Specifications :

• Identity (UV/VIS-Spectrum) : passes test
• Absorption maximum λmax. (buffer pH 12.2) : 634 – 640 nm
• Spec. Absorptivity A 1%/1cm (λmax; 0.015 g/l; buffer pH 12.2; calculated on dried substance) : 250 – 400
• Loss on drying (110 °C) : ≤ 10 %
• Suitability as indicator (for metal titration) : passes test