Isotopically Labeled Compounds
Medchemexpress LLC Leucine-2,3,3,4,5,5,5,5',5',5'-d10 | 29909-01-1 | 98.0% | 25 MG
(±)-Leucine-d10 is a deuterium labeled isomer of Leucine. It is used as a chemosterilant and dietary additive, notably inhibiting the growth of Escherichia coli HfrH.
- Used as a tracer in various applications.
- Functions as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Stable heavy isotopes are incorporated for quantitation during drug development.
- Deuteration can affect the pharmacokinetic and metabolic profiles of drugs.
Medchemexpress LLC Cefepime-d8 sulfate | 131857-33-5 | 99.2% | C19H18D8N6O9S3 | 1 MG
Cefepime-d8 sulfate is a deuterium-labeled form of Cefepime sulfate, intended for research purposes. It is useful for understanding drug pharmacokinetics and metabolic profiles.
- 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 Oseltamivir-d3 phosphate | 2734919-89-0 | 413.42 | C16H28D3N2O8P | 5 MG
Oseltamivir-d3 Phosphate is the deuterium-labeled form of oseltamivir phosphate supplied for research use as a tracer and internal standard in quantitative analytical workflows such as NMR, GC-MS, and LC-MS. It is intended for scientific research and drug declaration purposes only and not for personal or clinical use.
- Deuterium-labeled internal standard for analytical assays.
- Suitable for NMR, GC-MS, and LC-MS quantitative analysis.
- Provided in small, analytical-scale quantities for method development and calibration.
- Product datasheet available for purity and product data details.
Medchemexpress LLC Salbutamol-d9 acetate (Albuterol-d9 acetate) | 1781417-68-2 | 99.5% | 1 MG
Salbutamol-d9 (Albuterol-d9) acetate is the deuterium-labeled form of Salbutamol, an orally active, short-acting β2-adrenergic receptor agonist. It promotes tumorigenesis in gastric cancer cells via the β2-AR/ERK/EMT pathway and can relax bronchial smooth muscle, used in studies of bronchospasm induced by asthma and chronic obstructive pulmonary disease. It is for research use only. This compound can be used as a tracer and as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Used as a tracer
- Functions as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
- Incorporates stable heavy isotopes into drug molecules for quantitation during drug development
- May affect pharmacokinetic and metabolic profiles of drugs through deuteration
Medchemexpress LLC 4-butylphenol-d5 | 1219795-04-6 | 98.3% | 155.25 g/mol | C10H9D5O | 5 MG
4-Butylphenol-d5 is the deuterium-labeled analogue of 4-butylphenol intended for use as a tracer and internal standard in quantitative analytical workflows such as NMR, GC-MS, and LC-MS.
- Deuterium-labeled internal standard for quantitative analysis.
- Suitable for NMR, GC-MS, and LC-MS applications.
- Molecular formula C10H9D5O.
- Molecular weight 155.25 g/mol.
- CAS number 1219795-04-6.
- Available in small-mass vials (1 mg, 5 mg, 10 mg).
- Typical purity reported ~98.3% by distributors.
Medchemexpress LLC 7-keto-Deoxycholic acid | 911-40-0 | 99.7% | 406.56 | 5 MG
7-keto-Deoxycholic acid is a metabolite of bile acids found in *Clostridium absonum*. It is also produced from *Lactobacillus* and *Bifidobacterium* under specific conditions. In vitro, its bioconversion rate increases with the addition of an equimolar concentration of deoxycholic acid. It is induced by deoxycholic acid and subsequently metabolized. For example, *E. lentum-like c-25* can convert cholic acid to deoxycholic acid and 7-keto-Deoxycholic acid under anaerobic incubation.
- Metabolite of bile acids.
- Can be converted from *Lactobacillus* and *Bifidobacterium*.
- Available in various quantities.
- High purity.
- Solid appearance, white to off-white color.
- Endogenous metabolite.
- Shipping at room temperature in continental US; storage at 4°C, protected from light.
- Soluble in DMSO.
Medchemexpress LLC Palmitic acid-d4 | 75736-49-1 | MFCD00209772 | 99.9% | 260.45 g/mol | C16H28D4O2 | 10 MG
Palmitic acid-d4 is the deuterium-labeled (d4) analogue of palmitic acid used as a tracer and internal standard for quantitative analyses. Supplied as a solid in small milligram pack sizes, it offers high isotopic and chemical purity for analytical workflows. Molecular formula C16H28D4O2; molecular weight 260.45 g/mol. Store sealed and protected from moisture and light; in solvent, keep at -80°C for long-term storage.
- Deuterium-labeled (d4) internal standard for quantitative analysis.
- High chemical purity (≈99.9%).
- Suitable for NMR, GC-MS, and LC-MS applications.
- Available in small milligram pack sizes, including 10 MG.
