Class 4 Chemical Test

Class 4 and 6 chemical indicators are placed inside packages or devices to monitor sterilization processes and should only be used for solid and porous objects. These indicators only provide information about the sterility of the packages at the points in the sterilizer where they are placed.

It is recommended to place these indicators in the innermost part of the packages where the sterilizing agent has difficulty penetrating. Due to the long response time of biological indicators (at least 2 days), chemical indicators are used in the daily control of sterilization processes.

The advantage of such indicators is their short response time, and therefore, after this process, the correct operation of the device can be immediately ensured. Class 4, 5, and 6 chemical indicators have different functions.

Color Change

After the sterilization cycle, the indicator changes color from blue to black.
-1 at 134°C for 3.5 minutes
-2 at 121°C for 15 minutes

Class 4 Indicator Specifications

-Compliant with ISO 11140-1
-Color change from blue to black
-Disposable
-Free of any lead or other heavy metals
-Includes production and expiration date on each indicator label

How to use a Class 4 indicator

1. Place one indicator in each pack and prepare it for sterilization. Place the indicator in the part of the pack that is furthest from the steam. For larger packs, place the indicators in different parts of the pack.
2. Sterilize the pack according to standard procedures.

3. After the sterilization cycle, check that the indicator has changed color from blue to black.
4. If the indicator has not turned black, it indicates poor sterile conditions and the sterile conditions and indicator should be checked.

Storage conditions:

Store at room temperature 10-38°C and humidity 10-70%, away from oxidizing agents and liquids.

Packaging

– 250 pieces per pack
– 42 packs per carton