Specifications :

• Identity (UV/VIS-Spectrum) : passes test
• Absorption maximum λmax. (Sodium hydroxide solution 0.1 mol/l) : 577 – 580 nm
• Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; sodium hydroxide solution 0.1 mol/l; calc. on anhydrous substance) : ≥ 750
• Water (according to Karl Fischer) : ≤ 10 %
• Suitability as indicator (for metal titration) : passes test