Isotopically Labeled Compounds
Medchemexpress LLC Sitagliptin-d4 phosphate | 1432063-88-1 | MFCD25973056 | 99.5% | 509.33 | C16H14D4F6N5O5P | 5 MG
Sitagliptin-d4 phosphate is the deuterium-labeled isotopologue of sitagliptin phosphate used as an analytical reference standard. It is intended for LC-MS/MS quantitation, method development, and pharmacokinetic studies, providing consistent mass shift for accurate internal standardization and reliable assay performance.
- Deuterium-labeled internal standard for LC-MS/MS quantitation.
- High chemical purity and confirmed isotopic enrichment.
- Suitable for method development, calibration, and pharmacokinetic studies.
- Provided as a phosphate salt for stability and solubility.
- Available in small-mass package sizes suitable for analytical use.
Medchemexpress LLC Glycine-2-13C,15N | 91795-59-4 | MFCD00064424 | 98.0% | 77.05 | C13CH515NO2 | 50mg
Glycine-2-13C 15N is the 13C- and 15N-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 NITROMETHANE (15N, 98%+), 1 G, 23717-53-5
NITROMETHANE (15N, 98%+), 1 G, 23717-53-5
Medchemexpress LLC Tridecanoic acid-d2 | 64118-44-1 | MFCD00053328 | 25mg
Tridecanoic acid-d2 is the deuterium labeled Tridecanoic acid Tridecanoic acid (N-Tridecanoic acid) a 13-carbon medium-chain saturated fatty acid can serve as an antipersister and antibiofilm agent that may be applied to research bacterial infections Tridecanoic acid inhibits Escherichia coli persistence and biofilm formation[1]
![Revvity Health Sciences Inc Flunitrazepam, [Methyl-<sup>3</sup>H]-, 250µCi (9.25MBq)](https://assets.fishersci.com/TFS-Assets/CCG/product-images/VN00001872-509051032.JPG-250.jpg)
Revvity Health Sciences Inc Flunitrazepam, [Methyl-3H]-, 250µCi (9.25MBq)
Flunitrazepam, [Methyl-3H]-, 250µCi (9.25MBq)
Medchemexpress LLC Octadecanoic-1-13C acid | 85541-42-0 | 99.87% | 250 MG
Stearic acid-1-13C is the 13C labeled Stearic acid, a long chain dietary saturated fatty acid found in many animal and vegetable fats and oils. This compound is used as a tracer and internal standard for quantitative analysis. Stable heavy isotopes have been incorporated into drug molecules for quantitation during drug development, with the potential to affect pharmacokinetic and metabolic profiles.
- Used as a tracer
- Used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
Medchemexpress LLC Acetamide, N-[4-(ethoxy-d5)phenyl]- | 69323-74-6 | 99.5% | 50 MG
Phenacetin-d5 is a deuterium-labeled form of Phenacetin, a non-opioid analgesic and antipyretic agent. It functions as a selective COX-3 inhibitor and is utilized as a probe for cytochrome P450 enzymes CYP1A2 in human liver microsomes and in rats.
- Deuterium-labeled Phenacetin
- Non-opioid analgesic and antipyretic
- Selective COX-3 inhibitor
- Used as a probe for cytochrome P450 enzymes CYP1A2
Medchemexpress LLC Mequinol-d4 (4-methoxyphenol-d4) | 126840-02-6 | 128.16 | C7H4D4O2 | 10 MG
Mequinol-d4 is the d4 isotopologue of 4-methoxyphenol supplied as a 10 mg powder for research use. It is intended as a stable isotope reference standard and analytical reagent for tracer studies, method development, and mass spectrometry applications. For research use only; not for human or clinical use.
- Deuterium-labeled reference standard for analytical applications.
- Suitable as an internal standard for mass spectrometry and tracer studies.
- Supplied as a 10 mg powder for laboratory use.
- Molecular weight 128.16; chemical formula C7H4D4O2.
- Recommended storage: powder -20°C; in solvent -80°C (6 months) or -20°C (1 month).
