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05-6580

Sigma-Aldrich

Cresol red

JIS special grade

Synonym(s):

o-Cresolsulfonphthalein

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About This Item

Empirical Formula (Hill Notation):
C21H18O5S
CAS Number:
1733-12-6
Molecular Weight:
382.43
Beilstein:
343399
EC Number:
217-064-2
MDL number:
MFCD00005878
UNSPSC Code:
12171502
PubChem Substance ID:
329748140

grade

JIS special grade

availability

available only in Japan

pH

7.2-8.8, yellow to red

SMILES string

Cc1cc(ccc1O)C2(OS(=O)(=O)c3ccccc23)c4ccc(O)c(C)c4

InChI

1S/C21H18O5S/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)26-21/h3-12,22-23H,1-2H3

InChI key

OBRMNDMBJQTZHV-UHFFFAOYSA-N

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Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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K Elamrani et al.
Biochimica et biophysica acta, 727(1), 22-30 (1983-01-05)
The kinetics of H+/OH- diffusion across dimyristoyl phosphatidic acid bilayer membranes was measured by following the absorbance of the pH-sensitive indicator Cresol red (o-cresolsulfonphthalein) entrapped in single lamellar vesicles after rapidly changing the external pH in a stopped-flow apparatus. The
K Schilling et al.
Clinical chemistry, 39(2), 251-256 (1993-02-01)
If buffer/indicator systems are used as optical thermometers in multicuvettes, the temperature resolution is limited by errors of optical measurements produced mainly by variations of pathlength and blank transmittance of the wells. Theoretical and practical approaches show that, in multicuvettes
H N Nigg et al.
Journal of economic entomology, 97(6), 1850-1860 (2005-01-26)
We needed a technique to compare the consumption of baits by individual Carribbean fruit fly, Anastrepha suspensa (Loew). By improving consumption and determining individual dose, we could lower pesticide concentration while retaining bait/pesticide efficacy and potentially reduce the environmental impact
K Horie et al.
Analytical biochemistry, 137(1), 80-87 (1984-02-01)
A highly sensitive quantitative method was developed to detect protons released or taken up upon ligand binding. A small change in pH due to proton release or uptake was detected by measuring the difference in the absorbance of a pH
F Ahmadi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 67(2), 412-419 (2006-09-09)
The effects of cationic cetyltrimethylammonium bromide (CTAB), hexadecylpyridinum chloride (HDPC) and anionic sodium dodecylsulphate (SDS) surfactants on dissociation constants and transition intervals of methyl red, methyl orange and cresol red were studied spectrophotometrically. The results show that all studied indicators
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