Ethylene Oxide Sterilization Indicator Card Changes from Red to Purple What it Means

The Ethylene Oxide Sterilization Indicator Card turning from red to purple usually means that the sterilization process has been completed. The ethylene oxide sterilization indicator card is a special card used to detect the temperature and humidity inside the ethylene oxide sterilizer, and its working principle is to determine whether the sterilization process has reached the predetermined conditions through a chemical reaction.

During the sterilization process, when the concentration of ethylene oxide, temperature, time, etc. reaches a certain level, the chemicals on the red sensing area will change, causing the color to change from red to purple. This change indicates that a certain temperature, humidity and concentration requirements have been met inside the ethylene oxide sterilizer to kill microorganisms, thus achieving the purpose of sterilization.

It is important to note that the sterilization process is complete only when the sensory area of the sterilization indicator card turns completely purple. If the indicator card only partially changes color or does not change color, it means that the sterilization conditions are insufficient to ensure the sterilization effect. In this case, it is necessary to carry out the sterilization operation again and use a new sterilization indicator card to verify the sterilization effect.

In short, the color change reaction of the ethylene oxide sterilization indicator card can help determine whether the temperature, humidity and concentration inside the ethylene oxide sterilizer have reached a certain level of requirements, so as to ensure that the goods are effectively sterilized.