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Appearance
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Orange red brown or maroon powder
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|
Assay (by HPLC)
|
Min 95%
|
|
Solubility (in 1N NaOH)
|
50 mg/ml
|
|
Molar absorptivity E(490+/-2nm)
|
Min 70000
|
|
Molar absorptivity E(284+/-2nm)
|
Min 12000
|
|
Molar absorptivity E(238+/-2nm)
|
Min 39000
|
|
Loss on drying (at 105°C)
|
Max 5.0%
|