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 (555):

Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-15142R
    Doxorubicin hydrochloride (Standard) 25316-40-9
    Doxorubicin hydrochloride (Standard) is the analytical standard of Doxorubicin hydrochloride. This product is intended for research and analytical applications. Doxorubicin (Hydroxydaunorubicin) hydrochloride, a cytotoxic anthracycline antibiotic, is an anti-cancer chemotherapy agent. Doxorubicin hydrochloride is a potent human DNA topoisomerase I and topoisomerase II inhibitor with IC50s of 0.8 μM and 2.67 μM, respectively. Doxorubicin hydrochloride reduces basal phosphorylation of AMPK and its downstream target acetyl-CoA carboxylase. Doxorubicin hydrochloride induces apoptosis and autophagy.
    Doxorubicin hydrochloride (Standard)
  • HY-14649R
    Retinoic acid (Standard) 302-79-4
    Retinoic acid (Standard) is the analytical standard of Retinoic acid. This product is intended for research and analytical applications. Retinoic acid is a metabolite of vitamin A that plays important roles in cell growth, differentiation, and organogenesis. Retinoic acid is a natural agonist of RAR nuclear receptors, with IC50s of 14 nM for RARα/β/γ. Retinoic acid bind to PPARβ/δ with Kd of 17 nM. Retinoic acid acts as an inhibitor of transcription factor Nrf2 through activation of retinoic acid receptor alpha.
    Retinoic acid (Standard)
  • HY-N0322R
    Cholesterol (Standard) 57-88-5
    Cholesterol (Standard) is the analytical standard of Cholesterol. This product is intended for research and analytical applications. Cholesterol is the major sterol in mammals. It is making up 20-25% of structural component of the plasma membrane. Plasma membranes are highly permeable to water but relatively impermeable to ions and protons. Cholesterol plays an important role in determining the fluidity and permeability characteristics of the membrane as well as the function of both the transporters and signaling proteins. Cholesterol is also an endogenous estrogen-related receptor α (ERRα) agonist.
    Cholesterol (Standard)
  • HY-N0504R
    Lovastatin (Standard) 75330-75-5
    Lovastatin (Standard) is the analytical standard of Lovastatin. This product is intended for research and analytical applications. Lovastatin is a cell-permeable HMG-CoA reductase inhibitor used to lower cholesterol.
    Lovastatin (Standard)
  • HY-B1511R
    Cyclic AMP (Standard) 60-92-4
    Cyclic AMP (Standard) is the analytical standard of Cyclic AMP. Cyclic AMP (Cyclic adenosine monophosphate), adenosine triphosphate derivative, is an intracellular signaling molecule responsible for directing cellular responses to extracellular signals. Cyclic AMP is an important second messenger in many biological processes.
    Cyclic AMP (Standard)
  • HY-100639R
    Roflumilast N-oxide (Standard) 292135-78-5
    Roflumilast N-oxide (Standard) is the analytical standard of Roflumilast N-oxide. This product is intended for research and analytical applications. Roflumilast N-oxide is a PDE type 4 inhibitor.
    Roflumilast N-oxide (Standard)
  • HY-B1398R
    Ampyrone (Standard) 83-07-8
    Ampyrone (4-Aminophenazone) (Standard) is the analytical standard of Ampyrone (HY-B1398). This product is intended for research and analytical applications. Ampyrone (4-Aminophenazone; 4-Aminoantipyrine) is a reversible and low-damage optical clearing agent and non-selective COX inhibitor based on UV absorption properties. Ampyrone can improve the optical transmittance of mouse skin and other tissues. Ampyrone can induce tissue refractive index matching by enhancing UV absorption, reduce light scattering, and achieve tissue transparency in vivo. Ampyrone reduces the synthesis of prostaglandin PGE2, thereby exerting anti-inflammatory, analgesic and antipyretic effects. Ampyrone inhibits DNA damage, cell apoptosis and immune cell phagocytosis induced by Doxorubicin (HY-15142A) and Cisplatin (HY-17394), etc., and participates in the regulation of toxicity in tumor chemotherapy.
    Ampyrone (Standard)
  • HY-107447R
    N-Deshydroxyethyl Dasatinib (Standard) 910297-51-7
    N-Deshydroxyethyl Dasatinib (Standard) is the analytical standard of N-Deshydroxyethyl Dasatinib. This product is intended for research and analytical applications. N-Deshydroxyethyl Dasatinib (N-Deshydroxyethyl BMS-354825) is a metabolite of Dasatinib, Dasatinib is a multi-kinase inhibitor that potently inhibits Bcr-Abl, Src family and platelet-derived growth factor receptor kinases. N-Deshydroxyethyl Dasatinib can be used in cancer and immune disease research[1][2].
    N-Deshydroxyethyl Dasatinib (Standard)
  • HY-B0228R
    Adenosine (Standard) 58-61-7
    Adenosine (Standard) is the analytical standard of Adenosine. This product is intended for research and analytical applications. Adenosine (Adenine riboside), a ubiquitous endogenous autacoid, acts through the enrollment of four G protein-coupled receptors: A1, A2A, A2B, and A3. Adenosine affects almost all aspects of cellular physiology, including neuronal activity, vascular function, platelet aggregation, and blood cell regulation.