Medchemexpress LLC (±)-Equol-d4 | 1216469-13-4 | MFCD34567407 | 99.9% | 246.29 g/mol | C15H10D4O3 | 5 MG
(±)-Equol-d4 is a deuterium-labeled analogue of (±)-equol supplied for research use as a stable isotope tracer and internal standard in quantitative and analytical assays. The compound is characterized by high isotopic and chemical purity and is provided in small lab-friendly pack sizes for analytical workflows.
- Deuterium-labeled internal standard for mass spectrometry and tracer studies.
- High purity (99.93%) suitable for analytical quantitation.
- Molecular formula C15H10D4O3; molecular weight 246.29 g/mol.
- Available in small pack sizes convenient for analytical workflows.
- Soluble in common organic solvents such as DMSO for sample preparation.
- Intended for research use only; not for human therapeutic use.
Medchemexpress LLC Decanoic acid-d19 | 88170-22-3 | 98.4% | 191.38 | C10HD19O2 | 10 MG
Decanoic acid-d19 is the deuterium-labeled analogue of decanoic (capric) acid provided as a stable-isotope reagent for analytical and metabolic studies. It preserves the fatty acid backbone while incorporating 19 deuterium atoms, allowing clear mass and NMR separation from unlabeled material. Typical purity is 98.4% and the formula is C10HD19O2.
- Deuterium-labeled (d19) fatty acid for isotope tracing.
- High purity suitable for analytical applications (98.4%).
- Useful as an internal standard for GC-MS and LC-MS quantitation.
- Compatible with NMR and metabolic labeling studies.
- Available in multiple small package sizes for research use.
- COA and SDS available to support quality and handling.
Medchemexpress LLC Fumaric acid-d2 | 24461-32-3 | MFCD00144378 | 99.0% | 118.08 g/mol | C4H2D2O4 | 25 MG
Fumaric acid-d2 is the deuterium-labeled analog of fumaric acid used as a stable isotope standard and research reagent. It is supplied as a white to off-white solid with 99.0% purity and is intended for analytical, metabolic, and tracer studies. For research use only.
- Deuterium-labeled compound for tracer and analytical applications.
- High purity (99.0%) suitable for reference standards.
- Soluble in DMSO (≥ 100 mg/mL) for convenient stock preparation.
- Stable when stored as a powder at -20°C for long-term storage.
- Available in small mass sizes for analytical workflows.
Medchemexpress LLC Methanol-d1 | 1455-13-6 | MFCD00044213 | >99.0% | 33.048 g/mol | CH3OD | 25 G
Methanol-d1 (CH3OD) is a deuterium-labeled methanol used as a deuterated solvent, tracer, and internal standard in analytical chemistry and spectroscopic applications. It offers high isotopic purity for NMR, mass spectrometry, and tracer studies, and is supplied with safety documentation for handling and storage.
- Deuterium-labeled methanol (CH3OD).
- CAS number 1455-13-6.
- High isotopic purity (≥99.0%).
- Suitable as an NMR solvent and internal standard.
- Useful as a tracer in isotopic labeling and analytical workflows.
- Provided with an SDS for safe handling and transport.
Medchemexpress LLC Guanfacine-13C,15N3 | 1189924-28-4 | 250.07 | 1 MG
Guanfacine-13C,15N3 is the 13C and 15N labeled version of Guanfacine. Guanfacine is an orally active noradrenergic α2A agonist that selectively targets the α2A receptor subtype. It has been observed to cause hypotension and sedation. This compound is used in research related to various prefrontal cortex (PFC) cognitive disorders, such as Tourette's syndrome and attention deficit hyperactivity disorder (ADHD). The incorporation of stable heavy isotopes into drug molecules, like in Guanfacine-13C,15N3, is primarily for quantitation during drug development, with deuteration specifically noted for its potential impact on 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
Cambridge Isotope Laboratories TAUROCHENODEOXYCHOLIC ACID, SODIUM SALT (2,2,4,4-D4, 98%) CHEMICAL PURITY 97%, 10 MG
TAUROCHENODEOXYCHOLIC ACID, SODIUM SALT (2,2,4,4-D4, 98%) CHEMICAL PURITY 97%, 10 MG