Product name: Cresol Red
No.:A027
CAS No.: 1733-12-6
M F: C21H18O5S
Property: Reddish brown powder, soluble in alkali solution, slightly soluble in methyl alcohol and ethyl alcohol, poorly soluble in acetone and benzene, insoluble in ether.
Molecular weight: 382.44
Use: Acid-base indicator
Technical index |
Item: | Technical grade |
PH color change range | 6.5(yellow)-8.5(purple) |
Maximum absorption wavelength/ (nm) |
λ1(PH6.5) 432-436
λ2(PH8.5) 571-574
|
Mass-absorption coefficient(L/cm?g) |
α1[λ1(PH6.5)] 49-67
α2[λ2(PH8.5)] 100-132
|
Soluble test in water | Qualified |
Ignition residue% | ≤1.0 |
Drying loss% | ≤0.2 |