Bromophenol blue / tetrabromophenol sulfonphthalein / BPb

English Name: BPb; Bromophenol blue； 3',3'',5',5''-Tetrabromophenolsulfonephthalein

Other names: bromophenol blue; Tetrabromophenol sulfonphthalein; Tetrabromophenol sulfonphenolphthalein; Tetrabromophenol sulfonphthalein; Tetrabromophenol sulfonyl phthalide; 3,3 ', 5,5' - tetrabromosulfonphenolphthalein

CAS No.: 115-39-9

C19H10Br4O5S=669.97

Grade: ind

PH discoloration range: 3.0 (yellow) ～ 4.6 (blue violet)

Ethanol dissolution test: acceptable

Mass absorption coefficient ε/ （L/cm•g）：≥115.0

Burning residue: ≤ 0.25%

Physicochemical properties: light yellow to brownish yellow powder. It is easily soluble in sodium hydroxide solution, soluble in methanol, ethanol and benzene, and slightly soluble in water (about 0.4g/100ml). Melting point 279 ℃ (decomposition), maximum absorption wavelength 422nm

Purpose: biochemical research. Acid base indicator; Adsorption indicator

Saving: RT