looks effective above 0.5%. i mix for 0.75% to keep a bit of tolerance for mixing error while staying below 1% for nasal use.
if you are diluting an otc product to get desired concentrations, check for toxicity of additives esp if the product is marketed for external use only.
some potential cilotoxicity for povidone iodine at high concentrations
https://pubmed.ncbi.nlm.nih.gov/25363372/
ok- looking ranges: https://pubmed.ncbi.nlm.nih.gov/32520599/
looks effective above 0.5%. i mix for 0.75% to keep a bit of tolerance for mixing error while staying below 1% for nasal use.
if you are diluting an otc product to get desired concentrations, check for toxicity of additives esp if the product is marketed for external use only.
Thank you for adding this!
low concentration pi solution is not very stable iirc. store away from sunlight. use glass, not plastic for storage