Isotopically Labeled Compounds
Medchemexpress LLC Valproic acid-d15 | 362049-65-8 | 99.8% | 159.30 g·mol⁻¹ | C8HD15O2 | 10 MG
Valproic acid-d15 is the deuterium-labeled stable isotope of valproic acid provided as a high-purity analytical standard for mass spectrometry, isotope-dilution quantification, and pharmacokinetic or metabolic tracer studies. It offers consistent isotopic labeling for accurate internal standard performance.
- Deuterium-labeled (d15) analog for isotope-dilution assays.
- Purity 99.8% for reliable analytical results.
- Suitable as an internal standard for LC-MS/MS workflows.
- Useful for tracer studies and pharmacokinetic/metabolic research.
- Available in small, pre-weighed quantities for method development.
Cambridge Isotope Laboratories Monoisobutyl phthalate (unlabeled) 100 ug/mL in MTBE 1 2 mL
Monoisobutyl phthalate (unlabeled) 100 ug/mL in MTBE 1 2 mL
Cambridge Isotope Laboratories GLYCINE (1-13C, 99%; 15N, 98%+), 1 G, 112898-03-0
GLYCINE (1-13C, 99%; 15N, 98%+), 1 G, 112898-03-0
Cambridge Isotope Laboratories TOXOFLAVIN (3,4A,5,8A-13C4, 98%) CP 95%, 1 MG
TOXOFLAVIN (3,4A,5,8A-13C4, 98%) CP 95%, 1 MG
Cambridge Isotope Laboratories 3-PHENOXYBENZOIC ACID UNLABEL
5000168147 3-PHENOXYBENZOIC ACID UNLABEL
Medchemexpress LLC L-ornithine-d2 hydrochloride | 2483831-42-9 | 99.9% | 170.63 | C5H11D2ClN2O2 | 5 MG
L-ornithine-d2 hydrochloride is the deuterium-labeled form of L-ornithine supplied for research use as an internal standard or tracer in quantitative analyses. It is provided as a high-purity, white to off-white solid hydrochloride salt tailored for analytical workflows such as NMR, GC-MS, and LC-MS.
- Deuterium-labeled internal standard for quantitative analysis.
- High chemical purity (≈99.9%).
- Hydrochloride salt form, solid, white to off-white.
- Suitable for NMR, GC-MS, and LC-MS methods.
- Available in small milligram pack sizes for analytical use.
Medchemexpress LLC Hepes-d18 | 203805-87-2 | 99.89% | 50 MG
HEPES-d18 is the deuterium labeled version of HEPES. HEPES is a nonvolatile zwitterionic chemical buffering agent commonly used in cell culture. It is effective within a pH range of 6.8 to 8.2 and is also recognized as a potent inducer of lysosome biogenesis.
- Used as a tracer.
- Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
- Stable heavy isotope incorporated into drug molecules.
- Potential to affect pharmacokinetic and metabolic profiles of drugs through deuteration.
Medchemexpress LLC Guanosine 5'-diphosphate (disodium salt) | 7415-69-2 | MFCD00084665 | 98.2% | 487.16 | C10H13N5Na2O11P2 | 5 MG
Guanosine 5'-diphosphate disodium salt is a purine nucleoside diphosphate used in biochemical and cellular research to probe GTPase activity, modulate ATP-sensitive K+ channels, and investigate iron mobilization pathways. Provided as a white to off-white solid with high purity, it is suitable for analytical assays and biochemical studies when stored under recommended conditions.
- High purity suitable for analytical and biochemical assays.
- Solid form convenient for storage, weighing, and long-term use.
- Supports studies of GTPase kinetics and ATP-sensitive K+ channel modulation.
- Applicable for research on iron mobilization and hepcidin-ferroportin interactions.
- Stable under recommended storage: -20°C for solids; in solution, -80°C up to 6 months.
Cayman Chemical LeukotrIen B4-d4 100ug
An internal standard for the quantification of LTB4 by GC- or LC-MS.
Medchemexpress LLC Phenytoin-d10 | 65854-97-9 | MFCD00143404 | 99.5% | 262.33 g/mol | C15H2D10N2O2 | 10 MG
Deuterated phenytoin used as a stable-isotope internal standard and analytical reference for quantitative LC- or GC-MS assays. Supplied as a purified solid intended for research use only.
- Deuterated analog of phenytoin for use as an internal standard in LC- or GC-MS assays.
- High isotopic labeling to improve accuracy in quantitative analyses.
- Purity 99.5% as specified by the manufacturer.
- Molecular weight 262.33 g/mol and CAS number 65854-97-9.
- Provided as a 10 mg solid vial for laboratory use.
- For research use only; not for human or clinical applications.
Cambridge Isotope Laboratories STEARIC ACID (METHYL-D3, 98%), 0.25 G, 62163-39-7
STEARIC ACID (METHYL-D3, 98%), 0.25 G, 62163-39-7
Medchemexpress LLC Oxolinic acid-d5 | 1189890-98-9 | 98.0% | 1 MG
Oxolinic acid-d5 is the deuterium-labeled form of Oxolinic acid, an antibiotic effective against both Gram-negative and Gram-positive bacteria. It is used in research for acute and chronic urinary tract infections. This compound functions as a DNA/RNA synthesis inhibitor and a dopamine uptake inhibitor, stimulating locomotor effects in mice. It is intended for research use only.
- Can be used as a tracer
- Functions as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
- Effective against Gram-negative and Gram-positive bacteria
- Inhibits DNA/RNA synthesis
- Acts as a dopamine uptake inhibitor
- Stimulates locomotor effects in mice
Medchemexpress LLC DOTAP-d9 iodide | 00-00-0 | 100.0% | 799.05 | C42H71D9INO4 | 5 MG
DOTAP-d9 iodide is a deuterium-labeled cationic lipid (iodide salt) supplied as a solid for use as a stable isotope tracer or internal standard in quantitative NMR, GC-MS, and LC-MS analyses. It is provided in small research quantities with high stated purity and specified storage conditions.
- Deuterium-labeled analog suitable for tracer studies and isotopic tracing.
- Can be used as an internal standard for quantitative NMR, GC-MS, and LC-MS.
- High purity (99.97%) for analytical applications.
- Solid, white to off-white appearance for easy handling and identification.
- Molecular weight 799.05 and formula C42H71D9INO4 for accurate mass calculations.
- Recommended storage: -20 °C sealed; in solvent stability: -80 °C (6 months), -20 °C (1 month).
Medchemexpress LLC Bupivacaine-d9 | 474668-57-0 | MFCD11977968 | 99.0% | 1 MG
Bupivacaine-d9 is a deuterium-labeled Bupivacaine, functioning as an NMDA receptor inhibitor. It effectively blocks sodium, L-calcium, and potassium channels and can be utilized in chronic pain research.
- 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 7-keto-Deoxycholic acid | 911-40-0 | 99.7% | 406.56 | 1 ML
7-keto-Deoxycholic acid is a metabolite of bile acids, naturally found in *Clostridium absonum* and convertible by *Lactobacillus* and *Bifidobacterium*. It plays a role in the metabolism of cholic acid and its bioconversion rate increases with the presence of deoxycholic acid. This compound is for research use only.
- Metabolite of bile acids
- Convertible by *Lactobacillus* and *Bifidobacterium*
- Exhibits increased bioconversion rate with deoxycholic acid
- Suitable for research applications
- Solid storage at 4°C, protected from light
- Solution storage at -80°C for 6 months, or -20°C for 1 month, protected from light