|
Appearance
|
Green to black powder or crystalline powder
|
|
Identity (IR)
|
Passes test
|
|
Solubility (0.1% in ethanol)
|
Clear dark red to purple
|
|
Absorption maxima (λmax1 in ethanol)
|
527 - 533 nm
|
|
Extinction coefficient at λmax1
|
Min 58000
|
|
Absorption maxima (λmax2 in ethanol)
|
325 - 331 nm
|
|
Extinction coefficient at λmax2
|
Min 10000
|
|
Absorption maxima (λmax3 in ethanol)
|
279 - 285 nm
|
|
Extinction coefficient at λmax3
|
Min 8800
|
|
Dye content
|
Min 95.0%
|