Title: Thymol Blue
CAS Registry Number: 76-61-9
CAS Name: 4,4ยข-(3H-2,1-Benzoxathiol-3-ylidene)bis[5-methyl-2-(1-methylethyl)phenol] S,S-dioxide
Additional Names: a-hydroxy-a,a-bis(5-hydroxycarvacryl)-o-toluenesulfonic acid g-sultone; thymolsulfonephthalein
Molecular Formula: C27H30O5S
Molecular Weight: 466.59
Percent Composition: C 69.50%, H 6.48%, O 17.15%, S 6.87%
Properties: Brownish-green, cryst powder; characteristic odor. Insol in water. Sol in alcohol, dil alkali solns.
Use: As as acid-base indicator; pH: red 1.2 to yellow 2.8; also yellow 8.0 to blue 9.6. |