3,3′,5,5′-Tetramethylbenzidine Clear to light brown liquid. 1.19 mM H2O2 in a proprietary solvent, 1.13 mM TMB, pH 4.9 ± 0.03. PROTECT FROM LIGHT. Peroxidase substrate that produces a stable, insoluble, aquamarine blue precipitate at reaction site with little or no background. RTECS DV2300000, CAS 54827-17-7. |