It's important to note that "aduasa" can also refer to other types of soap, so it's best to specify if you're talking about black soap made from palm oil and ash. You could say:
* "aduasa a wɔyɛ no fi ngo ne nsɔ" (black soap made from oil and ash)
* "aduasa a wɔyɛ no fi ngo a wɔatɛ no" (black soap made from palm oil)