Isotopically Labeled Compounds
Medchemexpress LLC Spermine-d20 | 71-44-3 | 98.5% | 222.46 g/mol | C10H6D20N4 | 1 MG
Spermine-d20 is a deuterium-labeled isotopologue of spermine used as a stable isotope tracer or internal standard for quantitative NMR, GC-MS, and LC-MS analyses. It provides a mass-shifted analog for accurate quantitation in analytical and tracer studies.
- Purity 98.47%.
- Molecular formula C10H6D20N4; molecular weight 222.46 g/mol.
- Used as a tracer or internal standard for NMR, GC-MS, and LC-MS quantitation.
- Appearance white to off-white solid.
- Storage: powder -20°C (3 years); in solution -80°C (6 months), -20°C (1 month).
- Typical analytical pack size available: 1 mg.
Medchemexpress LLC Deflazacort-d3
Deflazacort-d3 is a isotope of Deflazacort Deflazacort is an inactive proagent and is converted rapidly to the active metabolite 21-desacetyldeflazacort Deflazacort is used as an anti-inflammatory and immunosuppressant[1]
Cambridge Isotope Laboratories D-FRUCTOSE (2-13C, 99%), 0.25 G, 117013-19-1
D-FRUCTOSE (2-13C, 99%), 0.25 G, 117013-19-1
Medchemexpress LLC L-proline-2,5,5-d3 | 65807-22-9 | MFCD16039492 | 99.6% | 118.15 | C5H6D3NO2 | 50mg
L-Proline-d3 is the deuterium labeled L-Proline L-Proline is one of the twenty amino acids used in living organisms as the building blocks of proteins
Cayman Chemical EverolImus-d4 1mg
An internal standard for the quantificaiton of everolimus by GC- or LC-MS
![Medchemexpress LLC D-(+)-talose-13C-1 | 83379-36-6 | MFCD08459988 | 99.0% | 181.15 g/mol | C5[13C]H12O6 | 100 MG](https://assets.fishersci.com/TFS-Assets/CCG/product-images/5000283080.png-250.jpg)
Medchemexpress LLC D-(+)-talose-13C-1 | 83379-36-6 | MFCD08459988 | 99.0% | 181.15 g/mol | C5[13C]H12O6 | 100 MG
D-(+)-Talose-13C-1 is the 13C-labeled form of D-(+)-talose provided for research use as a white to off-white solid. It has a molecular weight of 181.15 g/mol and a reported purity of 99.0%. This material is intended for use as a tracer or internal standard in analytical and biochemical applications; consult storage and stability guidelines before use.
- Contains a single 13C isotopic label for tracer studies.
- High purity suitable for analytical standards and internal standard use.
- Solid, white to off-white appearance for easy handling.
- Molecular weight 181.15 g/mol; molecular formula C5[13C]H12O6.
- Powder storage: stable at -20°C for extended periods; in solvent stability is limited.
Medchemexpress LLC (S)-malic acid-d3 | 59652-74-3 | MFCD08705100 | 99.0% | 137.11 | C4H3D3O5 | 5mg
(S)-Malic acid-d3 is the deuterium labeled (S)-Malic acid (S)-Malic acid ((S)-2-Hydroxysuccinic acid) is a dicarboxylic acid in naturally occurring form contributes to the pleasantly sour taste of fruits and is used as a food additive[1][2]
Cambridge Isotope Laboratories METHANESULFONIC ACID-D4 (D, 97-98%), 5 G
METHANESULFONIC ACID-D4 (D, 97-98%), 5 G
Medchemexpress LLC Hexacosanoic acid-d4-1 | 1194984-85-4 | 98.0% | 400.71 g/mol | C26H48D4O2 | 5 MG
Hexacosanoic acid-d4-1 is a deuterium-labeled reference standard of hexacosanoic acid, a 26-carbon very-long-chain fatty acid. It is supplied for analytical and metabolic research as an isotopically labeled internal standard to support quantitative assays and method development. For research use only.
- Deuterium-labeled internal standard for quantitative analysis by GC- or LC-MS.
- High chemical purity: 98.0%.
- Molecular formula: C26H48D4O2.
- Available in small pack sizes suitable for analytical use (e.g., 5 MG).
- Supplied for research use only.
Medchemexpress LLC Docetaxel-d5 trihydrate | 812.91 | C43H48D5NO14 | 500 UG
Docetaxel-d5 is a deuterium-labeled analogue of docetaxel intended for use as an internal standard or tracer in analytical workflows, particularly LC-MS/MS assays. It is provided as the trihydrate form with formula C43H48D5NO14 and molecular weight 812.91, packaged in microgram-scale quantities for calibration and quantitation.
- Isotopically labeled (d5) analogue for use as an internal standard.
- Suitable for LC-MS/MS and other mass spectrometry assays.
- Provided as a trihydrate with defined molecular formula and molecular weight.
- Supplied in microgram-scale quantities for assay calibration.
- Intended for research use only; not for human or veterinary use.
Cambridge Isotope Laboratories L-METHIONINE (13C5, 99%; 15N, 99%), 0.05 G, 202468-47-1
L-METHIONINE (13C5, 99%; 15N, 99%), 0.05 G, 202468-47-1
American Radiolabeled Chemicals Inc BOMBESIN 125I 50UC
Bombesin, Tyr-125I 50uCi in buffered solution (pH 3.4), 1 mCi/ml, S.A. 2200 Ci/mmol, M.W. ~1794, Shipped in Dry Ice
Cambridge Isotope Laboratories Diethyl malonate (1 2 3-13C3 99%) 0 5 g
Diethyl malonate (1 2 3-13C3 99%) 0 5 g
Cambridge Isotope Laboratories L-LEUCINE-N-FMOC (1,2-13C2, 99%), 0.1 G
L-LEUCINE-N-FMOC (1,2-13C2, 99%), 0.1 G