We have recently started analysis and recertification of peptides using proton qNMR which provides general molecular structure confirmation and weight percent potency, including in lyophilized vials containing excipients.
Custom Synthesis
We specialize in the small-scale (milligram to gram) custom-synthesis of organic compounds as certified primary analytical reference standards. We are experts in the synthesis of stable labeled APIs and metabolites. Our extensive experience allows us to place deuteriums or 13C or 15N in the most stable positions to limit exchange, which ensures the quality of your assay.
We are a registered DEA facility for synthesis of controlled compounds, and hold Manufacturing license and quota for small scale synthesis of significant fraction of US DEA Scheduled products. At our clients' requests, we have recently synthesized a large number of nitazene variants and metabolites for use as reference standards. These are available as DEA Exempt solution products in flame sealed ampoules and most are priced at $199/1ml of 1mg/ml solution.
Catalog of Ref Stds
We carry a large number of Certified Analytical Reference Standards in-stock that are ready to ship within 1-3 business days. These are available neat, or as solution in flame sealed ampoules for some references standards. Prices are only displayed for customers that have website account and are logged in. Please contact
A number of these compounds required challenging synthesis, and had little or inadequate literature references. And, some do not have CAS numbers listed.
Each reference standard that we ship is accompanied by Certificate of Analysis and supporting analytical data. Potency is accurately determined using qNMR analysis.
Analytical Services
We offer full compound certification and recertification services, which includes a comprehensive Certificate of Analysis, along with all supporting documentation. Analytical techniques offered include UV HPLC, LC-MS, NMR, Karl Fischer titration for moisture content, Specific Optical rotation, Melting Point, and Combustion elemental analysis. All analytical work for such certification is carried out following GLP protocols.
In addition, we also offer basic analytical data only services at a low cost. This includes NMR services and LC-MS data. Lyophillized peptide analysis is also offered at relatively lower cost to assist in identification of bad and incorrect products being sold in this unregulated market - please contact us to learn more.
Distributors of Chemtos Products include:
SHENG SING INSTRUMENT CO., LTD.
No.24, Lane 37, Keelung Road Sec.1, Sinyi District, Taipei City 11069,TAIWAN R.O.C. Tel：+886-2-2769-0798 Fax：+886-2-2768-7941 Email:
