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1.05228

Supelco

m-Cresol purple

indicator

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Synonym(s):
m-Cresol purple, m-Cresolsulfonphthalein, 2′,2′′-Dimethylphenolsulfonphthalein, MCP
Empirical Formula (Hill Notation):
C21H18O5S
CAS Number:
Molecular Weight:
382.43
MDL number:
EC Index Number:
218-960-6

Quality Level

loss

≤1% loss on drying, 110°C

color

dark red to olive green

visual transition interval

1.2-2.8, pink to yellow(1st transition range)
7.4-9.0, brownish-yellow to violet(2nd transition range)

bulk density

480 kg/m3

storage temp.

2-30°C

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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1.030258.09691857890
m-Cresol purple indicator

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1.05228

m-Cresol purple

Bromocresol purple indicator ACS,Reag. Ph Eur

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m-Cresol for synthesis

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8.09691

m-Cresol

m-Cresol Purple indicator grade, Dye content 90 %

Sigma-Aldrich

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m-Cresol Purple

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

room temp

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

loss

≤1% loss on drying, 110°C

loss

≤1% loss on drying, 110°C

loss

-

loss

-

visual transition interval

1.2-2.8, pink to yellow(1st transition range)

visual transition interval

5.2-6.8, greenish yellow to blue-violet

visual transition interval

-

visual transition interval

-

bulk density

480 kg/m3

bulk density

515 kg/m3

bulk density

-

bulk density

-

Analysis Note

Appearance (color): dark red to olive green
1st transition range: pH 1.2 - pH 2.8pink - yellow
2nd transition range: pH 7.4 - pH 9.0brownish yellow - violet
Appearance of solution: conforms
Loss on drying (110 °C): ≤ 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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