2. Reference Standards
  3. Drug Testing Standards
  4. Pharmacuetical Impurity Standards

Pharmacuetical Impurity Standards

Any substance that affects the purity of a drug is collectively referred to as a drug impurity. Due to the fact that adverse reactions of drugs in clinical use are not only related to the pharmacological activity of the drug itself, but sometimes also to impurities present in the drug, the study of drug impurities is an important aspect of drug development.

Pharmacuetical Impurity Standards (25):

Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-B0113R
    Omeprazole (Standard) 73590-58-6 99.86%
    Omeprazole (Standard) is the analytical standard of Omeprazole. This product is intended for research and analytical applications. Omeprazole (H 16868), a proton pump inhibitor (PPI), is available for treatment of acid-related gastrointestinal disorders. Omeprazole shows competitive inhibition of CYP2C19 activity with a Ki of 2 to 6 μM. Omeprazole also inhibits growth of Gram-positive and Gram-negative bacteria.Omeprazole is a potent brain penetrant neutral sphingomyelinase (N-SMase) inhibitor (exosome inhibitor).
    Omeprazole (Standard)
  • HY-B0104R
    Glimepiride (Standard) 93479-97-1
    Glimepiride (Standard) is the analytical standard of Glimepiride. This product is intended for research and analytical applications. Glimepiride (Glimperide) is a medium-to-long acting sulfonylurea anti-diabetic compound with an ED50 of 182 μg/kg.
    Glimepiride (Standard)
  • HY-17376R
    Ezetimibe (Standard) 163222-33-1 99.90%
    Ezetimibe (Standard) is the analytical standard of Ezetimibe. This product is intended for research and analytical applications. Ezetimibe (SCH 58235) is a potent cholesterol absorption inhibitor. Ezetimibe is a Niemann-Pick C1-like1 (NPC1L1) inhibitor, and is a potent Nrf2 activator.
    Ezetimibe (Standard)
  • HY-10218R
    Everolimus (Standard) 159351-69-6
    Everolimus (Standard) is the analytical standard of Everolimus. This product is intended for research and analytical applications. Everolimus (RAD001) is a Rapamycin (HY-10219) derivative and a potent, selective and orally active mTOR1 inhibitor. Everolimus binds to FKBP-12 to generate an immunosuppressive complex. Everolimus inhibits tumor cells proliferation and induces cell apoptosis and autophagy. Everolimus has potent immunosuppressive and anticancer activities.
    Everolimus (Standard)
  • HY-70002R
    Enzalutamide (Standard) 915087-33-1
    Enzalutamide (Standard) is the analytical standard of Enzalutamide. This product is intended for research and analytical applications. Enzalutamide (MDV3100) is an androgen receptor (AR) antagonist with an IC50 of 36 nM in LNCaP prostate cells. Enzalutamide is an autophagy activator.
    Enzalutamide (Standard)
  • HY-16560R
    Camptothecin (Standard) 7689-03-4
    Camptothecin (Standard) (Campathecin (Standard)) is the analytical standard of Camptothecin (HY-16560). This product is intended for research and analytical applications. Camptothecin (CPT), a kind of alkaloid, is a DNA topoisomerase I (Topo I) inhibitor with an IC50 of 679 nM. Camptothecin (CPT) exhibits powerful antineoplastic activity against colorectal, breast, lung and ovarian cancers, modulates hypoxia-inducible factor-1α (HIF-1α) activity by changing microRNAs (miRNA) expression patterns in human cancer cells.
    Camptothecin (Standard)
  • HY-70002BR
    Enzalutamide carboxylic acid (Standard) 1242137-15-0
    Bromoxynil octanoate (Standard) is the analytical standard of Bromoxynil octanoate. This product is intended for research and analytical applications. Bromoxynil octanoate is an herbicide widely applied to maize, is potentially toxic to both animals and humans.
    Enzalutamide carboxylic acid (Standard)
  • HY-W008003R
    2-Hydroxybenzimidazole (Standard) 615-16-7
    2-Hydroxybenzimidazole (Standard) is the analytical standard of 2-Hydroxybenzimidazole. This product is intended for research and analytical applications. 2-Hydroxybenzimidazole is a biochemical reagent that can be used as a biological material or organic compound for life science related research.
    2-Hydroxybenzimidazole (Standard)
  • HY-B1923R
    Piperacillin (Standard) 61477-96-1
    Piperacillin (Standard) is the analytical standard of Piperacillin. This product is intended for research and analytical applications. Piperacillin is a semisynthetic broad-spectrum β-lactam antibiotic which exhibits potent bactericidal activity against Gram-negative bacteria as well as select Gram-positive strains through penicillin-binding proteins. Piperacillin is most commonly used in combination with the β-lactamase inhibitor Tazobactam.
    Piperacillin (Standard)
  • HY-10181BR
