Isotopically Labeled Compounds
Medchemexpress LLC Sinapyl alcohol-d3 1mg
Sinapyl alcohol-d3 is the deuterated labeled Sinapyl alcohol (HY-W109812) Sinapyl alcohol is an orally active anti-inflammatory and antinociceptive agent Sinapyl alcohol reduces the expression level of inducible NO synthase and COX-2[1]
Cayman Chemical Cytosine-d2, Purity: ≥99% deuterated forms (d1-d2), CAS: 106391-24-6, 10 mg
An internal standard for the quantification of cytosine by GC- or LC-MS
Cambridge Isotope Laboratories Di-n-butyl phosphate (D18 97%) 100 ug/mL in acetonitrile 1 2 mL
Di-n-butyl phosphate (D18 97%) 100 ug/mL in acetonitrile 1 2 mL
Medchemexpress LLC Niacin-d4 | 66148-15-0 | 99.7% | 5 MG
Niacin-d4 is the deuterium labeled Niacin, a vitamin and part of the vitamin B group. It is intended for research use only.
- Used as a tracer
- Used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
Medchemexpress LLC 4-amino-exatecan-d5 | 00-00-0 | 98.6% | C23H16D5N3O4 | 10MG
(4-NH2)-Exatecan-d5 is the deuterium-labeled form of (4-amino) exatecan, a topoisomerase inhibitor derivative of exatecan intended for research use. It is commonly used as a building block in antibody-drug conjugate synthesis and as a labeled tracer or internal standard for quantitative analytical methods.
- Deuterium-labeled analog for analytical studies.
- Suitable for synthesis of antibody-drug conjugates.
- Usable as tracer or internal standard for NMR, GC-MS, and LC-MS.
- High purity (98.6%) for reproducible results.
- Molecular formula C23H16D5N3O4; molecular weight 408.46.
Medchemexpress LLC Urea-13C,15N2 | 58069-83-3 | 99.9% | 63.03 | 5 MG
Urea-13C,15N2 is the 13C and 15N labeled Urea, which functions as a powerful protein denaturant through direct and indirect mechanisms. It also acts as a potent emollient and keratolytic agent, and is utilized as a diuretic. It is widely applied in fertilizers as a nitrogen source and serves as an important raw material for the chemical industry. Blood urea nitrogen (BUN) is used to evaluate renal function.
- 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.
Cambridge Isotope Laboratories VITAMIN B3 (NICOTINIC ACID) (D4, 98%), 5 MG, 66148-15-0
VITAMIN B3 (NICOTINIC ACID) (D4, 98%), 5 MG, 66148-15-0
Medchemexpress LLC Calcifediol-d6 monohydrate (25-hydroxy Vitamin D3-d6 monohydrate) | 2483831-70-3 | 97.5% | 424.69 | 1 MG
Calcifediol-d6 monohydrate is a deuterium-labeled version of Calcifediol monohydrate. Calcifediol monohydrate (25-hydroxy Vitamin D3 monohydrate) acts as an effective VDR ligand and a Vitamin D supplement. It functions as a prohormone within the vitamin D endocrine system (VDES) and undergoes hydroxylation in the liver to form calcitriol, its active counterpart. Calcifediol is known for its ability to rapidly elevate serum Vitamin D levels.
- Can be used as a tracer in research.
- Serves as an internal standard for quantitative analysis using techniques such as NMR, GC-MS, or LC-MS.
- Deuterium labeling is valuable for quantitation during drug development and can influence pharmacokinetic and metabolic profiles.
Medchemexpress LLC Sofosbuvir-d6 | 1868135-06-1 | 98.07% | 535.49 | 2 MG
Sofosbuvir-d6 is the deuterium-labeled Sofosbuvir, an active inhibitor of HCV RNA replication. It demonstrates potent anti-hepatitis C virus (HCV) activity and is intended for research use only.
- Used as a tracer
- Functions as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS
- Stable heavy isotopes incorporated for drug development
- Potential to affect pharmacokinetic and metabolic profiles of drugs
![Revvity Health Sciences Inc Oleic Acid, [1-<sup>14</sup>C]-, 50µCi (1.85MBq)](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502810386.jpg-250.jpg)
Revvity Health Sciences Inc Oleic Acid, [1-14C]-, 50µCi (1.85MBq)
Oleic Acid, [1-14C]-, 50µCi (1.85MBq)
Medchemexpress LLC 1-methylinosine-d3 | 00-00-0 | >98.0% | 285.27 g/mol | C11H11D3N4O5 | 5 MG
1-Methylinosine-d3 is the deuterium-labeled isotopologue of 1-methylinosine, a modified nucleoside located at position 37 (3' to the anticodon) of eukaryotic tRNA. Supplied as a stable isotope standard for analytical and research applications, it is provided in small milligram quantities and characterized for high purity.
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 Umifenovir-d6 (hydrochloride) | 2928218-29-3 | 519.91 | 500 UG
Umifenovir-d6 (hydrochloride) is a deuterated form of Umifenovir hydrochloride, primarily used as a laboratory chemical and in the manufacture of substances. It is stable under recommended storage conditions.
- Solid appearance
- Stable under recommended storage conditions
- Recommended storage at -20°C, sealed, and away from moisture
- For research use only
Medchemexpress LLC Ethephon-d4 | 1020719-29-2 | >98.0% | 148.52 g/mol | C2H2D4ClO3P | 10 MG
Ethephon-d4 is the deuterium-labeled analogue of ethephon intended for analytical and research use. It functions as a tracer and internal standard for quantitative methods and is suitable for NMR, GC-MS, and LC-MS applications.
- Deuterium-labeled internal standard suitable for quantitative analysis.
- High deuterium enrichment (≈99 atom % D) with chemical purity ≥98%.
- Compatible with NMR, GC-MS, and LC-MS workflows.
- Stable when stored sealed at 4°C; in solution: -80°C (up to 6 months) or -20°C (≈1 month).
- Supplied in small calibrated quantities for analytical use.