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Isotope Standards

Compounds (solids, liquids, gasses) with well-defined isotopic compositions that act as the ultimate sources of accuracy in mass spectrometric measurements of isotope ratios.
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Keyword Search:
16 – 30 of 319 results
16

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000407646 IMIDACLOPRID 500MG

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17

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000407645 IMIDACLOPRID 10MM 1ML

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18

Apexbio Technology LLC Imidacloprid 138261-41-3 200mg
SDP

Imidacloprid is a small-molecule modulator targeting nicotinic acetylcholine receptors (nAChRs) in insect nervous systems It is designed to selectively bind to nAChRs thereby disrupting cholinergic neurotransmission and neuronal signaling Imidacloprid exerts its biological activity primarily through interference with normal synaptic transmission by binding to nAChRs and causing abnormal neuronal signaling Based on these pharmacological properties Imidacloprid holds research potential in investigating cholinergic neurotransmission pathways receptor-ligand interactions neuronal signaling dysfunction neurotoxicity mechanisms and insecticide resistance It is also used as a comparative or reference molecule when characterizing the pharmacological or neurotoxicological profiles of candidate neuroactive compounds and insecticidal agents

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19

Cayman Chemical Leukotriene E4 methyl ester
SDP

A more lipid soluble formulation of LTE4

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20

Medchemexpress LLC MEDCHEMEXPRESS LLC

5000408332 TETRABENAZINE-D6 50MG

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21

Chemscene CHEMSCENE
SDP

NC3926045 SODIUM BORODEUTERIDE-D4

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22

Medchemexpress LLC Enalaprilat-d5 | 349554-00-3 | 99.5% | 10 MG
SDP

Enalaprilat-d5 is a deuterium-labeled analogue of enalaprilat used as a reference standard in biochemical and pharmacokinetic research. It acts as an angiotensin-converting enzyme (ACE) inhibitor and is provided as a high-purity analytical standard for assay development and quantitation.

  • Deuterium-labeled internal standard for analytical assays.
  • High isotopic enrichment and 99.5% purity for reliable quantitation.
  • Suitable for LC-MS/MS method development and validation.
  • Available in small pack sizes (for example, 10 mg) for bench-scale work.
  • Supplied as a dry powder for convenient dissolution and storage.

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23

Cayman Chemical Leukotriene C4 methyl ester
SDP

A more lipid soluble formulation of LTE4

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24

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000439930 LEUKOTRIENE D4-D5 25UG

ENCOMPASS_PREFERRED
25

Medchemexpress LLC MEDCHEMEXPRESS LLC

5000409151 MEFENAMIC ACID-D4 1MG

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26

Sigma Aldrich Fine Chemicals Biosciences Phenol-d6 99 atom % D | 13127-88-3 | MFCD00002144 | 5G

Phenol-d6 99 atom % D | Purity: 99% (CP) | Mol Wt: 100.15 | 13127-88-3 | MFCD00002144 | 5G

ENCOMPASS
27

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000439649 5 S -HETE-D8 25UG

ENCOMPASS_PREFERRED
28

Medchemexpress LLC PARICALCITOL-D6 5MG
SDP

501873958 PARICALCITOL-D6 5MG

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29

eMolecules​ Medchem Express / Enzalutamide-d6 / 1mg / 791206465 / HY-70002S1 / / 1443331-94-9 / [null] / 470.480 / C21H16F4N4O2S

Medchem Express / Enzalutamide-d6 / 1mg / 791206465 / HY-70002S1 / / 1443331-94-9 / [null] / 470.480 / C21H16F4N4O2S

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30

Cayman Chemical VItamIn K3-d8 50mg
SDP

An internal standard for the quantification of vitamin K3 by GC- or LC-MS

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