Phenolphthalien
CAS:77-9-8 Product spec:qualified
Molecular formula: C20H14O4
Molecular weight: 318.33
PH indicator range: 8.0(colorless)--- 10.0(red purple)
Residue on ignition (as sulfate): 0.05%max
Mass-absorption coefficient (Lcm•g): 68.0---..
o-Cresolphthalein
CAS:596-27-0 Product spec:qualified
Molecular formula: C22H18C4
Molecular weight: 346.38
PH indicator range: 8.2(Colorless)-- 9.8(Red)
Basic Violet 3
CAS:548-62-9 Product spec:qualified
MF: C25H30ClN3
MW: 318.33
Light absorption test: qualified
Non-aqueous solution titration test: qualified
Methanol soluble test: qualified
Residue on ignition(as sulfate): 0.5%max
Loss on drying..
Pyrocatechol Violet
CAS:115-41-3 Product spec:qualified
MF: C19H14O7S
MW: 386.38
Bismuth (Bi) sensitivity test: qualified
Sensitivity test to acid and alkali: qualified
Water soluble test: qualified
Residue on ignition(as sulfate): 0.4%max
Direct Red 28
CAS:573-58-0 Product spec:qualified
MF: C32H22N6Na2O6S2
MW: 696.68
PH indicator range: 3.0(bluish violet)-5.2(red)
Water-insoluble test : qualified
Moisture: 5.0%max
Residue on ignition: 27%max
Acid Violet 19
CAS:3244-88-0 Product spec:qualified
MF: C20H17N3Na2O9S3
MW: 3585.53
Biological staining test:qualified
Acid Red 87
CAS:17372-87-1 Product spec:qualified
MF:C20H6Br4Na2O5
Cresol Red
CAS:1733-12-6 Product spec:qualified
MF: C21H18O5S