Phenolphthalein indicator 100 gr MERCK 107233

Product Information CAS number 77-09-8 EC index number 604-076-00-1 EC number 201-004-7 Grade ACS,Reag. Ph Eur Hill Formula C₂₀H₁₄O₄ Molar Mass 318.32 g/mol HS Code 2932 20 10 Specifications Identity (UV/VIS-Spectrum) passes test Appearance White to yellowish white powder Clarity of the alkoholic solution (10 g/l ethanol) passes test Absorption maximum λmax. (buffer pH 9.8) 551 - 554 nm Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 9.8; calculated on dried substance) 700 - 750 Transition range pH 8.2 - pH 9.8 almost colorless - red-violet Transition range (according to ACS) passes test Transition interval (according Reag. Ph. Eur.) passes test Loss on drying (105 °C) ≤ 1 %