I believe that's why some people don't like to use it because of the use of solvents to extract oil from the remaining pulp. However, I know there are some experienced and knowledgeable soapers on this forum who only use pomace. So, it may not be a big concern. After all, chemical solvents are used in food processing for many things. Think of it this way - lye is also used in food processing. Yes, we eat lye! :shock:
I do know originally hexane was used and there was a small possibility some hexane could remain in the oil. However from what I've read, companies that manufacture oils are have been discontinuing the use of it. (I think this started back in 2010. Don't hold me to that date - I may be wrong.) I don't know what they're using as a replacement. Does it say on the container who the manufacturer is and list a website for info?
I used to use OO from local stores but I ended up buying a 50 lb container from soaperschoice.com. It worked out cheaper even with shipping added to the price. I decided I was using so much OO that I might as well buy a larger amount and save some money.
Where did you get the FO? I've heard people have had problems with florals accelerating and seizing. I've only used Peak's lilac and it was well behaved. I didn't have any problems with it.