Displaying 20 results of Cyanocobalamin Impurities Cyanocobalamin is a synthetic form of vitamin B12 commonly used as a dietary supplement. However, like all synthetic compounds, cyanocobalamin may contain impurities that can be harmful to humans. These impurities can include residual solvents, heavy metals, and other organic and inorganic compounds that may cause adverse effects. It is therefore important to ensure that cyanocobalamin products are carefully tested and monitored for impurities to prevent any potential health risks.