Chlorophenol red
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| General | ||||||||||||||||
| Surname | Chlorophenol red | |||||||||||||||
| other names |
3 ', 3' '- dichlorophenolsulfonphthalein |
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| Molecular formula | C 19 H 12 Cl 2 O 5 S | |||||||||||||||
| Brief description |
dark red to brown solid |
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| properties | ||||||||||||||||
| Molar mass | 423.27 g mol −1 | |||||||||||||||
| Physical state |
firmly |
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| Melting point |
261 ° C |
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| solubility |
almost insoluble in water |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||||||||
Chlorophenol red is a chemical compound from the group of triphenylmethane dyes and is related to phenolphthalein . It is used as an indicator substance that changes its color from yellow to purple in the pH range from 4.8 to 6.4. At a pH of 4.8 the absorption range is 432–436 nm, at 6.4 it is 574–578 nm.
Individual evidence
- ↑ a b c data sheet chlorophenol red at Acros, accessed on February 19, 2010.
- ↑ a b Data sheet Chlorophenol Red from Sigma-Aldrich , accessed on March 22, 2011 ( PDF ).
- ↑ Data sheet at NILE CHEMICALS . .
Web links
Commons : Chlorophenol Red - Collection of images, videos, and audio files
