Code: km-306
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