Impurities & Reference Standards

Impurities & Reference Standards collects environmental contaminants, industrial chemicals and drug stereoisomers. Many entries are substances monitored in environmental and food analysis, such as the plasticizer dimethyl phthalate and the polycyclic aromatic hydrocarbon fluorene. Flame retardants are represented by the organophosphate triphenyl phosphate and by brominated compounds. Perfluorodecanoic acid belongs to the per- and polyfluoroalkyl substances (PFAS), a class known for persistence in the environment. A second group holds enantiomers and isomers of research compounds, such as (R)-Asundexian, the (R)-enantiomer of the factor XIa inhibitor asundexian. Such isomers support stereochemical comparison and the development of chromatographic separation methods. Process-related and degradation compounds of individual drugs are listed separately under Drug Impurity.

8 Items

  • 25I-NBOMe 4-methoxy isomer hydrochloride
    Cat. No.
    A29367

    25I-NBOMe 4-methoxy isomer hydrochloride

    25I-NBOMe 4-methoxy isomer hydrochloride is a potent agonist of the 5-HT2A receptor. It exhibits high affinity for both rat and human 5-HT2A receptors, with binding affinities (Ki values) of 0.087 nM and 0.044 nM, respectively. This compound is utilized in research exploring serotonergic mechanisms and their implications in neuropharmacology, particularly in studies related to psychotropic effects and receptor signaling pathways.

    1 mg
    $200.00
    5 mg
    $615.00
    All 3 sizes
  • Sopromidine
    Cat. No.
    A34199

    Sopromidine

    Sopromidine is a potent stereoselective isomer of the achiral H2-agonist Impromidine. It exhibits significant activity as a histamine H2 receptor agonist, influencing gastric acid secretion and various physiological processes. This reagent is primarily utilized in research focused on gastrointestinal physiology and pharmacology, facilitating studies on the modulation of histaminergic pathways.

    Out of stock

    All 3 sizes
  • (R,R)-Bexobrutideg
    Cat. No.
    A34465

    (R,R)-Bexobrutideg

    Synonyms: (R,R)-NX-5948; (R,R)-BTK-IN-24

    (R,R)-Bexobrutideg is the (R,R)-enantiomer of Bexobrutideg, acting as a potent PROTAC that facilitates the targeted degradation of Bruton's tyrosine kinase (BTK) via the cereblon E3 ligase (CRBN) complex. This compound demonstrates significant anti-inflammatory effects by inhibiting B cell activation and has shown efficacy in tumor growth suppression in TMD8 xenograft models exhibiting wild-type BTK and BTKi resistance mutations. Additionally, (R,R)-Bexobrutideg is effective in a mouse model of collagen-induced arthritis and possesses the ability to penetrate the blood-brain barrier, making it a valuable tool for research into autoimmune diseases and hematological cancers.

    5 mg
    $155.00
    10 mg
    $240.00
    All 5 sizes
  • (Rac)-EBET-1055
    Cat. No.
    A40304

    (Rac)-EBET-1055

    (Rac)-EBET-1055 is a racemic mixture of the PROTAC degrader EBET-1055, targeting bromodomain and extra-terminal (BET) proteins. This compound effectively inhibits the growth of pancreatic ductal adenocarcinoma (PDAC) while modulating the activity of cancer-associated fibroblasts (CAFs). Additionally, (Rac)-EBET-1055 enhances reporter gene activities in organoid co-cultures, making it a valuable tool for studying tumor microenvironment interactions and potential therapeutic strategies in cancer research.

    5 mg
    $305.00
    10 mg
    $475.00
    All 5 sizes
  • (Rac)-Upacicalcet
    Cat. No.
    A59491

    (Rac)-Upacicalcet

    Synonyms: (Rac)-SK-1403 free acid; (Rac)-AJT240 free acid; (Rac)-PLS240 free acid

    (Rac)-Upacicalcet serves as a racemic compound of Upacicalcet, a non-peptide calcimimetic that functions as an agonist of the calcium-sensing receptor (CaSR) with an EC50 of 10.8 nM. This compound has been shown to effectively lower serum intact parathyroid hormone (iPTH) and calcium levels, thereby mitigating hypocalcemia and associated gastrointestinal issues. In research models of secondary hyperparathyroidism (SHPT) induced by adenine, (Rac)-Upacicalcet demonstrates potential in improving vascular calcification and alleviating bone disorders. Its inhibitory effects on cortical pore formation and bone fibrosis have been noted in studies involving chronic kidney disease (CKD) models, making it a valuable tool for investigating SHPT mechanisms.

    5 mg
    $715.00
    10 mg
    $1,175.00
    All 3 sizes
  • (1S,2S)-2-PCCA hydrochloride
    Cat. No.
    A60855

    (1S,2S)-2-PCCA hydrochloride

    (1S,2S)-2-PCCA hydrochloride is a diastereomer of 2-PCCA that serves as a selective GPR88 receptor agonist. This compound effectively inhibits GPR88-mediated cAMP production, demonstrating an EC50 of 116 nM in HEK293 cells. It is useful in research applications focused on GPR88-related signaling pathways and neurological studies.

    1 mg
    $60.00
    5 mg
    $160.00
    All 7 sizes
  • (Rac)-LRK-4189
    Cat. No.
    A77249

    (Rac)-LRK-4189

    (Rac)-LRK-4189 is the racemic mixture of the selective PIP4K2C PROTAC degrader LRK-4189. This compound demonstrates potent biological activity with a DC50 of less than 500 nM for PIP4K2C in MOLT-4 cells, promoting antitumor effects by inducing intrinsic cell death and activating interferon signaling pathways. (Rac)-LRK-4189 is applicable in research focused on immune-mediated tumor cell killing, particularly in studies involving microsatellite stable (MSS) colorectal carcinoma.

    5 mg
    $85.00
    10 mg
    $145.00
    All 5 sizes
  • rel-Boc-Hyp-OMe
    Cat. No.
    B19723

    rel-Boc-Hyp-OMe

    rel-Boc-Hyp-OMe is an isomer of Boc-Hyp-OMe, primarily serving as an experimental control in chemical research. It functions as a non-cleavable linker in the development of antibody-drug conjugates (ADCs), contributing to enhanced therapeutic efficacy. Additionally, it can be utilized as an alkyl chain-based linker in the synthesis of PROTACs for targeted protein degradation studies.

    1 g
    $60.00
    All 1 sizes

8 Items

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