Isotopically Labeled and Unlabeled Reference Standards

 

Custom Synthesis Services

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Our core business is in the small-scale (milligram to gram) synthesis of pharmaceutical active organic compounds for research purposes and use as Certified Analytical Reference Standards. If you can draw it, we can probably synthesize it (at a price of course, that covers our R&D efforts!).

Stable Isotope Labeled (SIL) and Unlabeled Reference Standards

We specialize in small-scale synthesis of:

- APIs
- Metabolites
- Impurities
- Analogues
- Intermediates



With decades of combined experience, we are experts in the synthesis of stable labeled APIs and metabolites. Our extensive experience allows us to place deuteriums in the most stable positions to limit exchange, which ensures the quality of your assay. In cases where deuterium labeling is not desirable, we happily rely on 13C or 15N.

We are a registered DEA lab for Schedules I to V controlled compounds.

 

We have a large number of Anaytical Reference Standards available in stock for delivery. Please view our catalog of high-purity compounds and sealed solutions or request a quote for those listed and for custom-synthesis of those that are not listed in our catalog.

 

Full-time Equivalent (FTE) service is also available for R&D efforts, custom-synthesis of comounds with limited or no literature precedent requiring synthesis method development, or for primarily research oriented projects.

 

Quality Matters

Are you buying poorly characterized and unsupported reference standards? You don't need to settle for TLC or single wavelength purity determination.

With our full chemical certification, you will never need to doubt the authenticity or purity of Chemtos reference standards. Every compound provided by Chemtos comes fully certified with UV Diode Array HPLC purity analysis, proton NMR analysis, LC/MS and all of the supporting data. All analytical work is done under GLP conditions. Concentrations of our single use reference standard solutions in fame sealed ampules are verified by Quantitative proton NMR in order to independently confirm the stated potency/concentration value. See a sample Certificate of Analysis.

Learn more about the Chemtos Difference

N-Pyrrolidino Protonitazene Citrate

High purity N-Pyrrolidino Protonitazene Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

N-Pyrrolidino Isotonitazene Citrate

High purity N-Pyrrolidino Isotonitazene Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

N-Pyrrolidino Etonitazene Citrate

High purity N-Pyrrolidino Etonitazene Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

N-Pyrrolidino Metonitazene Citrate

High purity N-Pyrrolidino Metonitazene Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

5-Methyl Etodesnitazene Citrate

High purity 5-Methyl Etodesnitazene Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

Metonitazene-d3 Citrate

High purity Metonitazene labeled d3 Citrate includes a comprehensive Certificate of Analysis and all supporting analytical data

Nafamostat-13C,15N2,d4 Hydrate

High purity Nafamostat labeled 13C,15N2,d4 Hydrate includes a comprehensive Certificate of Analysis and all supporting analytical data

4'-chloro-PVP HCl

High purity 4’-chloro-PVP HCl (4’-chloro-α-PVP, 4-Chloro-α-pyrrolidinovalerophenone, 4-Cl-α-PVP, 4-Cl-PVP) includes a comprehensive Certificate of Analysis and all supporting analytical data

N-Desmethyl Doxepin HCl 1mg/ml

High purity N-Desmethyl Doxepin HCl solution includes a comprehensive Certificate of Analysis and all supporting analytical data

2C-N HCl (2-(2,5-Dimethoxy-4-nitrophenyl)ethanamine HCl)

High purity 2C-N HCl (2-(2,5-Dimethoxy-4-nitrophenyl)ethanamine HCl) includes a comprehensive Certificate of Analysis and all supporting analytical data

alpha-PBP HCl 1mg/ml

High purity alpha-Pyrrolidinobutiophenone HCl (α-PBP HCl) solution includes a comprehensive Certificate of Analysis and all supporting analytical data

Propylparaben sulfate Labeled d4 ammonium salt

High purity Propylparaben sulfate Labeled d4 ammonium salt includes a comprehensive Certificate of Analysis and all supporting analytical data