Behentrimonium methosulfate is a sulfate from a chemistry point of view. If a lawyer decided to sue you what would your defense be? I understand that it’s not the same as SLS or SLES but I don’t think you should claim sulfate free if you use that. It will also confuse consumers since the word sulfate is literally in the name.
@Camel Interestingly, Behentrimonium chloride or methosulfate have a max allowed dose (5% I brlieve) according to Cosing, precisely because of cationic's irritation potential, while SLES has no restriction. Also, SLES is always used at significantly higher dose than BMTS, which is not a fair comparison.
Exactly, it cannot be stated (in EU) that a product is free of permitted ingredients, because it's discrimination against other manufacturers, just as it is forbidden to indicate "free of" ingredients that are prohibited. In fact, there are very few "free of" options that are allowed.
It looks like you're new here. If you want to get involved, click one of these buttons!