    Adenosine (Standard)
  • HY-B0469R
    Medroxyprogesterone acetate (Standard) 71-58-9
    Medroxyprogesterone acetate (Standard) is the analytical standard of Medroxyprogesterone acetate. This product is intended for research and analytical applications. Medroxyprogesterone acetate is a widely used synthetic steroid by its interaction with progesterone, androgen and glucocorticoid receptors.
    Medroxyprogesterone acetate (Standard)
  • HY-N0067R
    γ-Aminobutyric acid (Standard) 56-12-2
    γ-Aminobutyric acid (Standard) is the analytical standard of γ-Aminobutyric acid. This product is intended for research and analytical applications. γ-Aminobutyric acid (4-Aminobutyric acid) is a major inhibitory neurotransmitter in the adult mammalian brain, binding to the ionotropic GABA receptors (GABAA receptors) and metabotropic receptors (GABAB receptors. γ-Aminobutyric acid shows calming effect by blocking specific signals of central nervous system.
    γ-Aminobutyric acid (Standard)
  • HY-Y0252R
    L-Proline (Standard) 147-85-3
    L-Proline (Standard) is the analytical standard of L-Proline. This product is intended for research and analytical applications. L-Proline is one of the twenty amino acids used in living organisms as the building blocks of proteins.
    L-Proline (Standard)
  • HY-W020044R
    DL-alpha-Tocopherol (Standard) 10191-41-0
    DL-alpha-Tocopherol (Standard) is the analytical standard of DL-alpha-Tocopherol. This product is intended for research and analytical applications. DL-alpha-Tocopherol is a synthetic vitamin E, with antioxidation effect. DL-alpha-Tocopherol protects human skin fibroblasts against the cytotoxic effect of UVB.
    DL-alpha-Tocopherol (Standard)
  • HY-17422R
    Acyclovir (Standard) 59277-89-3
    Acyclovir (Standard) is the analytical standard of Acyclovir. This product is intended for research and analytical applications. Acyclovir (Aciclovir) is a potent, orally active antiviral agent. Acyclovir has antiherpetic activity with IC50 values of 0.85 μM and 0.86 μM for HSV-1 and HSV-2, respectively. Acyclovir induces cell cycle perturbation and apoptosis. Acyclovir prevents bacterial infections during induction therapy for acute leukaemia.
    Acyclovir (Standard)
  • HY-B0167R
    Salicylic acid (Standard) 69-72-7
    Salicylic acid (Standard) is the analytical standard of Salicylic acid. This product is intended for research and analytical applications. Salicylic acid (2-Hydroxybenzoic acid) inhibits cyclo-oxygenase-2 (COX-2) activity independently of transcription factor (NF-κB) activation.
    Salicylic acid (Standard)
  • HY-B0246R
    Carbamazepine (Standard) 298-46-4
    Carbamazepine (Standard) is the analytical standard of Carbamazepine. This product is intended for research and analytical applications. Carbamazepine is an orally active pressure-sensitive sodium ion channel blocker with an IC50 of 131 μM. Carbamazepine blocks voltage gated Na+, Ca2+, and K+ channels, and is also a HDAC inhibitor (IC50: 2 μM). Carbamazepine is an anticonvulsant and can be used for research of epilepsy and neuropathic pain.
    Carbamazepine (Standard)
  • HY-N0473R
    L-Tyrosine (Standard) 60-18-4
    L-Tyrosine (Standard) is the analytical standard of L-Tyrosine. This product is intended for research and analytical applications. L-Tyrosine is a non-essential amino acid which can inhibit citrate synthase activity in the posterior cortex.
    L-Tyrosine (Standard)
  • HY-B0586R
    Methylcobalamin (Standard) 13422-55-4
    Methylcobalamin (Standard) is the analytical standard of Methylcobalamin. This product is intended for research and analytical applications. Methylcobalamin (CH3-B12), a cobalamin, is a form of vitamin B12.
    Methylcobalamin (Standard)
  • HY-90006R
    5-Fluorouracil (Standard) 51-21-8
    5-Fluorouracil (Standard) is the analytical standard of 5-Fluorouracil. This product is intended for research and analytical applications. 5-Fluorouracil (5-FU) is an analogue of uracil and a potent antitumor agent. 5-Fluorouracil affects pyrimidine synthesis by inhibiting thymidylate synthetase thus depleting intracellular dTTP pools. 5-Fluorouracil induces apoptosis and can be used as a chemical sensitizer. 5-Fluorouracil also inhibits HIV.
    5-Fluorouracil (Standard)
  • HY-Y0337R
    L-Cysteine (Standard) 52-90-4
    L-Cysteine (Standard) is the analytical standard of L-Cysteine. This product is intended for research and analytical applications. L-Cysteine is a conditionally essential amino acid, which acts as a precursor for biologically active molecules such as hydrogen sulphide (H2S), glutathione and taurine. L-Cysteine suppresses ghrelin and reduces appetite in rodents and humans.
    L-Cysteine (Standard)