Castor Oil Dos

[ohsoap]

What percentage of Castor oil can I use without running the risk of DOS.

I'm asking because I made two batches of soap, with all the same ingredients, same lye % and same SF, and stored in the same conditions. One was Lavender EO, the other was Lavender Mint EO.
My recipe is almost identical but the one has
21% Palm
5% Castor oil
3.5% Cocoabutter
No Dos

The other is
15% Palm
8% Castor
6% Cocoa butter
Has Dos

 

[andreja]

Well, I made soap with up to 10 % of castor oil and haven't had DOS on any one (yet). But then again, I started soaping in April. What else is in your soap?

 

[Bigmoose]

I made some shampoo bars some time ago with about 20% that held up fine.

Bruce

 

[kittywings]

Are you thinking of canola causing dos? I've never heard that castor tends to up the risk....

 

[Bubbles Galore]

If you're using olive oil in the recipe, make sure that it is from a reliable source. Sometimes it is mixed with some Canola and passed off as pure olive oil.

 

[Vintageliving]

I use from 5 - 11% and haven't had problems with the castor.

 

[southernvtsoap]

By any chance is it the one with the mint that has the DOS? If so, then that is probably the culprit. I use castor up to 10% in every batch and the only time I have ever gotten DOS was in a bar with peppermint eo.

 

[ohsoap]

Yes it was the one with the mint. I had someone else say that mint also causes dos, they also said it is more prone when combined with Lavender EO. Maybe I should try mixing my Lavender with Peppermint FO instead.