N-nitroso-propranolol?

Thanks for the information. I attach the link to the mentioned paper, it is a really good one.

Practical and Science-Based Strategy for Establishing Acceptable Intakes for Drug Product N-Nitrosamine Impurities | Chemical Research in Toxicology (acs.org)

Coming back to the topic, that is interesting for sure, because is not the same to have NA above the 18 ng/day limit than to 440 ng/day. This will need careful evaluation for al LOLs.

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