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857890

Sigma-Aldrich

m-Cresol Purple

indicator grade, Dye content 90 %

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Synonym(s):
m-Cresolsulfonphthalein
Empirical Formula (Hill Notation):
C21H18O5S
CAS Number:
Molecular Weight:
382.43
Beilstein/REAXYS Number:
350314
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

grade

indicator grade

Quality Level

form

powder

composition

Dye content, 90%

technique(s)

titration: suitable

useful pH range

1.2-2.8, red to yellow(acid)
7.4-9.0, yellow to violet(alkaline)

λmax

371 nm (2nd)
579 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Cc1cc(O)ccc1\C(=C2/C=CC(=O)C=C2C)c3ccccc3S(O)(=O)=O

InChI

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

Inchi Key

OLQIKGSZDTXODA-UHFFFAOYSA-N

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1 of 4

This Item
114375860891211761
vibrant-m

857890

m-Cresol Purple

vibrant-m

114375

Bromocresol Purple

vibrant-m

860891

Bromocresol Purple sodium salt

vibrant-m

211761

m-Cresol Purple sodium salt

grade

indicator grade

grade

-

grade

indicator grade

grade

-

form

powder

form

powder

form

powder

form

powder

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

λmax

371 nm (2nd), 579 nm

λmax

419 nm

λmax

379 nm, 585 nm (2nd)

λmax

579 nm

General description

m-Cresol Purple (meta Cresol Purple) is a sulfonephthalein dye. It is also known as m-Cresolsulfonphthalein.

application

m-Cresol purple has been used to measure pH via spectrophotometer.

Biochem/physiol Actions

m-Cresol purple is a pH indicator. It changes from red (pH 1.2) to yellow (2.8) and yellow (7.4) to purple (9.0).

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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Relative sensitivity of five Hawaiian coral species to high temperature under high-pCO2 conditions.
Bahr KD, et al.
Coral Reefs, 35, 729-738 (2016)
Seasonal and annual calcification rates of the Hawaiian reef coral, Montipora capitata, under present and future climate change scenarios.
Bahr KD, et al.
ICES Journal of Marine Science, fsw078-fsw078 (2016)
Ali A Ensafi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 60(8-9), 2053-2057 (2004-07-14)
A new flow-injection method is reported for the determination of bromide. The method is based on catalytic effect of bromide on the oxidation of m-cresolsulfonephthalein by periodate in acidic media. The reaction was followed spectrophotometrically by measuring the decrease in
M D Johnston et al.
Journal of applied microbiology, 94(6), 1015-1023 (2003-05-20)
To examine the effect on the leakage of low molecular weight cytoplasmic constituents from Staphylococcus aureus using phenolics singly and in combination, and to see if the observations could be modelled using a non-linear dose response. The rate of potassium
Keisha D Bahr et al.
PloS one, 15(2), e0228168-e0228168 (2020-02-06)
Ocean warming and acidification are among the greatest threats to coral reefs. Massive coral bleaching events are becoming increasingly common and are predicted to be more severe and frequent in the near future, putting corals reefs in danger of ecological

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