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.

7 Items

  • (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
  • D-Isoleucine
    Cat. No.
    A65911

    D-Isoleucine

    Synonyms: (R)-Isoleucine

    D-Isoleucine is a selective competitive activator of the Asc-1 antiporter, exhibiting a Ki value of 0.98 mM. By binding to the Asc-1 protein on neuronal cell membranes, D-Isoleucine facilitates the release of D-serine and glycine, thereby enhancing NMDA receptor-dependent synaptic plasticity. This compound is relevant in the study of neurodegenerative diseases, including Alzheimer's disease and schizophrenia. Additionally, D-Isoleucine serves as a non-classical D-amino acid, disrupting bacterial peptidoglycan synthesis and inhibiting biofilm formation in Staphylococcus aureus, suggesting its potential utility in antibacterial research.

    25 mg
    $35.00
    50 mg
    $55.00
    All 6 sizes
  • (Rac)-Methylindazone
    Cat. No.
    A66546

    (Rac)-Methylindazone

    Synonyms: (Rac)-IAA-94

    (Rac)-Methylindazone is the racemic mixture of Methylindazone, a potent blocker of the CLIC1 ion channel. This compound exhibits significant biological activity in modulating chloride ion transport, making it a valuable tool in research focused on ion channel function and related physiological processes. Potential applications include studies in cellular signaling and the investigation of CLIC1's role in various pathophysiological conditions.

    25 mg
    $1,405.00
    50 mg
    $1,790.00
    All 3 sizes
  • (S,S)-Sinogliatin
    Cat. No.
    A74950

    (S,S)-Sinogliatin

    Synonyms: (S,S)-HMS-5552; (S,S)-RO-5305552

    (S,S)-Sinogliatin is the (S,S)-enantiomer of the glucokinase activator Sinogliatin, specifically targeting glucokinase to enhance its activity. This compound demonstrates significant potential in the modulation of glucose metabolism, making it a valuable tool for research applications related to type 2 diabetes. Its use can aid in investigating the therapeutic mechanisms underlying glucose homeostasis and pancreatic function.

    1 mg
    $180.00
    5 mg
    $560.00
    All 6 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

7 Items

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