Phenol Red
CAS:143-74-8 Product spec:qualified
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...
Eriochrome Black T
CAS:1787-61-7 Product spec:qualified
MF: C20H12N3NaO7S
MW: 416.38
Water soluble test:qualified
Ethanol soluble test: qualified
Sensitive test: qualified
Residue on ignition(as sulfate): 20%max
Fluorescein
CAS:2321-07-5 Product spec:qualified
MF: C20H12O5
MW: 332.31
Maximum absorption wave-length λ(PH8.0):490-493 nm
Mass-absorption coefficient λ(PH8.0)Lcm•g: 200 min.
Ethanol soluble test: qualified
Sensitive test: qualified
Loss on ..
Fluorescein disodium salt
CAS:518-47-8 Product spec:qualified
Molecular formula: C20H10Na2O5
Molecular weight: 376.28
Appearance: salmon pink powder
Water soluble test: qualified
Bromine sensitivity test: qualified
Water: 7.0%max
Pigment Blue 61
CAS:1324-76-1 Product spec:qualified
MF: C37H29N3O3S
PH indicator range: 9.4(blue)-14.0(pink)
Methanol soluble test: qualified
Methylene blue
CAS:61-73-4 Product spec:98.0%min
MF:C16H18ClN3S•3H2O
MW: 373.9
Methylene blue(C16H18ClN3S):98.0%min
Indicator range: qualified
Loss on drying:15.0%max
Residue on ignition (as sulfate): 0.5%max
As: 0.0005%max
Zn: 0.02%max
Cu:..
Methyl red
CAS:493-52-7 Product spec:qualified
Molecular formula: C15H15O2N3
Molecular weight: 269.30
PH indicator range: 4.5(red)~6.2(yellow)
Residue on ignition (as sulfate): 0.2%max
Mass-absorption coefficient λ1(PH4.5),L(cm•g): 130min
..
Methyl Violet
CAS:603-47-4 Product spec:qualified
MF: C24H27N3.HCl
PH indicator range: 0.15(yellow)-3.2(purple)
Methanol-soluble test: qualified
Residue on ignition(as sulfate):1.0%max
Loss on drying:7.5% max
Methyl orange
CAS:547-58-0 Product spec:qualified
Molecular Formula: C14H14N3NaO3S
Molecular Weight: 327.33
Water-soluble test: qualified
Sensitive test: qualified
PH Color Change Range: 3.0(orange)-4.4(yellow)
Residue on ignition(as sulfate): ..