Coomassie brilliant blue

Coomassie brilliant blue G-250
Solid Coomassie brilliant blue G	Brilliant blue G in isopropanol solution
Names
	Other names C.I. 42655, C.I. Acid Blue 90; Brilliant indocyanine G, Brillantindocyanin G; Xylene Brilliant Cyanine G, Serva Blue G
Identifiers
CAS Number	6104-58-1;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.025.509
KEGG	D10799 ;
PubChem CID	6324599;
CompTox Dashboard (EPA)	DTXSID80910613 ;
	SMILES CCN(CC1=CC(=CC=C1)S(=O)(=O)O)C2=CC(=C(C=C2)/C(=C\3/C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)O)C=C3C)/C5=CC=C(C=C5)NC6=CC=C(C=C6)OCC)C;
Properties
Chemical formula	C47H50N3NaO7S2 (Sodium salt)
Molar mass	856.03 g/mol
Solubility in water	Slightly soluble in cold, soluble in hot (bright blue)
Solubility in ethanol	Soluble
Pharmacology
Legal status	CA: ℞-only;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Coomassie Brilliant Blue R-250
Names
	Other names C.I. 42660, C.I. Acid Blue 83; Brilliant indocyanine 6B, Brillantindocyanin 6B; Brilliant Cyanine 6B, Serva Blue R
Identifiers
CAS Number	6104-59-2 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL4279842;
ChemSpider	acid: 21172997;
ECHA InfoCard	100.025.509
EC Number	228-060-5;
PubChem CID	61365;
UNII	TKL1K0PT9A ;
CompTox Dashboard (EPA)	DTXSID80910613 ;
	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 Key: NKLPQNGYXWVELD-UHFFFAOYSA-M;
	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+];
Properties
Chemical formula	C45H44N3NaO7S2 (Sodium salt)
Molar mass	825.97 g/mol
Solubility in water	Insoluble in cold, slightly soluble in hot (bright red blue)
Solubility in ethanol	Slightly soluble
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Coomassie brilliant blue is the name of two similar triphenylmethane dyes that were developed for use in the textile industry but are now commonly used for staining proteins in analytical biochemistry. Coomassie brilliant blue G-250 differs from Coomassie brilliant blue R-250 by the addition of two methyl groups. The name "Coomassie" is a registered trademark of Imperial Chemical Industries.