If you make soap by the hot process method and you need to know the flashpoints of the fragrance oils you have purchased from a particular company, I have found the following links:
For these companies, they list the flashpoint with the description of the fragrance oil they sell:
If you are interested in the flashpoints for essential oils, I learned from Deanna Sauter who I took a Hot Process Soapmaking recommends:
If anyone out there makes their soap by the hot process method and may have additional websites that you would like to add to this list, please let me know and I will add it to the list. Any information will help. Thanks.