Why orange silica gel can desiccant change color when adsorbing moisture?
The orange silica gel desiccant will change from yellow to green. The reason for the discoloration is that the silica gel contains methyl violet, and the color of methyl violet will change due to the change of pH. It uses methyl violet in the range of pH0.13-0.5 "Yellow→Green" occurs.
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- 2025-06-10层析硅胶-Chromatography Silica GelIn pharmaceutical production, chromatography silica gel is widely used due to its high adsorption, chemical stability, and controllable pore diameter.
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