- Solid form that is stable when stored sealed and protected from moisture and light.
Sigma Aldrich Fine Chemicals Biosciences Ethanol-1-13C 99 atom % 13C | 14742-23-5 | MFCD00003560 | 1G
Ethanol-1-13C 99 atom % 13C | Purity: 99% (CP) | Mol Wt: 47.06 | 14742-23-5 | MFCD00003560 | 1G
Medchemexpress LLC Pregn-4-ene-3,20-dione-d9 | 15775-74-3 | MFCD01317491 | 99.7% | 323.52 | C21H21D9O2 | 10 MG
Progesterone-d9 is a deuterium-labeled analogue of the endogenous steroid hormone progesterone, provided as a solid for research use. It is intended for use as a tracer and internal standard in quantitative analytical methods and pharmacokinetic or metabolic studies.
- Deuterium-labeled tracer and internal standard for NMR, GC-MS, and LC-MS.
- Chemical formula C21H21D9O2.
- Molecular weight 323.52 g/mol.
- Supplier-listed purity ~99.7% (verify for critical use).
- Appearance: white to light yellow solid.
- Solubility: DMSO 50 mg/mL; may require sonication and warming.
- Storage: powder at -20°C; in solvent -80°C (6 months) or -20°C (1 month).
- Typical pack size: 10 mg.
Medchemexpress LLC 8-hydroxy-5-nitroquinoline-d4 | 4008-48-4 | MFCD00006791 | 194.18 | C9H2D4N2O3 | 10 MG
Nitroxoline-d4 (8-hydroxy-5-nitroquinoline-d4) is the deuterated isotopologue of nitroxoline provided as a reference standard for research and analytical applications. It is used as an internal standard in mass spectrometry and in studies of nitroxoline's antibiofilm and metal-chelating activity.
- Deuterated internal standard for analytical assays
- Suitable for mass spectrometry quantitation and method development
- Supports antibiofilm and antimicrobial research applications
- High isotopic labeling minimizes overlap with native analyte
- Molecular formula C9H2D4N2O3, molecular weight 194.18
Cambridge Isotope Laboratories DL-2-HYDROXYGLUTARIC ACID, DISODIUM SALT (13C5, 99%), 1 MG
DL-2-HYDROXYGLUTARIC ACID, DISODIUM SALT (13C5, 99%), 1 MG
Medchemexpress LLC Hexatriacontane-d74 | 16416-34-5 | MFCD00274270 | 99.0% | 581.43 g/mol | CD3(CD2)34CD3 | 50 MG
Hexatriacontane-d74 is the deuterium-labeled isotopologue of hexatriacontane (C36) supplied as a high-purity solid for use as an isotopic standard or tracer in analytical chemistry. It is designed for quantitative and qualitative mass-spectrometry applications where a clear mass shift and stable reference compound are required.
- High isotopic purity (99.0%).
- Deuterium-labeled C36 alkane for clear mass-shift separation.
- Solid form for stable storage and handling.
- Suitable as an internal standard in GC-MS and LC-MS workflows.
- Provided with certificate of analysis and safety data sheet for documentation.
- Useful for tracer studies and analytical method development.
Medchemexpress LLC D-(+)-Talose-13C-1 | 83379-36-6 | 99.0% | 181.15 g/mol | C5(13C)H12O6 | 5 MG
D-(+)-Talose-13C-1 is a stable 13C-labeled monosaccharide provided for analytical and biochemical research. It is intended for use as a tracer or internal standard in metabolic tracing and analytical workflows.
- Labeled with 13C at carbon 1 for isotope tracing.
- High purity: 99.0%.
- Suitable as a tracer and internal standard for mass spectrometry and NMR analyses.
- Supplied in small research quantities for analytical workflows.
- Molecular weight 181.15 g/mol; formula C5(13C)H12O6.
- CAS number 83379-36-6 for substance identification.
Medchemexpress LLC Thiamphenicol-d3-1 | 1217723-41-5 | 99.0% | 1 MG
Thiamphenicol-d3-1 is a deuterium-labeled form of Thiamphenicol, a methyl-sulfonyl derivative of Chloramphenicol. It acts as a broad-spectrum antimicrobial antibiotic by binding to the 50S ribosomal subunit, inhibiting protein synthesis and resulting in a bacteriostatic effect against Gram-negative, Gram-positive aerobic, and anaerobic bacteria. Deuteration can influence the pharmacokinetic and metabolic profiles of drugs, and stable heavy isotopes are incorporated for quantitation during drug development.
- Used as a tracer
- Functions as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
- Exhibits broad-spectrum antimicrobial activity
- Inhibits protein synthesis by binding to the 50S ribosomal subunit
- Effective against Gram-negative, Gram-positive aerobic, and anaerobic bacteria