ALIZARIN RED S AR (pH Indicator) (C.I.NO.58005)

Sodium alizarine sulphonate

Article No A-00426
CAS No 130-22-3
HSN Code 38220090
Purity -
Grade AR
Molecular Formula C14H7NaO7S
Molecular Weight 342.3
Shelf Life 5 years




ALIZARIN RED S AR (pH Indicator) (C.I.NO.58005)

25 gm

ALIZARIN RED S AR (pH Indicator) (C.I.NO.58005)

100 gm


Appearance Red powder
Loss on drying (110°C) Max.5%
Initial Boiling Point 287°C
Melting Point 430 °C
Solubility In Water (% weight) Sparingly Soluble in Water
Dye content (By Spectrophotometry on dried substance) Min 70%
Transition range pH 4.3 - 6.3 Brilliant yellow to pink
Transition range pH 9.4 - 12.0 Brown orange to violet
Absorptivity (A1%/1cm at 556) Min 350.0
Absorptivity (A1%/1cm at 595) Min 325.0
Absorption maximum in 0.1N NaOH λmax1 553-559nm
Absorption maximum 0.1N NaOH λmax2 592-599nm