13-2260
NN
CP
Synonym(s):
Calconcarboxylic acid, Cal-Red™, 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic acid, 3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2-carboxylic acid, Patton and Reeder’s reagent
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About This Item
Empirical Formula (Hill Notation):
C21H14N2O7S
CAS Number:
Molecular Weight:
438.41
PubChem Substance ID:
UNSPSC Code:
12171500
Beilstein/REAXYS Number:
727492
MDL number:
Grade:
CP
grade
CP
form
powder
availability
available only in Japan
concentration
~0.5%
dilution
(for analytical testing)
SMILES string
OC(=O)c1cc2ccccc2c(N=Nc3c(O)cc(c4ccccc34)S(O)(=O)=O)c1O
InChI
1S/C21H14N2O7S/c24-16-10-17(31(28,29)30)13-7-3-4-8-14(13)18(16)22-23-19-12-6-2-1-5-11(12)9-15(20(19)25)21(26)27/h1-10,24-25H,(H,26,27)(H,28,29,30)/b23-22-
InChI key
MVQBFZXBLLMXGS-FCQUAONHSA-N
Other Notes
1:200 diluted with potassium sulfate
Legal Information
Cal-Red is a trademark of Sigma-Aldrich Co. LLC
Storage Class
13 - Non Combustible Solids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
Regulatory Information
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Li-Tai Jin et al.
Electrophoresis, 25(15), 2494-2500 (2004-08-10)
A highly sensitive silver staining method for detecting proteins in sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was developed. It is based on the silver nitrate staining method but also employs an azo dye, calconcarboxylic acid (NN), as a silver-ion sensitizer.
D W Jung et al.
Electrophoresis, 19(14), 2412-2415 (1998-11-20)
We have developed a new mixed-dye protein staining method that is simple, rapid, and sensitive. A freshly prepared mixture of calconcarboxylic acid (NN, 0.02%) and rhodamine B (RB, 0.04%) in 40% methanol/7% acetic acid, was used as a staining solution.
Y Su et al.
The journal of physical chemistry. B, 117(6), 1563-1570 (2012-06-06)
The electrophoretic deposition (EPD) method has been developed for the fabrication of MnO(2)-multiwalled carbon nanotube (MWCNT) films for application in electrochemical supercapacitors (ESs). For MWCNT applications, which depend on electrical conductivity, it is challenging to achieve dispersion and EPD of