ChemicalName:5,10,15,20-Tetrakis(N-methylpyridinium-4-yl)-21H, 23H-porphine, tetrakis(p-toluenesulfonate)
Appearance: Purple powder
Molar absorptivity (Cu complex): ≥140,000 (around 423 nm)
Molar absorptivity (in acidic solution): ≥280,000 (around 445 nm)
MW: 1363.61, C72H66N8O12S4
Storage Condition: ambient temperature, protect from metal
Shipping Condition: ambient temperature
TMPyP is a highly sensitive colorimetric reagent for Cu. Its proton dissociation constants are reported to be pKa1=0.8 and pKa2=2.06. The maximum wavelength of the Soret band is 422 nm (molar absorptivity: 149,000) at pH 4-7. In 1 M HCl solution, the maximum wavelength of the Soret band is 446 nm (molar absorptivity: 193,000).