Dye content (Titanometry).....................................................................................> 60.0%
Absorption maximum (in 0.005M HCl).................................................................595 - 605 nm
Absorption Ratio [(A λ max - 15 nm) / (A λ max + 15 nm)].................................0.96 - 1.09
Absoptivity (A1%/1 cm at ë max. 0.005M HCl).....................................................675 - 1125
Suitability for microscopy..........................................................................................To pass the test.
