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857890

Sigma-Aldrich

m-Cresol Purple

indicator grade, Dye content 90 %

Synonym(s):

m-Cresolsulfonphthalein

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About This Item

Empirical Formula (Hill Notation):
C21H18O5S
CAS Number:
2303-01-7
Molecular Weight:
382.43
Beilstein/REAXYS Number:
350314
EC Number:
218-960-6
MDL number:
MFCD00005871
UNSPSC Code:
12171500
PubChem Substance ID:
24888455
NACRES:
NA.47

grade

indicator grade

Quality Level

200

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)

ε (extinction coefficient)

≥ 11000 at 295-301 nm at 0.01 g/L (0.01 G/L in 0.005 N NAOH in Methanol)
≥26000 at 578-584 nm at 0.01 g/L (in 0.005 N NAOH in Methanol)
≥8000 at 369-375 nm at 0.01 g/L (in 0.005 N NAOH in Methanol)

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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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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Certificates of Analysis (COA)

Lot/Batch Number
0000347002
0000362107
0000362106
0000362107
0000362106

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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)
Relative sensitivity of five Hawaiian coral species to high temperature under high-pCO2 conditions.
Bahr KD, et al.
Coral Reefs, 35, 729-738 (2016)
A Noto et al.
Clinical chemistry, 29(10), 1713-1716 (1983-10-01)
We have developed a new spectrophotometric assay for urinary N-acetyl-beta-D-glucosaminidase (NAGase) with use of sodio m-cresolsulfonphthaleinyl N-acetyl-beta-D-glucosaminide (MCP-NAG). MCP-NAG was synthesized from acetochloro-glucosamine and m-cresolsulfonphthalein (MCP) in four steps. MCP-NAG reacts well with NAGase (Km = 0.41 mmol/L) and is
E Watanabe et al.
Biological & pharmaceutical bulletin, 23(7), 838-843 (2000-08-05)
Apparent membrane permeation coefficients (Papp) of poorly water-soluble drugs such as indomethacin (IDM) and triamterene (TAT) were obtained by the chamber method using an isolated rat intestinal tissue after solubilization of the drugs by additives. For the additives, sodium deoxycholate
J P Richards et al.
Pharmaceutical research, 15(9), 1434-1441 (1998-10-02)
The purpose of the current study was to investigate the effects of two important excipients, zinc and m-cresol, on the self-association properties of a series of monomeric insulin analogs. In this way, the effects on formulation behavior of individual amino
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