Solubility 0.1% (dist. water)..................................................................................Clear Red Solution
Absorptivity 1% 1cm,
(pH6.5) at λ max.430.0 nm....................................................................................560-620
(pH8.2) at λ max.558.0 nm....................................................................................970-1100
Loss on drying at 110°C (1hr) ..............................................................................< 5%
