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Residual Chlorine on Printed Circuit Boards

Q. We have found chlorine present on our printed circuit boards after ultrasonic cleaning and distilled water rinse.  As ultrasonic cleaning detergent, we’re using either Liquinox or Detergent 8, but are unsure which one was used on affected boards.  Could either be contributing to this issue?

A. It’s highly unlikely that either detergent, or your cleaning process, is the source of the chlorine residue.  The cleaning process you described, if using detergent at recommended dilution levels, should successfully remove flux and process residues.  

Detergent Color Variations

Q. The color of our Liquinox is slightly different by lot number. Why is this happening? Is there an issue, perhaps we have done something wrong with storage?  

A. Do not fear! These color variations are normal. There is a range of acceptable color differences in Liquinox detergent. Differences in the age and storage conditions of the raw materials and of the Liquinox detergent itself will account for differences in color

Replacing Hazardous Acids

Q: What can I use to replace hazardous acids below pH 1 cleaning?
A: Depending on exactly what you are using your acid cleaning to do, we may be able to help you.

Medical Device Cleaning and Biocompatibility Data

Q. What types of biocompatibility data does Alconox, LLC provide for detergents commonly used in medical device cleaning validation?
A. Setting residue acceptance limits as part of your medical device cleaning validation is much easier when appropriate biocompatibility data is available about the critical cleaning detergent you are using. To help assess the biological effects of cleaner residues, Alconox, LLC conducted extensive evaluations of biocompatibility of its Liquinox and Citranox detergents.

How to Clean Labware: Don’t Use Grocery Store Detergents

Q. We use grocery store detergents to clean our labware and it recently came to my attention that we may need to switch to a laboratory grade detergent such as Alconox or Liquinox. Why is that necessary?

A. Here are some insights as to why a grocery store detergent is not suitable for use in a lab…

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