Isotopically Labeled Compounds
Medchemexpress LLC Macitentan-d4 | 1258428-05-5 | 98.0% | 592.30 | C19H16D4Br2N6O4S | 5 MG
Macitentan-d4 is a deuterium-labeled analogue of macitentan provided as an isotope-labeled reference standard for analytical and research applications, particularly as an internal standard for LC-MS or GC-MS quantification and method development.
- High isotopic labeling for accurate mass spectrometry quantification.
- Analytical-grade purity suitable for reference standards.
- Small pack size convenient for assay development and validation.
- Documented chemical and molecular data for traceability.
- Stable when stored per recommended conditions.
Medchemexpress LLC Acetophenone-d8 | 19547-00-3 | MFCD00064447 | 100.0% | 128.20 g·mol⁻¹ | C8D8O | 5g
Acetophenone-d8 is the deuterium labeled Acetophenone Acetophenone is an organic compound with simple structure[1]
Medchemexpress LLC Cariprazine-d8 | 1308278-50-3 | 98.77% | 435.46 | 5 MG
Cariprazine-d8 is a deuterium labeled Cariprazine. Cariprazine is a novel antipsychotic agent candidate that exhibits high affinity for the D3 (Ki=0.085 nM) and D2 (Ki=0.49 nM) receptors, and moderate affinity for the 5-HT1A receptor (Ki=2.6 nM).
- Can be used as a tracer.
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Targets D3 and 5-HT1A receptors.
Medchemexpress LLC Pristane-d40 | 16416-35-6 | 5 MG
Pristane-d40 is a deuterium-labeled version of Pristane (Norphytane), a naturally occurring hydrocarbon oil found in plants, various marine organisms, and as an active component of mineral oil. It functions as a non-antigenic adjuvant, inducing MHC class II-restricted, arthritogenic T cells in rats. Deuteration, which involves substituting hydrogen with deuterium, can affect the pharmacokinetic and metabolic profiles of drugs.
- Can be used as a tracer
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
- Molecular weight of 308.77
- Chemical formula of C19D40
- Appearance is a colorless to light yellow liquid
- Purity of 98.56%
Medchemexpress LLC Aldicarb (sulfone) | 1646-88-4 | 99.46% | 222.26 | 50 MG
Aldicarb sulfone is a metabolite of the carbamate pesticide Aldicarb, exhibiting insecticidal activity. It is also known to be a cholinesterase inhibitor.
- Inhibits egg hatching in *Tylenchulus semipenetrans*
- Reduces nematode motility
- Hindered male larval development
- Decreased plasma pseudocholinesterase levels in rats
- Decreased red blood cell cholinesterase levels in rats
Medchemexpress LLC L-Glutamine-1-13C | 159663-16-8 | 147.14 | 5 MG
L-Glutamine-1-13C is the 13C-labeled L-Glutamine. L-Glutamine (L-Glutamic acid 5-amide) is a non-essential amino acid abundantly present throughout the body and involved in many metabolic processes. It provides a source of carbons for oxidation in some cells.
- Can be used as a tracer.
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Purity: 98.0%.
- Appearance: Solid.
- Color: White to off-white.
Medchemexpress LLC L-Leucine-d3 | 87828-86-2 | 134.19 | 5 MG
L-Leucine-d3 is the deuterium labeled L-Leucine, an essential branched-chain amino acid (BCAA) that activates the mTOR signaling pathway. Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during drug development. 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.
Medchemexpress LLC Banoxantrone-d12 dihydrochloride | 1562066-98-1 | 95.0% | C22H18D12Cl2N4O6 | 10MG
Banoxantrone-d12 dihydrochloride is the deuterium-labeled form of the bioreductive prodrug banoxantrone (AQ4N), supplied as a solid dihydrochloride for research use. It is intended for isotope tracing, mass-shift experiments, metabolic stability, and pharmacokinetic studies, and is provided with ~95% purity (CAS 1562066-98-1).
- Deuterium-labeled for isotope tracing and mass-shift experiments.
- Suitable for metabolic stability and pharmacokinetic studies.
- High purity for reliable analytical and mass spectrometry results.
- Solid dihydrochloride form for convenient handling and storage.
- Well characterized with molecular formula C22H18D12Cl2N4O6 for unambiguous identification.
Medchemexpress LLC Dibutyl phosphate-d18 | 156213-21-7 | MFCD00012206 | >95.0% | C8HD18O4P | 10MG
Dibutyl phosphate-d18 is a deuterium-labeled analogue of dibutyl phosphate (CAS 156213-21-7) used as a tracer and internal standard for quantitative analytical methods. The isotopic labeling enables accurate quantitation and method development in NMR, GC-MS, and LC-MS, and supports metabolite and trace-level studies.
- Deuterium-labeled internal standard for quantitative analysis.
- Suitable for NMR, GC-MS, and LC-MS workflows.
- High isotopic enrichment reduces interference from unlabeled analytes.
- Provided as a stable liquid for easy handling and spiking.
- Available in small milligram quantities for reference and method validation.
Medchemexpress LLC Pefloxacin-d3 | 2733455-58-6 | 99.4% | 336.38 g/mol | C17H17D3FN3O3 | 10 MG
Pefloxacin-d3 is the deuterium-labeled analogue of the fluoroquinolone antibiotic pefloxacin. It inhibits DNA gyrase and interferes with topoisomerase I-mediated DNA relaxation, and is supplied as a high-purity stable isotope for analytical and research use.
- Deuterium-labeled internal standard for quantitative analysis.
- High purity to support analytical accuracy.
- Suitable as a tracer in infection and pharmacokinetic studies.
- Provided as a laboratory-grade powder for analytical workflows.
Medchemexpress LLC Creatinine-d5 | 60-27-5 | MFCD28009754 | 99.9% | 118.15 g/mol | C4H2D5N3O | 10 MG
Creatinine-d5 is a deuterium-labeled internal standard of creatinine used as an analytical reference for isotope-dilution mass spectrometry and other biochemical assays. It provides a stable, isotopically enriched analogue for accurate quantification and method validation in research applications.
- Deuterium-labeled internal standard for LC-MS/MS quantification.
- High isotopic enrichment suitable for analytical accuracy.
- Supplied as a small, stable solid for easy handling and dissolution.
- Intended for research use only; not for human or diagnostic use.
Cayman Chemical RegorafenIb-13C-d3 500ug
An internal standard for the quantification of regorafenib by GC- or LC-MS
Medchemexpress LLC Docetaxel-d5 trihydrate | 812.91 | C43H48D5NO14 | 500 UG
Docetaxel-d5 is a deuterium-labeled analogue of docetaxel intended for use as an internal standard or tracer in analytical workflows, particularly LC-MS/MS assays. It is provided as the trihydrate form with formula C43H48D5NO14 and molecular weight 812.91, packaged in microgram-scale quantities for calibration and quantitation.
- Isotopically labeled (d5) analogue for use as an internal standard.
- Suitable for LC-MS/MS and other mass spectrometry assays.
- Provided as a trihydrate with defined molecular formula and molecular weight.
- Supplied in microgram-scale quantities for assay calibration.
- Intended for research use only; not for human or veterinary use.
Cayman Chemical DIpyrIdamole-d16 5mg
An internal standard for the quantification of dipyridamole by GC- or LC-MS