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1.03024

Supelco

Chlorophenol red

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Synonym(s):
Chlorophenol red, 3,3′′-Dichlorophenolsulfonphthalein
Empirical Formula (Hill Notation):
C19H12Cl2O5S
CAS Number:
Molecular Weight:
423.27
MDL number:
UNSPSC Code:
12352106
EC Index Number:
224-619-2

Quality Level

form

solid

loss

≤15% loss on drying, 110°C

visual transition interval

4.8-6.4, brownish-yellow to red-violet

mp

261 °C

bulk density

720 kg/m3

Amax

432-436 nm (buffer pH 4.8)
574-576 nm (buffer pH 6.4)

storage temp.

2-30°C

InChI

1S/C19H12Cl2O5S/c20-14-9-11(5-7-16(14)22)19(12-6-8-17(23)15(21)10-12)13-3-1-2-4-18(13)27(24,25)26-19/h1-10,22-23H

InChI key

WWAABJGNHFGXSJ-UHFFFAOYSA-N

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Transition range: pH 4.8 - pH 6.4 brownish-yellow - red-violet
Absorption maximum λ 1 (buffer pH 4.8): 432 - 436 nm
Absorption maximum λ 2 (buffer pH 6.4): 574 - 576 nm
Spec. Absorptivity A 1%/1cm (λ1max; 0.01g/l; buffer pH 4.8; calculated on dried substance): 450 - 600
Spec. Absorptivity A 1%/1cm (λ2max; 0.01g/l; buffer pH 6.4; calculated on dried substance): 1000 - 1300
Loss on drying (110 °C): ≤ 15 %

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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