As a sterile processing manager, encountering unexpected dark grey streaks and haze on aluminum sterilization containers can be perplexing, especially when it coincides with the installation of a new washer and detergent. Despite the new detergent consistently passing weekly cleaning tests, the question arises: can a good cleaning agent also cause discoloration?
In this instance the answer lies in the details. Upon facing this issue, the department wisely requested the cleaning instructions from the container manufacturer. The instructions for use (IFU) recommended a neutral “mild” detergent. However, how do we ascertain if the detergents in use meet the device IFU?
Investigating Detergent Compatibility with Device IFUs
- Review the Product Label: Although product labels provide some information, they rarely offer a complete answer about the detergent’s compatibility with specific materials.
- Examine Safety Data Sheets (SDS): A more comprehensive approach involves reviewing the detergent's safety data sheets (SDS), particularly Section 9. This section lists chemical and physical properties such as color, odor, and crucially, pH levels.
Interpreting pH Information in the SDS
The pH scale is pivotal in understanding the potential impact of detergents on different materials:
Acidic: pH 1.0 - 6.9
Neutral: pH 7.0 - 8.0
Alkaline: pH 9.5 - 14.0
In this case, the enzymatic detergent used for manual pre-cleaning had a neutral pH of around 7.8, aligning well with the IFU recommendations. However, the new washer detergent had a pH of 12.6, indicating high alkalinity. Even when diluted in the wash cycle, this alkalinity level can affect aluminum adversely, potentially leading to the observed discoloration.
Steps to Ensure Material Compatibility and Preserve Instrumentation
- Careful Review of Cleaning Instructions: Always start with the device’s IFU to understand the recommended cleaning agents and procedures.
- Detailed Analysis of Cleaning Chemicals: Use the SDS to check the chemical properties of each cleaning agent, focusing on the pH level to ensure compatibility with the materials of your devices.
- Consult with Manufacturers: If there’s any uncertainty, contact the detergent or device manufacturer for further clarification on compatibility.
- Regular Monitoring and Testing: Conduct regular tests and inspections to monitor any changes in the condition of the sterilization containers and other instruments.
By taking these steps, you can mitigate the risk of material damage and ensure the longevity and proper functioning of your sterilization containers and other equipment. Understanding the chemical nature of your cleaning agents like the Spec Clean™ Alkaline Instrument Detergent and their interaction with different materials is key to maintaining a high standard of cleanliness and safety in your sterile processing department.