H2O2 Visible Spectrum
For practical purposes, H2O2 solutions are transparent for radiation to which the eye is sensitive (i.e., between 4000 and 8000 Angstroms). In bulk solutions, however, H2O2 will appear slight pale blue with a nuance of green. The yellow to green tint is attributed to light scattering of entrained bubbles; whereas the blue note is similar to that seen in water.