Chemical Name |
Phenol Red |
CAS No. |
143-74-8 |
Molecular formula |
C19H14O5S |
EINECS No. |
205-609-7 |
Molecular weight |
354.38 |
Molecular Structure |
|
Details |
Appearance: Tender red or carmine crystal powder. PH change range: 1.2(orange)~3(yellow); 6.5(yellow)~8(viole) Maximal absorption wavelength(nm): λ1(PH1.2) 503-506 λ2 (PH3.0) 430-435 λ3 (PH6.5) 430-435 λ4 (PH8.0) 557-560 Quality absorption coefficient(L/cm·g): 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 Solubility in alkali: Passes test Loss on drying: 1.0% max Sulfated ash: 0.2% max Solubility:easy solve in alkali solution,alcohol&acetone, not solve in water. Packing: 25kg/ fibre drum. |
Main Application |
Acid and alkali indicator. |