Unless it is contaminated it doesn't seem to get much better than 99.9 % pure. It is made from the inter part of trees left over from a sawmill cuttings and sawdust. They truck it into a to factory process it in to a solvent. The only contamination I can think of is if some cross contamination when processing, and that would carry whatever is mixed with it deep into tissue. Thats what it does, goes deep into the tissue, used for many years as a muscle rub on Horses, and Livestock. It is closely related to MSM only one molecule apart. Tel Tofflemire Dewey, AZ.
________________________________ From: "zzekel...@aol.com" <zzekel...@aol.com> To: silver-list@eskimo.com Sent: Sun, January 16, 2011 1:30:30 PM Subject: Re: CS>DMSO In a message dated 1/15/2011 2:42:12 P.M. Eastern Standard Time, blacksa...@comcast.net writes: Does anyone know where you can purchase 100% pharmaceutical grade DMSO (in glass bottles)?I’ve got the industrial strength 99.9% pure from the local Agway store and I understand it really shouldn’t be used due to the impurities. I’m in the Northeast so would love to hear from everyone, but certainly northeastern places would help with shipping costs.Thanks.Lisa Hi Lisa, I've bought mine at the local farm supply for years & it works great. Both internal & external..." If it's good enough for multi million dollar race horses" it sure is good enough for my family--friends--pets--& me...Lois