In labelling an isopropanol hand sanitizer in the UK (which I gather would be regulated as a biocide in the EU, not a cosmetic), should a contaminant of one of the ingredients be listed on my ingredients label? Sepimax Zen lists 1-5% 2-methylpropan-2-ol on its SDS as a contaminant. This would be 100-500ppm in the final product. The hazard symbols at least would be the same, because it's similar to the isopropanol, but should it be listed on the ingredients section, too?
Should this be on my SDS but not label? I'm not making a product for sale, so I'm not familiar with the regulations and just trying to get familiar as a exercise, really.