Skip to Content
Merck
All Photos(2)

Key Documents

C8679

Sigma-Aldrich

Chicago Sky Blue 6B

powder

Synonym(s):

Direct Blue 1, Pontamine sky blue

Sign Into View Organizational & Contract Pricing


About This Item

Empirical Formula (Hill Notation):
C34H24N6Na4O16S4
CAS Number:
Molecular Weight:
992.80
Colour Index Number:
24410
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47

form

powder

Quality Level

composition

Dye content, ~80%

color

blue

solubility

H2O: 10 mg/mL

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].[Na+].[Na+].COc1cc(ccc1\N=N\c2ccc3c(cc(c(N)c3c2O)S([O-])(=O)=O)S([O-])(=O)=O)-c4ccc(\N=N\c5ccc6c(cc(c(N)c6c5O)S([O-])(=O)=O)S([O-])(=O)=O)c(OC)c4

InChI

1S/C34H28N6O16S4.4Na/c1-55-23-11-15(3-7-19(23)37-39-21-9-5-17-25(57(43,44)45)13-27(59(49,50)51)31(35)29(17)33(21)41)16-4-8-20(24(12-16)56-2)38-40-22-10-6-18-26(58(46,47)48)14-28(60(52,53)54)32(36)30(18)34(22)42;;;;/h3-14,41-42H,35-36H2,1-2H3,(H,43,44,45)(H,46,47,48)(H,49,50,51)(H,52,53,54);;;;/q;4*+1/p-4/b39-37+,40-38+;;;;

InChI key

BPHHNXJPFPEJOF-GPTZEZBUSA-J

Looking for similar products? Visit Product Comparison Guide

Application

Chicago Sky Blue 6B is a counterstain for background autofluorescence in fluorescence and immunofluorescence histochemistry. It has also been used as a filling in glass pipette electrodes for electrophysiological recordings in the brain sections of rats.

Biochem/physiol Actions

Chicago Sky Blue 6B is a large organic acid, structurally related to glutamate, that is a potent and efficient competitive inhibitor of vesicular glutamate uptake.

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Carc. 1B

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

T Cowen et al.
Histochemistry, 82(3), 205-208 (1985-01-01)
The stain pontamine sky blue (PSB) has been shown to reduce background autofluorescence in catecholamine fluorescence and immunofluorescence histochemical preparations. Using PSB as a counterstain on whole-mount stretch preparations of human mesenteric blood vessels, a medium dense noradrenergic nerve plexus
Resonant antidromic cortical circuit activation as a consequence of high-frequency subthalamic deep-brain stimulation.
Li S, et al.
Journal of Neurophysiology, 98, 3525-3525 (2007)
Detection of aromatase in human endometrial tissue cultured in three-dimensional fibrin matrix in vitro.
Jafar A, et al.
International journal of reproductive biomedicine (Yazd, Iran), 7, 105-109 (2009)
Responses to tactile stimulation in deep cerebellar nucleus neurons result from recurrent activation in multiple pathways.
Rowland NC and Jaeger D
Journal of Neurophysiology, 99, 704-704 (2008)
Li Hang Qi et al.
Human gene therapy, 20(7), 739-750 (2009-03-13)
Because both Toll-like receptor-1 (TLR1) and TLR2 are expressed in atherosclerotic plaques, we hypothesized that TLR1 and TLR2 may play different roles in the formation of vulnerable plaques and that combinatorial knockdown of TLR1 and TLR2 genes may enhance the

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service