Phenol red / phenol sulfonylphthalein
Item No.： SR0017
Store at： RT
English Name: phenol red; Phenolsulfonephthalein； 3,3-Bis(p-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide
Other names: phenol red; Phenol sulfonyl phthalide; Phenol sulfonphthalein; 3,3-bis (p-hydroxyphenyl) - 3h-2,1-benzooxythiopentane-1,1-dioxide; Phenolsulfonphthalein; Phenolphthalein red
CAS No.: 143-74-8
C19H14O5S=354.38
Grade: ind
PH discoloration range: 1.2 (Orange) ～ 3.0 (yellow); 6.5 (brown yellow) ～ 8.0 (purple red)
Burning residue: ≤ 0.2%
Alkali dissolution test: acceptable
Mass absorption coefficient ε 1（ λ 1,pH 1.2）/（L/cm?g）：110.0～123.0
Mass absorption coefficient ε 2（ λ 2,pH 3.0）/（L/cm?g）：60.0～68.0
Mass absorption coefficient ε 3（ λ 3,pH 6.5）/（L/cm?g）：62.0～72.0
Mass absorption coefficient ε 4（ λ 4,pH 8.0）/（L/cm?g）：120.0～135.0
Maximum absorption wavelength λ 1（pH 1.2）/（nm）：503～506
Maximum absorption wavelength λ 2（pH 3.0）/（nm）：430～435
Maximum absorption wavelength λ 3（pH 6.5）/（nm）：430～435
Maximum absorption wavelength λ 4（pH 8.0）/（nm）：557～560
Physicochemical properties: bright red to dark red crystal or fine crystalline powder, stable in air. About 350 ml of ethanol, and 500 ml of acetone. It is easy to dissolve in alkali hydroxide or alkali carbonate solution and is red. It is azeotropic with zinc powder to fade. It is almost insoluble in ether and chloroform. The maximum absorption wavelength is 557 (360) nm. Irritating
Purpose: biochemical research. Acid base indicator; Determination of total blood carbon dioxide. Indicator for preparation of bisaccharide iron urea medium in bacterial serum test
Saving: RT
