Yeah, that would be nice. There is such thing as a Certificate of Analysis which we are going to try to get from our supplier. http://www.sigmaaldrich.com/unite

Yeah, that would be nice. There is such thing as a Certificate of Analysis which we are going to try to get from our supplier. http://www.sigmaaldrich.com/united-kingdom/technical-services/c-of-a.html http://www.sigmaaldrich.com/united-kingdom/technical-service...