Designed for routine use in all NMR spectrometers, Wilmad Economy NMR Tubes have the best OD tolerance in the industry and a 30% thicker wall than any competitors' product. They are guaranteed to fit tightly in any spinner turbine and have zero NMR background. The camber and concentricity values listed are the Total Indicator Reading (TIR). Made from borosilicate glass that meets the ASTM E438 Type 1 Class B standard, recognized as N51A, they come with a disposable cap. Manufactured in an ISO 9001:2008 USA facility, they go through a 100% visual and physical inspection to ensure quality, including physical dimensions and surface defects.
Economy tubes are recommended only for experiments with small organic molecules (Molecular Weight ~500) at ambient temperatures only. Cooling/heating of these tubes may lead to breakage. For NMR experiments that involve cooling, heating, biological sample, multi-dimension, multi-nuclei or DNP techniques, please refer to Wilmad Precision NMR Tubes.
Note: Caps are not recommended for use with samples dissolved in chloroform-d or acetone-d6.