Can Molekula supply Bismarck Brown R in bulk quantities?
Yes, bulk quantities are available upon request—contact our sales team for pricing and lead times.
What documentation comes with an order of Bismarck Brown R?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation.
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.