Grade guide
Deuterated & Stable-Isotope-Labelled Compounds chemicals
Compounds enriched with deuterium, ¹³C or ¹⁵N for use as internal standards in mass spectrometry, NMR solvents and mechanistic or metabolic studies.
1,488 Deuterated & Stable-Isotope-Labelled Compounds products
![Norepinephrine-[d6] Hydrochloride chemical structure](/media/structures/FQTFHMSZCSUVEU-GVFLBQLQSA-N.svg)
FAQs
How much mass difference should an internal standard have?
At least 3 Da is a common rule of thumb, so that the analyte's natural isotope peaks do not interfere with the internal standard signal.
What is isotopic enrichment?
The percentage of atoms at the labelled positions that are the heavy isotope, for example 99 atom % D.
Are deuterated compounds radioactive?
No. Deuterium, carbon-13 and nitrogen-15 are stable isotopes. Radioactive labels such as tritium or carbon-14 are a separate category.
Other grades
HPLC GradeGC GradeAR Grade (Analytical Reagent)ACS GradeLR Grade (Laboratory Reagent)Extra Pure GradeMolecular Biology GradeSpectroscopy GradeLC-MS GradeIP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)Ph. Eur. Grade (European Pharmacopoeia)Food Grade (FCC)Technical GradeElectronic GradePharmaceutical Secondary Reference Standards
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