|
Appearance
|
Brownish black powder
|
|
Suitability (as metal indicator)
|
Passes test
|
|
Absorption maxima at pH 10
|
605 - 625 nm
|
|
Clarity of solution
|
Passes test
|
|
Specific absorptivity A1%/1cm (λmax; 0.02 g/L; buffer pH 10.0; calculated on dried substance)
|
Min 300.0
|
|
Loss on drying (at 110°C)
|
Max 7.0%
|