双硫腙 [铅试剂]，Dithizone；for analysis (1,5-diphenylthiocarbazone) Reag. Ph Eur, ≥98% (argentometric)

Assay (argentometric): ≥ 98.0 %
Identity (IR-spectrum): passes test
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (Chloroform): 604 - 607 nm
Spec. Absorptivity A1%/1cm (λ_max.; 0,005 g/l; chloroform): ≥ 1522
Absorption ratio (605 nm / 445 nm;0.005 g/l; choroform): ≥ 2.5
Sulfated ash (600 °C): ≤ 0.2 %