Chlorophenol red

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Chlorophenol red
Common name Chlorophenol red
Systematic name 3'-3'-Dichlorophenolsulfonaphtalein
Other names
Chemical formula C19H12Cl2O5S
FW 423.27
mp
Sigma-Aldrich 4430-20-0
price $7.70 for 1g

Indicator dye

pH range 4.8 to 6.7, yellow to violet

lamda_max = 572 nm