|
Appearance
|
Yellow to Tan Coloured Powder
|
|
Dye content (by spectrophotometry)
|
Min 95%
|
|
Identity (IR)
|
Passes test
|
|
pH 3.8-5.4
|
Yellow to blue
|
|
Appearance of solution
|
Conforms
|
|
Absorption maxima (0.003% Methanol)
|
418 – 428 nm
|
|
Molar Absorptivity at lambda max
|
Min 17000
|
|
Loss on drying (at 110°C)
|
Max 3%
|
|
Transition range (according to ACS)
|
Passes test
|
|
Sensitivity
|
Passes test
|