I really don't know.I got a very high dose of the IPE sanding dust on my face for an extended period of time, like 6 hours.Looked like I fell into a fire pit that night.Several trips to dermatologist, steroid shots and pills for a couple years and now use of a hand cream a few times a month as needed.Free and clear laundry detergent, dryer sheets, hand soap, and shampoo now for the past 10 years.It messed up my immune system..