|
Appearance
|
Orange colored powder
|
|
pH 5.5- 6.8
|
Yellow to reddish-violet
|
|
Absorption maxima (λmax1) c= 0.01 g/L ; 0.1 NaOH
|
564 - 568 nm
|
|
Absorption maxima (λmax2) c= 0.01 g/L ; 0.1 NaOH
|
605 - 609 nm
|
|
Absorptivity (A 1%/1cm; at λmax2)
|
Min 525
|
|
Sulphated ash
|
Max 1%
|
|
Loss on drying
|
Max 5%
|
|
Absorptivity (A 1%/1cm; at λmax1)
|
Min 625
|