Isotopically Labeled Compounds
Medchemexpress LLC Leucovorin-d4 (calcium hydrate) | >90.0% | 533.54 | C20H19D4CaN7O8 | 250 UG
Leucovorin-d4 (calcium hydrate) is a deuterium-labeled folinic acid supplied as the calcium hydrate salt for research and analytical applications. It is provided as a small research-grade standard (250 μg) with a listed purity of >90% and is not intended for human use.
- Deuterium-labeled folinic acid for use as an isotope standard.
- Calcium hydrate form suitable for analytical workflows.
- Purity >90.0% as specified by the supplier.
- Molecular formula C20H19D4CaN7O8 and molecular weight 533.54.
- Supplied in a 250 μg research pack for analytical or mass spectrometry applications.
- Not intended for human or clinical use; for research use only.
Cambridge Isotope Laboratories EN-1948-4 PCB Sampling Standard (13C12 99%) 100 ng/mL in nonane 1 2 mL
EN-1948-4 PCB Sampling Standard (13C12 99%) 100 ng/mL in nonane 1 2 mL
Medchemexpress LLC Nicotinic acid-d4 | 66148-15-0 | 99.2% | 127.13 g/mol | C6HD4NO2 | 10 MG
Niacin-d4 (nicotinic acid-d4) is a deuterium-labeled stable isotope of niacin (vitamin B3) supplied as a calibrated reference material for analytical and metabolic studies. It is formulated for use as an internal standard or tracer in mass spectrometry, quantitative assays, and isotope-tracing experiments, and is supplied with reported high purity and recommended storage conditions.
- High isotopic labeling for accurate mass spectrometry quantification.
- Reported high purity (≈99.2%) suitable for analytical reference use.
- Supplied in small measured quantities suitable for trace-level studies.
- Solid form recommended stored sealed, protected from moisture and light at 4°C; in solution, store frozen.
Medchemexpress LLC Isoproturon-d3 | 352438-80-3 | 99.8% | 209.30 | C12H15D3N2O | 10 MG
Isoproturon-d3 is the deuterium-labeled analogue of the phenylurea herbicide isoproturon, supplied as a stable isotope reference standard for analytical and research use. It is designed for use as an internal standard or tracer in quantitative analytical methods, particularly LC-MS, to support environmental fate, residue analysis, and metabolic studies. Supplied in a 10 mg vial with documentation for batch verification.
- Stable deuterium label for accurate quantification in mass spectrometry
- Suitable as an internal standard for environmental residue and metabolism studies
- High reported purity for trace-level analysis
- Provided with supporting documentation such as COA and chromatographic data
- Compact research-grade quantity compatible with routine analytical workflows
Cayman Chemical Sulfamethoxazole-d4, Purity: ≥99% deuterated forms (d1-d4); ≤1% d0, CAS: 1020719-86-1, 25 mg
An internal standard for the quantification of sulfamethoxazole by GC- or LC-MS
Medchemexpress LLC L-serine (13C3,15N,d3) | 1994299-33-0 | 99.6% | 112.08 g/mol | ¹³C₃H₄D₃¹⁵NO₃ | 10 MG
Isotopically labeled L-serine for use as a tracer or internal standard in mass spectrometry and metabolic studies. Supplied for research use, the compound contains 13C, 15N, and deuterium labels and is characterized by high chemical purity.
- Isotopically labeled amino acid (13C3, 15N, d3)
- Intended for tracer studies and internal standard use in MS
- Purity 99.6% (GC)
- Molecular weight 112.08 g/mol
- CAS number 1994299-33-0
- Provided as a small research quantity suitable for analytical use
![Revvity Health Sciences Inc Acetic Acid, Sodium Salt, [1,2-<sup>14</sup>C]-, 50µCi (1.85MBq)](https://assets.fishersci.com/TFS-Assets/CCG/product-images/502812387.jpg-250.jpg)
Revvity Health Sciences Inc Acetic Acid, Sodium Salt, [1,2-14C]-, 50µCi (1.85MBq)
Acetic Acid, Sodium Salt, [1,2-14C]-, 50µCi (1.85MBq)
Medchemexpress LLC ZLN005-d4 | 2410443-42-2 | 99.5% | 254.36 | 5 MG
ZLN005-d4 is a deuterium labeled form of ZLN005, which is a potent activator of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α). Deuterium substitution can impact the 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
Medchemexpress LLC L-Lysine-15N2 (hydrochloride) | 1217460-44-0 | 184.64 | 25 MG
L-Lysine-15N2 hydrochloride is the 15N-labeled L-Lysine hydrochloride. It is an essential amino acid for humans with various benefits including treating herpes, increasing calcium absorption, reducing diabetes-related illnesses and improving gut health.
- This compound can be used as a tracer.
- This compound can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
Cambridge Isotope Laboratories Aldicarb (unlabeled) 100 ug/mL in acetonitrile 1 2 mL
Aldicarb (unlabeled) 100 ug/mL in acetonitrile 1 2 mL
Medchemexpress LLC D-glucose-13C-1 | 84270-10-0 | 99.9% | 181.15 | C5(13C)H12O6 | 10 MG
D-Glucose-13C-1 is D-(+)-glucose labeled with 13C at the C-1 position and supplied as a high-purity isotopic tracer for metabolic and biochemical studies in preweighed laboratory quantities.
- 13C label at the C-1 position for tracing metabolic pathways.
- High isotopic and chemical purity (99.9%).
- Provided in small preweighed quantities suitable for analytical experiments.
- Molecular weight 181.15 and CAS number 84270-10-0 for unambiguous identification.
- Stable solid form for routine laboratory storage and handling.
Cambridge Isotope Laboratories L-PHENYLALANINE (1-13C, 99%), 1 G, 81201-86-7
L-PHENYLALANINE (1-13C, 99%), 1 G, 81201-86-7