Where are irradiation dots and what do they mean?
Irradiation indicators are not an indication of sterility. They indicate that product has been exposed to irradiation. The color changes from yellow to red due to a shift in pH. Indicators are typically placed on the outer packaging (on the case) for inventory control purposes. Indicators can also be placed on inner packages. Under some conditions such as high heat, prolonged UV light, direct sunlight or exposure to alkaline conditions the irradiation indicators may turn orange or orange-yellow. Because of this they should not be depended upon to indicate sterility of the product.
