Appearance
|
Orange colored powder
|
pH 5.5- 6.8
|
Yellow to reddish-violet
|
Absorption maxima in NaOH 0.01 mol/L (λmax1)
|
564 - 568 nm
|
Absorption maxima in NaOH 0.01 mol/L (λmax2)
|
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
|