Isotope Standards
Boron 11 Isotope Standard For ICP/MS, 10μg/mL in H20, SPEX CertiPrep™
CAS: 7440-42-8 Molecular Formula: B Molecular Weight (g/mol): 10.81 MDL Number: MFCD00134034 MFCD00151272 InChI Key: ZOXJGFHDIHLPTG-UHFFFAOYSA-N PubChem CID: 5462311 ChEBI: CHEBI:27560 IUPAC Name: boron SMILES: [B]
Lead 206 Isotope Standard For ICP/MS, SPEX CertiPrep™
CAS: 7439-92-1 Molecular Formula: Pb Molecular Weight (g/mol): 207.20 MDL Number: MFCD00134050 InChI Key: WABPQHHGFIMREM-UHFFFAOYSA-N PubChem CID: 5352425 ChEBI: CHEBI:27889 IUPAC Name: lead SMILES: [Pb]
Lithium 6 Isotope Standard For ICP/MS, SPEX CertiPrep™
CAS: 7439-93-2 Molecular Formula: Li Molecular Weight (g/mol): 6.94 MDL Number: MFCD00134051 InChI Key: WHXSMMKQMYFTQS-UHFFFAOYSA-N PubChem CID: 3028194 ChEBI: CHEBI:30145 IUPAC Name: lithium SMILES: [Li]
Medchemexpress LLC 21-desacetyldeflazacort-d5 | 13649-57-5 | 99.3% | 404.51 g/mol | C23H24D5NO5 | 5 MG
21-Desacetyldeflazacort-d5 is a deuterium-labeled analytical reference standard of 21-desacetyldeflazacort for research use. It is designed to support accurate quantification of the active metabolite in biological samples and to improve precision in method validation and pharmacokinetic studies.
- Deuterium-labeled isotopologue for mass-spectrometry assays.
- High purity (>99.3%) for analytical reliability.
- Molecular weight 404.51 g/mol, well characterized.
- Suitable as an internal standard for LC-MS/MS and PK studies.
- Available in small mg quantities for analytical workflows.
eMolecules 764661-24-7 | Medchem Express | NNK-d4 | 1mg | 784543856 | HY-126477S | MFCD01861565 | 211.257 | C10H13N3O2
Medchem Express | NNK-d4 | 1mg | 784543856 | HY-126477S | 764661-24-7 | MFCD01861565 | 211.257 | C10H13N3O2
Sigma Aldrich Fine Chemicals Biosciences Cocaethylene-D8 solution 1
An analog of benzoylecgonine cocaethylene is a metabolite of cocaine formed in the presence of ethanol. This stable-labeled internal standard is suitable for quantitation of cocaethylene levels in urine blood and saliva by LC/MS or GC/MS for urine drug testing clinical toxicology forensic analysis or isotope dilution methods.
Medchemexpress LLC Dc-lc3in-d5 | 2868312-73-4 | 98.6% | C19H22Cl2N2O3 | 10MG
DC-LC3in-D5 is a deuterated research compound that acts as an autophagy inhibitor by attenuating LC3B lipidation and disrupting LC3B interactions. It is provided as a solid for laboratory research and is characterized by high purity and defined storage recommendations.
Medchemexpress LLC Aminobenzenesulfonic auristatin E-d8 | 00-00-0 | MFCD34676922 | 98.0% | C37H56D8N6O8S | 10MG
Aminobenzenesulfonic auristatin E-d8 is a deuterium-labeled drug-linker reagent used in antibody-drug conjugate (ADC) research. It combines auristatin E with an aminobenzenesulfonic linker and is supplied as a solid for preclinical, analytical, and linker-optimization studies. It is intended for research use only.
- Deuterium-labeled version of auristatin E for tracer and stability studies.
- High purity (98.0%).
- Chemical formula: C37H56D8N6O8S.
- Molecular weight: 761.05.
- White to off-white solid appearance.
- Storage: 4°C, protect from light; in solvent: -80°C (6 months), -20°C (1 month).
- Supplied in milligram-scale quantities suitable for ADC development and analytical work.