英文别名:phenol,4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis[2,5-dimethyl-,s,s-dioxide;1,4-DIMETHYL-5-HYDROXYBENZENESULFONPHTHALEIN;4,4-(3H-2,1-benzoxathiol-3-ylidene)bis(2,5-dimethylphenol) S,S-dioxide;p-Xylenolsulphonephthalein;XYLENOL BLUE, INDICATOR GRADE;XYLENOL BLUE FREE ACID;P-XYLENOL BLUE INDICATOR;P-XYLENOL BLUE (0.04% IN CA. 95% ETHANOL) [FOR PH DETERMINATION]