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114480

Sigma-Aldrich

Cresol Red sodium salt

indicator grade

Empirical Formula (Hill Notation):
C21H17NaO5S
CAS Number:
Molecular Weight:
404.41
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

Quality Level

grade

indicator grade

form

solid

mp

250 °C (dec.) (lit.)

solubility

H2O: 1 mg/mL

λmax

425 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].Cc1cc(ccc1O)\C(=C2/C=CC(=O)C(C)=C2)c3ccccc3S([O-])(=O)=O

InChI

1S/C21H18O5S.Na/c1-13-11-15(7-9-18(13)22)21(16-8-10-19(23)14(2)12-16)17-5-3-4-6-20(17)27(24,25)26;/h3-12,22H,1-2H3,(H,24,25,26);/q;+1/p-1/b21-16-;

InChI key

GBXGEGUVARLBPB-PLMZOXRSSA-M

Related Categories

Application

Cresol Red has been used for checking the immobilized carbonic anhydrase-catalyzed reactions. It has also been used in the loading buffer for MHC (major histocompatibility complex) class I typing through PCR.

Packaging

5, 25 g in glass bottle

Biochem/physiol Actions

Cresol Red is used as a pH indicator.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Certificate of Origin

Paula C A Jerónimo et al.
The Analyst, 130(8), 1190-1197 (2005-07-16)
An optical biosensor based on immobilised carbonic anhydrase and its application to the determination of the anti-glaucoma agent acetazolamide by enzyme inhibition measurements, is described. The enzyme and a pH indicator dye, cresol red, were physically immobilised in overlapped sol-gel
[Fundamental studies on the measurement of urinary NAG and determination of the normal values for NAG activity in various age groups].
Y Iimura et al.
Rinsho byori. The Japanese journal of clinical pathology, 31(2), 179-184 (1983-02-01)
An internal indicator for alkaline denaturation of double-stranded DNA in dideoxy sequencing reactions.
B H Taylor et al.
BioTechniques, 14(4), 560-560 (1993-04-01)
M Swati et al.
Analytica chimica acta, 676(1-2), 68-74 (2010-08-31)
An optical biosensing scheme based on urease encapsulated calcium alginate microspheres which are coated with polyelectrolyte nanofilms predominantly composed of cresol red (CR) dye is demonstrated in this paper. The dye molecules within the nanofilms are deposited via the layer-by-layer
Berthold Borucki et al.
Biochemistry, 41(31), 10026-10037 (2002-07-31)
We studied the kinetics of proton uptake and release by photoactive yellow protein (PYP) from Ectothiorhodospira halophila in wild type and the E46Q and E46A mutants by transient absorption spectroscopy with the pH-indicator dyes bromocresol purple or cresol red in

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