It is normal for iodophor to turn white due to the oxidation reaction of iodophor when it encounters oxygen in the air and the color changes. It is normal for iodine to turn white when it encounters alcohol or vitamin C. The chemical reaction between them will also cause iodine to appear white. Iodine volts turn white will not cause harm to humans, but the effect of disinfection and sterilization after the chemical reaction may not be very good, so it needs to be used reasonably according to the actual situation. Iodine volts have a combination of monomeric iodine as well as organic substances, and these organic solutions contain povidone, which is tan in color, and once it meets special substances a chemical reaction will occur, which will cause the color to be lost and turn white. Iodophor is more common in life, mainly used for disinfection and sterilization after skin breakage, the color changes, either caused by a chemical reaction or due to expiration, in this case should be avoided to continue using, not only is not to achieve the therapeutic effect, and even lead to skin allergic reactions, to pay attention to the correct identification.