Categorized | Citranox, Laboratory

Replacing HCl to remove MnO2

Q. Currently using Hydrochloric Acid (HCl) to remove residual Manganese Oxide (MnO2) from glassware. Following ASTM D1721 instructions. Do you offer a cleaner that could do the same job as the HCl and remove the MnO2?

A. Yes, replacing HCl is possible, and in fact good practice. Use a 2% solution of Citranox® Liquid Acid Cleaner and Detergent (2.5 oz/gal or 20 mL/L)  followed by a thorough rinse to remove Manganese Oxide from glassware.  The mild organic acid chelating agents in the detergent will remove MnO2 more safely than hydrochloric acid (Citranox concentrate is at pH 2.5).  Additionally, as we are comparing a complex acidic detergent to a straight reagent, the Citranox cleaner will provide a more robust removal of residue.  This would include organic oils, including fingerprints, and other inorganic residues that may not have high solubility in HCl.

If you’d like to try a sample of Citranox liquid concentrate, please fill out the questionnaire to Request a Sample. For more detailed information about Citranox detergent, consult the SDS or Technical Bulletin.