Isotopically Labeled Compounds

Chemicals to which isotopes have been attached in order to label specific atoms. Isotopically labeled compounds are commonly used in synthetic chemistry, characterization techniques such as NMR, and biology.

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3,841 – 3,855 of 8,944 results

3,841

Cambridge Isotope Laboratories D-XYLOSE (1,2-13C2, 99%), 0.25 G, 201741-00-6

D-XYLOSE (1,2-13C2, 99%), 0.25 G, 201741-00-6

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3,842

Medchemexpress LLC (Rac)-Atropine-d3 | 1276197-36-4 | 99.1% | 1 MG

(Rac)-Atropine-d3 is the deuterium labeled (Rac)-Atropine. It can be used as a tracer and as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS. Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs.

Used as a tracer
Used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
Stable heavy isotope incorporated into drug molecules
Deuteration can affect pharmacokinetic and metabolic profiles of drugs

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3,843

Medchemexpress LLC MEDCHEMEXPRESS LLC

5000296375 L-CYSTINE-15N2 10MG

Pricing & Availability

3,844

Medchemexpress LLC L-glutamine-13C5,15N2 | 285978-14-5 | 98.0% | 153.09 g/mol | 13C5H10 15N2 O3 | 10 MG

L-Glutamine-13C5,15N2 is an isotopically labeled form of L-glutamine in which five carbon atoms are 13C and two nitrogen atoms are 15N. Supplied as a 10 mg solid with 98.0% purity, it is intended for use as an internal standard, tracer, or NMR reference in metabolic and mass spectrometry studies.

Isotopically labeled (13C5, 15N2).
High purity: 98.0%.
Supplied as a 10 mg solid.
Suitable for metabolic tracing and flux analysis.
Appropriate as an internal standard for mass spectrometry.
Useful for NMR and structural studies.

Pricing & Availability

3,845

Medchemexpress LLC Thiabendazole-d4 | 1190007-20-5 | 98.8% | 205.27 g/mol | C10H3D4N3S | 10 MG

Thiabendazole-d4 is the deuterated isotopologue of thiabendazole, supplied as a solid stable isotope-labeled reference material for analytical and research use. It is formulated for use as an internal standard and reference in mass spectrometry and quantitative assays.

Deuterated internal standard for mass spectrometry and quantitative assays.
High chemical purity (98.84%) for reliable analytical performance.
White to off-white solid, suitable for handling and weighing.
Available in small, accurately weighed sizes for reference and calibration.
Powder stable at -20°C for long-term storage; solvent stability is limited and should follow recommended conditions.