Molekula
Coomassie brilliant blue R-250 (C.I. 42660)
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
Coomassie brilliant blue R-250 (C.I. 42660) is a blue dye commonly used for protein staining in SDS-PAGE and other electrophoretic techniques. It binds to proteins via hydrophobic and ionic interactions, enabling visualization of protein bands. Available in powder form with a molecular weight of 825.97 g/mol, its CAS number is 6104-59-2, and its molecular formula is C45H44N3NaO7S2. Stable at ambient temperature with no signal word. Molekula supplies Coomassie brilliant blue R-250 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.
-
5 g — £22.00 per pack ex VAT · £26.40 inc. VAT
-
25 g — £34.10 per pack ex VAT · £40.92 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 | Blue to dark blue powder |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 24234073 |
| CAS Number | 6104-59-2 |
| IUPAC Name | sodium 3-[[4-[[4-(4-ethoxyanilino)phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-N-ethylanilino]methyl]benzenesulfonate |
| EC Number | 228-060-5 |
| Molecular Formula | C45H44N3NaO7S2 |
| Molecular Weight | 825.97 |
| Exact Mass | 825.2518 |
| SMILES | CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=C(C=C5)NC6=CC=C(C=C6)OCC.[Na+] |
| InChIKey | NKLPQNGYXWVELD-UHFFFAOYSA-M |
| InChI | InChI=1S/C45H45N3O7S2.Na/c1-4-47(31-33-9-7-11-43(29-33)56(49,50)51)40-23-15-36(16-24-40)45(35-13-19-38(20-14-35)46-39-21-27-42(28-22-39)55-6-3)37-17-25-41(26-18-37)48(5-2)32-34-10-8-12-44(30-34)57(52,53)54;/h7-30H,4-6,31-32H2,1-3H3,(H2,49,50,51,52,53,54);/q;+1/p-1 |
| PubChem CID | 61365 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- 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
Documents
Safety Data Sheets (SDS)
Available in English, English (US), 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
- Acid Blue 83
- Acid Cyanine 6B
- Brilliant Blue R
- Brilliant Blue R250
- C.I. Acid Blue 83
- CBBR
- Coomassie blue R 250
- COOMASSIE BRILLIANT BLUE R
- Coomassie Brilliant Blue R-250
- Eriosin Brilliant Cyanine 6B
Frequently asked questions
What is Coomassie brilliant blue R-250 used for?
It is primarily used as a protein stain in SDS-PAGE and other electrophoresis techniques to visualize proteins in gels.
What is the chemical formula and molecular weight of Coomassie brilliant blue R-250?
The formula is C45H44N3NaO7S2 and the molecular weight is 825.97 g/mol.
How should Coomassie brilliant blue R-250 be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade of Coomassie brilliant blue R-250 is available?
Available in analytical grade for laboratory use.
Can Molekula supply Coomassie brilliant blue R-250 in bulk?
Yes, Molekula can supply Coomassie brilliant blue R-250 in bulk quantities—please contact sales for details.
What documentation comes with my order of Coomassie brilliant blue R-250?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
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.