ADACX form sterilization indicator label is designed to identify materials which have been sterilized (e.g. bags, packages, bottles) by formaldehyde. Form indicator label is presented in roll with 1000 pieces. The form sterilization indicator label color changes from purple to green in formaldehyde sterilization process. The form sterilization indicator label belongs to ISO11140-1 CLASS 1.The form sterilization indicator label could be used in any formaldehyde sterilizer.