Analysis Note This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO Guide 34. This CRM is traceable to NIST SRM. General description Certified content by quantitative NMR incl. uncertainty and expiry are given in the certificate.Download your certificate at: http://www.sigma-aldrich.com. Other Notes Chemcial Shift: 8.1 and 3.9 ppm (chemical shifts may slightly vary depending on the experimental conditions)Suitable NMR solvents: Acetonitrile, Chloroform, MeOD, DMSO-d6 Legal Information TraceCERT is a registered trademark of Sigma-Aldrich Co. LLC |