Now you may see it to be a prepositional phrase. I believe (but am not one hundred% guaranteed Until someone supports this) that it will function as being a disjunct adverbial. See Uncoated aspirin tablets, consisting of about ninety% acetylsalicylic acid, along with a minor number of inert fillers and https://g.page/r/CfXOQZg8CC3cEBM