The Mercury ChemWipe 306 is a colorimetric surface wipe designed to provide real-time indication of the presence of trace amounts of mercury and mercury II compounds on surfaces. The Mercury ChemWipe is selective and sensitive. The unique design of the ChemWipe provides uniform color change formation enabling user to quantify chemical contamination using the color comparator. After using the Mercury Surface Wipes, use the Mercury Color Comparator to quantify the mass of mercury collected on the Mercury Surface Wipe