Description NMR/EPR Tube Caps – Disposable Disposable NMR Tube Caps are manufactured from molded PVC or Polyethylene depending on the tube OD. The different colors help track samples based on various reference solvents. When using Chloroform or Acetone as reference solution, please avoid (1) direct contact between the sample and the disposable cap, (2) long term storage over 2 hours. If these conditions are inevitable, please use PTFE NMR tube caps. Details Replace 521-3P-100 blue cap with better chemical resistance to chloroform and acetone. Specifications Fits Tube O.D. (mm): 3.0 Material:Polyethylene Color: Red Package Qty. : 100 Application Notes Automated Handling Cap * Technical Tips: Please avoid using disposable NMR caps (EVA or PE) when CDCI3serves as the reference solution as the material(s) could be dissolved. When using CDCl;3, we recommend PTFE caps (WG-1264-) which are only compatible with our Precision tubes.**Replacement cap with hole for WGS-5BL. ***Cap for Automatic Sampling Systems; 5mm Tube.
