Phenol Red

Product name:Phenol Red
CAS No. 143-74-8
MF:  C₁₉H₁₄O₅S
MW: 354.38
PH indicator range:
1.2 (orange) -3.0(yellow)
6.5(yellow-brown)- 8.0(purple)
Maximum absorption wave-length(nm):
λ₁(PH1.2)  503---506
λ₂(PH 3.0)  430---435
λ₃(PH 6.5)  430---435
λ₄(PH 8.0)  557---560
Mass absorption coefficient(L/cm·g)
α₁ (λ₁,PH 1.2,dry sample)110---123
α₂ (λ₂,PH 3.0,dry sample)60---68
α₃ (λ₃,PH 6.5,dry sample)62---72
α₄ (λ₄,PH 8.0,dry sample)115-130
Solution test in alkali: qualified
Loss on drying: 1.0%max
Residue on ignition (as sulfate): 0.2%max

Package: 25kg/fibre drum