MERCK 106076 Methyl red (C.I. 13020) indikator 25 GR

Description Brand : MERCKMILLIPORE made in Germany Catalogue Number 106076 Packing : 25 GR (glass Bottle) Synonyms 4-Dimethylaminoazobenzene-2'-carboxylic acid Product Information CAS number 493-52-7 EC number 207-776-1 Grade ACS,Reag. Ph Eur Hill Formula C₁₅H₁₅N₃O₂ Molar Mass 269.31 g/mol HS Code 2927 00 00 Specifications Identity (UV/VIS-Spectrum) passes test Appearance Red to red-violet powder, eventually with granular parts. Clarity of solution (1 g/l; ethanol) passes test Melting point (capillary method, temperatur measerment in the heating block) 179 - 182 °C Transition range pH 4.4 - pH 6.0 Red - yellow Absorption maximum (buffer pH 4.5) 523 - 526 nm Absorption maximum (buffer pH 6.2) 427 - 437 nm Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 4.5; calculated on anhydrous substance) 1350 - 1500 Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; buffer pH 6.2; calculated on anhydrous substance) 700 - 800 Transition range (according to ACS) passes test Loss on drying (110 °C) ≤ 5 %