Isotopically Labeled Compounds
Medchemexpress LLC Nordoxepin-d4 hydrochloride | 2249819-14-3 | 99.9% | 305.84 | C18H16D4ClNO | 1 MG
Nordoxepin-d4 hydrochloride is the deuterium-labeled hydrochloride salt of nordoxepin provided for research and analytical use. It is intended primarily as an isotopically labeled internal standard or tracer in bioanalytical, pharmacokinetic, and metabolic studies, and is optimized for accurate quantification in mass spectrometry workflows.
- High isotopic and chemical purity (99.9%).
- Suitable as an internal standard for LC-MS/MS and GC-MS assays.
- Useful for bioanalytical quantification and method validation.
- Deuterium labeling enables tracer and metabolic studies.
- Hydrochloride form improves handling and stability.
- For research use only; not for human or veterinary use.
Medchemexpress LLC Difloxacin-d3 | 1173147-93-7 | 98.0% | 1 MG
Difloxacin-d3 is the deuterium-labeled form of the fluoroquinolone difloxacin supplied for research use as a stable-isotope tracer and internal standard for analytical quantification and metabolic tracing.
- Deuterium-labeled (d3) tracer suitable for LC-MS and GC-MS analysis.
- High chemical purity (~98.0%), appropriate for analytical standards.
- Solid form (white to off-white) with defined handling and storage guidance.
- Small pack sizes enable economical use for calibration and method development.
Medchemexpress LLC Ropivacaine-d7 | 684647-62-9 | 99.69% | 1 MG
Ropivacaine-d7 is a deuterium labeled Ropivacaine. Ropivacaine is a potent sodium channel blocker, inhibiting impulse conduction by reversibly blocking sodium ion influx in nerve fibers. It also acts as an inhibitor of K2P (two-pore domain potassium channel) TREK-1 with an IC50 of 402.7 μM in COS-7 cell membranes. Ropivacaine is used for the research of neuropathic pain management, and is for research use only.
- Can be used as a tracer.
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
Medchemexpress LLC Velnacrine-d4 hydrochloride | 1246816-08-9 | 98.6% | 1 MG
Velnacrine-d4 hydrochloride is a deuterium-labeled form of Velnacrine, intended exclusively for research purposes. This compound is not sold to patients. The incorporation of stable heavy isotopes, such as deuterium, into drug molecules serves as tracers for quantitative analysis in drug development, with deuteration potentially affecting pharmacokinetic and metabolic profiles.
- Can be used as a tracer
- Can be used as an internal standard for quantitative analysis by nuclear magnetic resonance (NMR), gas chromatography-mass spectrometry (GC-MS), or liquid chromatography-mass spectrometry (LC-MS)
Medchemexpress LLC Prostaglandin D2-d4 | 211105-29-2 | 98.8% | 356.49 | C20H28D4O5 | 50 UG
Prostaglandin D2-d4 is a deuterium-labeled analogue of prostaglandin D2 supplied as a solution in methyl acetate for use as an internal standard in GC- or LC-MS assays. It is intended for research use to support accurate quantification of PGD2 in biological samples and analytical workflows.
- Deuterium-labeled internal standard for PGD2 quantification by GC- or LC-MS.
- High chemical purity (98.8%) for reliable analytical performance.
- Supplied as a microgram-scale solution suitable for trace-level analyses.
- Stable when stored at -20°C for up to two years.
- Molecular formula C20H28D4O5 and molecular weight 356.49 aid compound identification.
Medchemexpress LLC Glycine-1-13C | 20110-59-2 | MFCD00037548 | 99.4% | 76.06 g/mol | C13CH5NO2 | 100mg
Glycine-1-13C is the 13C-labeled Glycine Glycine is an inhibitory neurotransmitter in the CNS and also acts as a co-agonist along with glutamate facilitating an excitatory potential at the glutaminergic N-methyl-D-aspartic acid (NMDA) receptors
Cambridge Isotope Laboratories Pyridoxal phosphate (methyl-D3 97%) mix of 5- 3-isomers CP 95% 1 mg
Pyridoxal phosphate (methyl-D3 97%) mix of 5- 3-isomers CP 95% 1 mg
Cambridge Isotope Laboratories Perchloric acid sodium salt (unlabeled) 100 ug/mL in water 1 2 mL
Perchloric acid sodium salt (unlabeled) 100 ug/mL in water 1 2 mL
Medchemexpress LLC Ribitol-2-13C | 488-81-3 | 98.0% | 153.14 | C4 13CH12O5 | 5 MG
Ribitol-2-13C is a stable isotope-labeled form of ribitol used as an internal standard and analytical reference in metabolomics, mass spectrometry, and isotope-tracing studies. It is supplied as a high-purity, accurately quantified material suitable for calibration, quantitation, and method development.
- Stable-isotope labeled ribitol for accurate internal standardization.
- High purity, 98.0%.
- Supplied as a precisely weighed milligram-scale powder for analytical workflows.
- Suitable for metabolomics, LC-MS/MS, and isotope-tracing experiments.
- Includes documentation such as SDS and data sheet for safe handling.
![Revvity Health Sciences Inc Cyclopentyl-1,3-Dipropylxanthine, 8-[Dipropyl-2,3-<sup>3</sup>H(N)]-, 1mCi (37MBq)](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502811004.jpg-250.jpg)
Revvity Health Sciences Inc Cyclopentyl-1,3-Dipropylxanthine, 8-[Dipropyl-2,3-3H(N)]-, 1mCi (37MBq)
Cyclopentyl-1,3-Dipropylxanthine, 8-[Dipropyl-2,3-3H(N)]-, 1mCi (37MBq)
Cambridge Isotope Laboratories CORTISONE (2,2,4,6,6,9,12,12-D8, 98%), 1 MG
CORTISONE (2,2,4,6,6,9,12,12-D8, 98%), 1 MG
Medchemexpress LLC Thymidine-13C | 478511-06-7 | 243.22 | 5 MG
Thymidine-13C is the 13C labeled Thymidine. It is a specific precursor of deoxyribonucleic acid and functions as a cell synchronizing agent. Thymidine is also a DNA synthesis inhibitor capable of arresting cells at the G1/S boundary, before DNA replication.
- Can be used as a tracer.
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Stable heavy isotopes are incorporated into drug molecules for quantitation during drug development.
- Deuteration has the potential to influence the pharmacokinetic and metabolic profiles of drugs.
Cambridge Isotope Laboratories Glycan-O33-13C-Gal6 (galactose-13C6 99%) 500 pmol
Glycan-O33-13C-Gal6 (galactose-13C6 99%) 500 pmol
Medchemexpress LLC Fmoc-leucine-d10 | 1190594-22-9 | MFCD06658583 | 99.4% | 363.47 | C21H13D10NO4 | 10 MG
Fmoc-leucine-d10 is a deuterium-labeled, Fmoc-protected L-leucine supplied for use as an isotopically labeled building block in peptide synthesis and as an analytical standard. The material is provided in small laboratory quantities with supporting quality and safety documents available.
Cayman Chemical Ospemifene-d4, Purity: ≥99% deuterated forms (d1-d4), 1 mg
An internal standard for the quantification of ospemifene by GC- or LC-MS