Cosmetic Science discussion forum. For people who want for formulate cosmetics and get advice from other formulators around the world.
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There are bio-based Butylene Glycols (Brontide for example) that are “natural” (a silly undefined term). The bio-based products are allowable under multiple standards. Consider using one of these and stop using the term “natural” as if it is a defined Technical term. https://brontidebg.com/
Ditto that. I’ve been using Brontide for over a year. No worries. 100% replacement for BG plus same chemistry: 1,3, butanediol. My longstanding mantra is other than freeze point depression anything PG can do BG can do better, only at 2 - 3X the cost per kg.
Fortunately, I work with Prestige Lines which gives us a much better raw material allowance. At the same time their “marketers” will erupt into paroxysms of misinformation if we suggest Propylene glycol at all. We have had great results with a spread of glycerin/Pentiol Eco/Brontide for our glycols.