Help with Isopropyl myristate

[Obsidian]

I have a simple lotion recipe that I'd like to add some Isopropyl myristate too, any recommendations on amount? What would I sub it for or is it a separate additive?

This my recipe. I'm out of dimethicone so I just add in a bit more oil.
67% water
3% glycerin
13% oils
5 % butter
3 % stearic acid
5 % ewax
1% fragrance
1% preservative
2% dimethicone

 

[lsg]

Lotion Crafters lists usage rate as 1% to 10%. They use 3% in a their skin cream formula.

https://www.lotioncrafter.com/formulary/Jens_Bodacious_Cream.pdf

Comparing your recipe to theirs, I would think it would be a separate additive.

 

[Obsidian]

Thanks, I was just coming back here to say I think I got it figured out. This is my new recipe, look ok? I have a very hard time with lotion, I can't quite figure out how to determine how much stearic/e-wax to use.

https://www.evernote.com/l/ANgVntbiuDdKn5B1kUX6Cf0z1ifsd27zdc8/

 

[Cellador]

Your recipe looks ok to me. Typically, I use emulsifier around 20-25% of the combined oils & butters, but it really can depend on the type of emulsifier you are using.
I have used thickeners at 2% to 3%, but I rarely use them in lotion anymore. To me, they really don't improve the skin-feel of the lotion. If I need it to be thicker, I'll reduce the water amounts.