| cresol r. |
an indicator, ortho-cresol-sulfonphthalein, used in the determination of the hydrogen ion concentration. It has a pH range of 7.2 to 8.8, being yellow at 7.2 and red at 8.8.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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