There are 2 types of savon noir. Although they are similar in color and texture, they do not have the same composition. The savon noir for body care is made from an olive paste (crushed olives and macerated olives) in salt and potassium (olivate potassium). It is found in the form of a soft paste of a brown more or less dark. Savon noir as household soap, is composed of potash and and fatty substance, olive oil, linseed oil, glycerine … It is the second one you should look for.
I think an equivalent is insecticidal soap.
