Thymol blue / thymol sulfonphthalein

English Name: thymol blue; 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis[5-methyl-2-(1-methylethyl)phenol] S,S-dioxide

Other names: thymol blue; Thymol blue; Thymol blue; Thymol sulfonphthalein; Thymol blue; 4,4 '- (3h-2,1-benzoxathiol-3-subunit) bis [5-methyl-2 - (1-methylethyl) phenol] - s, S-dioxide; Daphne odora

CAS No.: 76-61-9

C27H30O5S=466.59

Grade: ind

PH discoloration range: 1.2 (red) ～ 2.8 (yellow); 8.0 (yellow) ～ 9.6 (blue)

Ethanol dissolution test: acceptable

Mass absorption coefficient ε/ （L/cm•g）：≥71.0

Burning residue: ≤ 0.3%

Physicochemical properties: brownish brown green crystalline powder. It smells strange. It is yellow in ethanol, blue in dilute alkaline solution and insoluble in water. Melting point: 221-224 ℃ (decomposition). The maximum absorption wavelength is 594 (376) nm. Its ammonium salt is soluble in water, and the aqueous solution is light brown yellow, which is called water-soluble thymol blue. Its sodium salt is brown powder, soluble in water

Purpose: biochemical research. Acid base indicator; Adsorption indicator

Saving: RT