Isotopically Labeled Compounds

Revvity Health Sciences Inc AF-DX 384, [2,3-Dipropylamino-³H]-, 250µCi (9.25MBq)

AF-DX 384, [2,3-Dipropylamino-³H]-, 250µCi (9.25MBq)

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Medchemexpress LLC Ethyl palmitate-d31 (Ethyl hexadecanoate-d31) | 1215721-57-5 | 1 MG

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Ethyl palmitate-d31 is the deuterium-labeled form of Ethyl palmitate. Ethyl palmitate, a fatty acid ethyl ester (FAEE), shows a marked preference for the synthesis of ethyl palmitate and ethyl oleate over other FAEEs in human subjects after ethanol consumption. It is also used as a hair- and skin-conditioning agent. This product is for research use only and not sold to patients.

• Can be used as a tracer.
• Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
• Deuterium labeling can affect pharmacokinetic and metabolic profiles of drugs.
• Stable heavy isotopes are used as tracers for quantitation during drug development.

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Medchemexpress LLC Triphenylsulfonium-d5 chloride | 99.6% | 303.86 g·mol⁻¹ | C18H10D5ClS | 1 MG

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Triphenylsulfonium-d5 chloride is a deuterium-labeled reagent used as an isotope-labeled analogue of triphenylsulfonium chloride for analytical and research applications. Supplied as a white to off-white solid with reported high purity, it is commonly used as a tracer and internal standard in quantitative NMR, GC-MS, and LC-MS workflows.

• Deuterium-labeled internal standard for quantitative analysis.
• High reported purity (≈99.6%).
• Molecular formula C18H10D5ClS; molecular weight 303.86 g·mol⁻¹.
• Available in small pack sizes suitable for analytical use, e.g., 1 mg.
• White to off-white solid with documented analytical data (HNMR, RP-HPLC, MS, COA).
• Recommended storage: 4°C sealed, protect from moisture; in solution store at -80°C for long-term stability.
• Intended for research use only; not for human or animal therapeutic use.

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Medchemexpress LLC Antipyrine-d3 | 65566-62-3 | MFCD01074188 | 99.9% | 191.24 g/mol | C11H9D3N2O | 10 MG

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Antipyrine-d3 is the deuterium-labeled internal standard of antipyrine supplied as a powder for analytical and pharmacokinetic studies. It is designed for isotope-dilution mass spectrometry and ADME/metabolic probe assays, providing a reliable tracer for quantitative LC-MS workflows.

• Deuterium-labeled internal standard for antipyrine.
• Supplied as a powder suitable for analytical use.
• High purity (~99.9%) appropriate for LC-MS quantification.
• Stable when stored as a powder: -20°C (up to 3 years) or 4°C (up to 2 years).
• Molecular formula C11H9D3N2O; molecular weight 191.24 g/mol.
• Common applications: isotope-dilution assays, pharmacokinetic studies, and metabolic profiling.

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Medchemexpress LLC 7-hydroxywarfarin-d5 | 94820-65-2 | 98.1% | 329.36 g/mol | C19H11D5O5 | 5 MG

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7-Hydroxywarfarin-d5 is a deuterium-labeled isotopologue of 7-hydroxywarfarin provided for research applications as an analytical reference and internal standard. It is supplied as a white to off-white solid with specified purity and recommended storage conditions for long-term stability. Use is restricted to laboratory research and analytical workflows.

• Deuterium-labeled internal standard for mass spectrometry and quantitative assays.
• High purity suitable for analytical applications.
• Available in small mg quantities for method development and validation.
• Soluble in DMSO at high concentration; ultrasonic agitation recommended.
• Store sealed at -20°C; stock solutions stable at -80°C for up to 6 months.

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Sigma Aldrich Fine Chemicals Biosciences Hydrocortisone-9,11,12,12-d4 >=98 atom % D, >=98% (CP) | 73565-87-4 | MFCD10567120 | 10MG

Hydrocortisone-9,11,12,12-d4 >=98 atom % D, >=98% (CP) | Purity: >=98% (CP) | Mol Wt: 366.48 | 73565-87-4 | MFCD10567120 | 10MG

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Medchemexpress LLC 2-naphthol-d7 | 78832-54-9 | 95.0% | 151.22 | C10HD7O | 250mg

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2-Naphthol-d7 is the deuterium labeled 2-Naphthol[1] 2-Naphthol is a metabolite of naphthalene catalyzed by cytochrome P450 (CYP) isozymes (CYP 1A1 CYP 1A2 CYP 2A1 CYP 2E1 and CYP 2F2)[2]

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Medchemexpress LLC Puromycin-d3 | 98.2% | 10 MG

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Puromycin-d3 is a deuterium-labeled analogue of puromycin used as a labeled standard and tracer in biochemical research and mass spectrometry applications. The deuterated isotopologue enables accurate quantitation and tracking in proteomics and metabolism studies.

• Deuterium-labeled puromycin (d3) for use as an internal standard in mass spectrometry and tracer studies.
• Aminoglycoside antibiotic that inhibits protein synthesis, useful for translation and inhibitor assays.
• Molecular formula C22H26D3N7O5; molecular weight 474.53 g/mol.
• Purity 98.2% as supplied by the manufacturer.
• Supplied as a powder, typically in 10 mg vials; store at -20°C for long-term stability.

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Cayman Chemical Propoxur-d3 1mg

An internal standard for the quantification of propoxur by GC- or LC-MS

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Medchemexpress LLC Fluorene-d8 | 35782-21-9 | 174.27 | C13H2D8 | 10 G

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Fluorene-d8 is a deuterium-labeled isotopic standard of fluorene used as an analytical reference in research applications. It has molecular formula C13H2D8, CAS 35782-21-9, and molecular weight 174.27 g/mol. Supplied as a 10 g package; purity and storage instructions are provided in the certificate of analysis.

• Deuterium-labeled internal standard for analytical applications.
• Suitable for mass spectrometry and isotopic tracing experiments.
• Provided in a 10 g package for bulk analytical use.
• Intended for research use only; certificate of analysis contains purity and storage details.
• Compact solid form simplifies handling and long-term storage when stored per CoA guidance.

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American Radiolabeled Chemicals Inc L-AP4-3H 250UC

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L-AP4-3H 250uCi in ethanol:water (1:1), 1 mCi/ml, S.A. 30-60 Ci/mmol, M.W. 183.10, Shipped in Dry Ice, Exclusive, (L-(+)-2-Amino-4-phosphono-2,3-3H-butyric acid)

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Cayman Chemical Losartn-d4 500ug

An internal standard for the quantification of losartan (potassium salt) by GC- or LC-MS

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American Radiolabeled Chemicals Inc OLEOYL-1-14C COA 50UC

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Oleoyl-1-14C Coenzyme A 50uCi in 0.01M Na acetate (pH 5.2):ethanol (1:1) under argon, 0.1 mCi/ml, S.A. 40-60 mCi/mmol, M.W. 1032.1, Shipped in Dry Ice

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Revvity Health Sciences Inc Bombesin, [¹²⁵I]Tyr⁴-, 50µCi (1.85MBq)

Bombesin, [¹²⁵I]Tyr⁴-, 50µCi (1.85MBq)

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Revvity Health Sciences Inc L-[4,5-³H(N)]-Leucine, 5mCi (185MBq)

L-[4,5-³H(N)]-Leucine, 5mCi (185MBq)

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