Phenol Red,sodium salt, Phenolsulfonephthalein sodium salt, Phenol Red SodiuM Salt, PR sodium salt, phenolsulfonphthalein sodium salt, phenolsulfonephthalein sodium, Sodium 4-(3-(4-hydroxyphenyl)-1,1-dioxido-3H-benzo[c][1,2]oxathiol-3-yl)phenolate, phenolsulphophthaleine sodium salt, PHENOL RED,ACS, Sodium Phenol Red, Phenolsulfonephthalein sodium, Phenolsulfonephthalein sodium salt, Water soluble pH indicator; Phenolsulphonephthalein sodiumsa, Phenolsulfonephthalein sodium salt, Phenolsulfonephthalein sodium salt