1.03024
Chlorophenol red
pH indicator
Synonym(s):
3,3′′-Dichlorophenolsulfonphthalein, Chlorophenol red
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About This Item
Product Name
Chlorophenol red, indicator
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
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 %
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signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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