Product name: Phenol Red
No.:A026
CAS No.: 143-74-8
M F: C19H14O5S
Property: Red or dark red crystalline powder, easily soluble in ethyl alcohol and acetone, insoluble in water.
Molecular weight: 354.38
Use: Acid-base indicator, etc.
Technical index |
Item: | Technical grade |
PH color change range | 1.2(orange)-3(yellow) 6.5(yellow)-8(purple) |
Maximum absorption wavelength |
λ1 (PH1.2) 503-506 λ2(PH3.0) 430-435
λ3 (PH6.5) 430-435 λ4(PH8.0) 557-560
|
Mass-absorption coefficient | α1[λ1(PH1.2，dry sample)] 110-123 α2[λ2(PH3.0，dry sample)] 60-68 α3[λ3(PH6.5，dry sample)] 62-72 α4[λ4(PH8.0 dry sample)] 120-135 |
Soluble test in aqueous alkali | Qualified |
Ignition residue% | ≤0.2 |
Drying loss% | ≤1.0 |