    Dasatinib monohydrate (Standard) 863127-77-9
    Dasatinib (monohydrate) (Standard) is the analytical standard of Dasatinib (monohydrate). This product is intended for research and analytical applications. Dasatinib (BMS-354825) monohydrate is a highly potent, ATP competitive, orally active dual Src/Bcr-Abl inhibitor with potent antitumor activity. The Kis are 16 pM and 30 pM for Src and Bcr-Abl, respectively. Dasatinib monohydrate inhibits Bcr-Abl and Src with IC50s of <1.0 nM and 0.5 nM, respectively. Dasatinib monohydrate also induces apoptosis and autophagy.
    Dasatinib monohydrate (Standard)
  • HY-10261AR
    Afatinib dimaleate (Standard) 850140-73-7
    Afatinib (dimaleate) (Standard) is the analytical standard of Afatinib (dimaleate). This product is intended for research and analytical applications. Afatinib (BIBW 2992) dimaleate is an orally active, potent and irreversible dual specificity inhibitor of ErbB family (EGFR and HER2), with IC50 values of 0.5 nM, 0.4 nM, 10 nM and 14 nM for EGFRwt, EGFRL858R, EGFRL858R/T790M and HER2, respectively. Afatinib dimaleate can be used for the research of esophageal squamous cell carcinoma (ESCC), non-small cell lung cancer (NSCLC) and gastric cancer.
    Afatinib dimaleate (Standard)
  • HY-13570CR
    Betamethasone disodium phosphate (Standard) 151-73-5
    Betamethasone disodium phosphate (Standard) is the analytical standard of Betamethasone disodium phosphate. This product is intended for research and analytical applications. Betamethasone disodium phosphate (Betamethasone 21-phosphate disodium salt) is a kind of corticosteroid, which is commonly used in the intralesional research of keloids.
    Betamethasone disodium phosphate (Standard)
  • HY-17355AR
    Dexpramipexole dihydrochloride (Standard) 104632-27-1
    Dexpramipexole (dihydrochloride) (Standard) is the analytical standard of Dexpramipexole (dihydrochloride). This product is intended for research and analytical applications. Dexpramipexole dihydrochloride ((R)-Pramipexole dihydrochloride) is a neuroprotective agent and weak non-ergoline dopamine agonist.
    Dexpramipexole dihydrochloride (Standard)
  • HY-40354AR
    Tofacitinib citrate (Standard) 540737-29-9
    Tofacitinib (citrate) (Standard) is the analytical standard of Tofacitinib (citrate). This product is intended for research and analytical applications. Tofacitinib citrate is an orally available JAK1/2/3 inhibitor with IC50s of 1, 20, and 112 nM, respectively. Tofacitinib citrate has antibacterial, antifungal and antiviral activities.
    Tofacitinib citrate (Standard)
  • HY-17021R
    Esomeprazole (Standard) 119141-88-7
    Esomeprazole (Standard) is the analytical standard of Esomeprazole. This product is intended for research and analytical applications. Esomeprazole ((S)-Omeprazole) is a potent and orally active proton pump inhibitor and reduces acid secretion through inhibition of the H+, K+-ATPase in gastric parietal cells. Esomeprazole has the potential for symptomatic gastroesophageal reflux disease research.
    Esomeprazole (Standard)
  • HY-70013R
    Abiraterone (Standard) 154229-19-3
    Abiraterone (Standard) is the analytical standard of Abiraterone. This product is intended for research and analytical applications. Abiraterone is a potent and irreversible CYP17A1 inhibitor with antiandrogen activity, which inhibits both the 17α-hydroxylase and 17,20-lyase activity of the cytochrome p450 enzyme CYP17 with IC50s of 2.5 nM and 15 nM, respectively.
    Abiraterone (Standard)
  • HY-17436R
    Clevidipine (Standard) 167221-71-8
    Clevidipine (Standard) is the analytical standard of Clevidipine. This product is intended for research and analytical applications. Clevidipine is a short-acting dihydropyridine calcium channel antagonist (IC50= 7.1 nM, V(H) = -40 mV ).
    Clevidipine (Standard)
  • HY-B1090R
    Cinnarizine (Standard) 298-57-7
    Cinnarizine (Standard) is the analytical standard of Cinnarizine. This product is intended for research and analytical applications.
    Cinnarizine (Standard)
  • HY-B0105R
    Ketoconazole (Standard) 65277-42-1
    Ketoconazole (Standard) is the analytical standard of Ketoconazole. This product is intended for research and analytical applications. Ketoconazole (R-41400) is an imidazole anti-fungal agent, a CYP3A4 and CYP24A1 inhibitor.
    Ketoconazole (Standard)
  • HY-A0034R
    Solifenacin (Standard) 242478-37-1
    Solifenacin (Standard) is the analytical standard of Solifenacin. This product is intended for research and analytical applications. Solifenacin (YM905 free base) is a novel muscarinic receptor antagonist with pKis of 7.6, 6.9 and 8.0 for M1, M2 and M3 receptors, respectively.
    Solifenacin (Standard)