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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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166 – 180 of 338 results
166

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000381690 IMIDACLOPRID-UREA 50MG

ENCOMPASS_PREFERRED
167

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000383107 IMIDACLOPRID-UREA 100MG

ENCOMPASS_PREFERRED
168

Apexbio Technology LLC APEXBIO TECHNOLOGY LLC
SDP

5000570233 DIETHYLSTILBESTROL-D4-10MG

ENCOMPASS_PREFERRED
169

Apexbio Technology LLC APEXBIO TECHNOLOGY LLC
SDP

5000570309 DOPAMINE-D4-HYDROCHLORIDE-10MG

ENCOMPASS_PREFERRED
170

Apexbio Technology LLC APEXBIO TECHNOLOGY LLC
SDP

5000570443 NAPHTHALENE-D8-100MG

ENCOMPASS_PREFERRED
171

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000586439 RABEPRAZOLE-D4 10MG

ENCOMPASS_PREFERRED
172

Medchemexpress LLC MEDCHEMEXPRESS LLC
SDP

5000596638 AURISTATIN E-D8 10MG

ENCOMPASS_PREFERRED
173

Cambridge Isotope Laboratories NITROBENZENE-D5 (D, 99%), 25 G, 4165-60-0

NITROBENZENE-D5 (D, 99%), 25 G, 4165-60-0

ENCOMPASS_PREFERRED
174

Cell Signaling Technology Phospho-PKC-delta (Thr505) (D8K4R) Rabbit mAb 20 ul
SDP

Phospho-PKC-delta (Thr505) (D8K4R) Rabbit mAb 20 ul

ENCOMPASS
175

Cell Signaling Technology Cleaved Caspase-9 (Asp315) (D8I9E) Rabbit mAb 20 ul
SDP

Cleaved Caspase-9 (Asp315) (D8I9E) Rabbit mAb 20 ul

ENCOMPASS
176

Avanti Polar Lipids C18 GLCCER-D5 PDWR 1MG
SDP

D-glucosyl-beta-1,1' N-stearoyl-D-erythro-sphingosine-d5

ENCOMPASS
177

Medchemexpress LLC 12-HETE-d8 | 2525175-25-9 | 98.0% | 328.52 | 25 UG
SDP

12-HETE-d8 is the deuterium labeled form of 12-HETE, a major metabolic product of arachidonic acid formed via 12-LOX catalysis. It inhibits cell apoptosis in a dose-dependent manner and promotes NF-κB activation and nuclear translocation through the integrin-linked kinase (ILK) pathway. This compound exhibits both anti-thrombotic and pro-thrombotic effects and acts as a neuromodulator.

  • Can be used as a tracer.
  • Can be used as an internal standard for quantitative analysis by NMR, GC-MS, or LC-MS.
  • Deuteration can affect the pharmacokinetic and metabolic profiles of drugs.

ENCOMPASS_PREFERRED
178

Medchemexpress LLC Leukotriene C4 | 72025-60-6 | ≥97.0% | 625.77 | 25 UG
SDP

Leukotriene C4 is an eicosanoid lipid mediator produced by immune cells during type 2 inflammation. It can mediate inflammation, allergy, bronchoconstriction, and vascular leakage. It is also the parent cysteinyl leukotriene, produced by the LTC4 synthase catalyzed conjugation of glutathione to LTA4. Leukotriene C4 is produced by neutrophils, macrophages, mast cells, and by transcellular metabolism in platelets. It is one of the constituents of slow-reacting substance of anaphylaxis (SRS-A) and exhibits potent smooth muscle contracting activity.

  • Endogenous metabolite
  • Inflammation mediator
  • Research use only
  • High purity
  • Multiple formulations
  • Storage stability

ENCOMPASS_PREFERRED
179

Medchemexpress LLC D4-abiraterone | 154229-21-7 | 99.9% | 347.50 | 50 MG
SDP

D4-abiraterone | 154229-21-7 | 99.9% | 347.50 | 50 MG

ENCOMPASS_PREFERRED
180

eMolecules​ Medchem Express / Enalaprilat-d5 / 1mg / 415688613 / HY-B0231AS / / 349554-00-3 / MFCD06656364 / 353.430 / C18H24N2O5

Medchem Express / Enalaprilat-d5 / 1mg / 415688613 / HY-B0231AS / / 349554-00-3 / MFCD06656364 / 353.430 / C18H24N2O5

ENCOMPASS_PREFERRED