WILWG-1228-7-5 - 5 mm NMR Economy Sample Tube, 7" L, 400MHz / PK 5

General description:

Wilmad-LabGlass Economy NMR Tubes are manufactured from borosilicate glass that meets the ASTM Type 1 Class B standard and recognized as N51A. Due to its nature, this glass has much less thermal-shock resistance than Class A glass used for our Precision Tubes. It may contain Fe2O3 which is paramagnetic (1200 ppm) and has certain impact on shimming quality depending on the magnetic field strength. Economy tubes are recommended only for experiments with small organic molecule (Molecular Weight ~500) at ambient temperature only. Each tube comes with a disposable cap.Cooling/heating of these tubes may lead to breakage.