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.

9 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
  • (6R)-FR054
    Cat. No.
    A31200

    (6R)-FR054

    (6R)-FR054 is a less active isomer of FR054, acting primarily as a modulator of biological pathways influenced by the parent compound. This reagent provides a valuable tool for comparative studies aimed at elucidating the mechanisms of action and specific contributions of the more active isomer. Researchers can utilize (6R)-FR054 in the development of experimental designs that require an understanding of molecular interactions and signaling processes.

    5 mg
    $25.00
    10 mg
    $35.00
    All 5 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
  • WAY-120744
    Cat. No.
    A40166

    WAY-120744

    WAY-120744 is a novel naphthalenyl 3H-1,2,3,5-oxathiadiazole 2-oxide that acts as a potent modulator of biological targets relevant to chemotherapeutic strategies. This compound demonstrates significant anti-cancer activity, making it suitable for applications in cancer research and drug development. Its unique structure permits exploration of mechanisms of action in various cellular contexts, providing valuable insights into the modulation of signaling pathways.

    25 mg
    $1,275.00
    All 1 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)-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
  • Chrysene
    Cat. No.
    A92742

    Chrysene

    Chrysene is a high molecular weight polycyclic aromatic hydrocarbon (PAH) recognized for its role as a carcinogenic inducer. This compound exhibits significant potential for inducing malignancies in various biological systems, making it a valuable tool for cancer research. Chrysene is commonly used in studies aimed at elucidating the mechanisms of carcinogenesis and understanding the effects of environmental pollutants on human health.

    500 mg
    $30.00
    All 1 sizes
  • 11alpha-Hydroxyprogesterone
    Cat. No.
    B21627

    11alpha-Hydroxyprogesterone

    11alpha-Hydroxyprogesterone is an isomer of 11beta-Hydroxyprogesterone, serving as a valuable experimental control in research. It exhibits biological activity as a modulator of steroid receptors and can be utilized to investigate the effects of glucocorticoids and mineralocorticoids in cellular systems. Its application includes studying the activation of human mineralocorticoid receptors and the inhibition of 11β-Hydroxysteroid dehydrogenase, facilitating a deeper understanding of steroid hormone signaling pathways.

    25 mg
    $40.00
    50 mg
    $65.00
    All 2 sizes

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