Lauroyl versus Cocoyl

I have to admit that I am unsure about the differences between a
surfactant that is listed as "Lauroyl" versus "Cocoyl".  As an example:
Sodium Lauroyl Methyl Isethionate and Sodium Cocoyl Isethionate.  Which would be higher in lather characteristics and which would be more conditioning or more gentle to the skin?   I was under the assumption that since Cocoyl is based on coconut fatty acids that it would have better lather and that Lauroyl is based on Lauric acid it would be more conditioning but many data sheets rave how wonderful the lather of something like Sodium Lauroyl Methyl Isethionate describing it as having "creamy lather and long-lasting bubbles".

Thanks for your assistance!


  • @David: I have oftentimes been mislead by product literature, so I strongly recommend you do your own testing. Search this forum for blender foam testing. I've been doing this kind of testing with the dozen or so surfactants that I own to get an objective comparison. Some of the results were expected, but many were pretty startling since I had made assumptions based on TDSes and other manufacturer data. I think you and I are in the same boat--we're relative newbies here, and I think you'll learn a lot from the testing; I know I did!
  • thebrain, thanks for your input!  I have been leery about the claims on product literature especially since some made different claims for the same product!  I came to realize that marketing within the field is just as suspect as product marketing!  I did come across some photos of blender foam tests which I will have to relocate and I will keep looking on here as well with your suggestion in mind, thanks!

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