Technical & commercial enquiries: chao.lu@cato-chem.com Certificate of analysis issued per lot · Worldwide shipping
CATO Research Chemicals Inc. chao.lu@cato-chem.com
Home / Standards by type / Pharmacopoeial impurity standards

Pharmacopoeial impurity standards

Impurities named in a pharmacopoeial monograph, used to check that a chromatographic system resolves and quantifies the species the monograph lists. Pharmacopoeial designations are given for identification only and do not imply endorsement by those bodies.

134 items in this group. Every one has its own page with the CAS number, molecular data, available pack sizes and the documentation on file; the batch certificate of analysis states the value assigned to the lot you receive.

ProductCASCat. no.Status
Mupirocin EP Impurity A40980-51-6C4X-17061In stock
Glycyrrhizic Acid Impurity 172919137-39-4C4X-253717On synthesis
Finasteride EP Impurity B103335-41-7C4X-110311In stock
Glycyrrhizic Acid Impurity 19—C4X-253719On synthesis
Mirogabalin Impurity 641644251-71-7C4X-292464In stock
Formoterol EP Impurity F (Mixture of Diastereomers)1795129-59-7C4X-15256In stock
Imrecoxib Impurity 32305368-53-8C4X-23793On synthesis
Ubidecarenone Impurity 324663-35-2C4X-13763On synthesis
Moxidectin EP Impurity D—C4X-22751In stock
Avibactam Impurity 137—C4X-1348137On synthesis
Mirogabalin Impurity 106—C4X-2924106In stock
Sodium Fusidate EP Impurity B—C4X-11972In stock
Ubidecarenone Impurity 2(Coenzyme Q10)65085-29-2C4X-13762In stock
Bromocriptine EP Impurity B511-09-1C4X-13611In stock
Chlorhexidine EP Impurity J Formate—C4X-225627On synthesis
Clavulanate EP Impurity E1260617-10-4C4X-114611On synthesis
Amoroven EP impurity L TFA Salt—C4X-154222In stock
Chlorhexidine Impurity 24—C4X-225624On synthesis
Mirogabalin Impurity 631644251-70-6C4X-292463In stock
Moxidectin EP Impurity C114041-23-5C4X-227512On synthesis
Pimecrolimus Impurity 13—C4X-173113On synthesis
Tacrolimus EP Impurity B—C4X-130045On synthesis
Amphotericin B EP Impurity A1405-32-9C4X-184410On synthesis
Avibactam Impurity 136—C4X-1348136On synthesis
Ilaprazole Impurity 116—C4X-1130116On synthesis
Imrecoxib Impurity 8—C4X-23798On synthesis
Urapidil Impurity 20—C4X-192420On synthesis
Amphotericin B EP Impurity B136135-57-4C4X-18445In stock
Calcipotriol EP Impurity B2948288-30-8C4X-12222In stock
Ciclosporin EP Impurity D108027-45-8C4X-19982On synthesis
Dexamethasone EP Impurity K1809224-82-5C4X-116511In stock
Ertugliflozin impurity 35—C4X-301135In stock
Moxidectin EP Impurity A114041-32-6C4X-22757On synthesis
Olanzapine Impurity 81320360-87-9C4X-11788On synthesis
Tacrolimus EP Impurity G144490-63-1C4X-130019On synthesis
Chlorhexidine Impurity 52518301-34-1C4X-22565On synthesis
Colchicine Impurity 86877-25-4C4X-14118On synthesis
Cyclosporin V (Ciclosporin EP Impurity E)108027-46-9C4X-19983On synthesis
Fluocinolone Acetonide Impurity 17—C4X-238117In stock
Fluticasone Propionate EP Impurity K—C4X-165044In stock
Moxidectin EP Impurity F—C4X-227510On synthesis
Oseltamivir Impurity 472081110-44-1C4X-172047In stock
Pimecrolimus Impurity 3—C4X-17313On synthesis
Teprenone Impurity 24—C4X-208124On synthesis
Teprenone impurity 36—C4X-208136On synthesis
Ubidecarenone EP Impurity B303-95-7C4X-137617On synthesis
Ammonium Glycyrrhizate EP Impurity A—C4X-25373On synthesis
Calcitriol Impurity 1141461-13-6C4X-151011On synthesis
Dexamethasone Sodium Phosphate EP Impurity D—C4X-116528In stock
Finerenone Impurity 204—C4X-2880204On synthesis
Levonorgestrel EP Impurity O155683-60-6C4X-167715In stock
Olanzapine Impurity 91320360-86-8C4X-11789On synthesis
Teprenone Impurity 25—C4X-208125On synthesis
Cilastatin EP Impurity F—C4X-19604In stock
Dexamethasone Sodium Phosphate EP Impurity E—C4X-116529On synthesis
Dextromethorphan EP Impurity D1453167-99-1C4X-11574On synthesis
Imrecoxib Impurity 7—C4X-23797On synthesis
Iodixanol EP Impurity E255376-57-9C4X-16634On synthesis
Iodixanol EP Impurity G171897-72-6C4X-16632In stock
Ivermectin EP Impurity F—C4X-198213On synthesis
Miglitol Impurity C1550201-56-3C4X-16975On synthesis
Mometasone Furoate EP Impurity B223776-49-6C4X-17044In stock
Tadalafil EP Impurity F2747958-44-5C4X-10876In stock
Teprenone Impurity 26—C4X-208126On synthesis
Calcipotriol EP Impurity A126860-83-1C4X-12221In stock
Canagliflozin Impurity 132247196-28-5C4X-112313On synthesis
Finerenone Impurity 266—C4X-2880266In stock
Fluticasone Propionate EP Impurity J—C4X-165019On synthesis
Glycyrrhizic Acid Impurity 14105038-43-5C4X-253714In stock
Ivermectin EP Impurity K74567-01-4C4X-198211On synthesis
Pimecrolimus Impurity 7—C4X-17317On synthesis
Pinaverium Bromide Impurity 22—C4X-246722In stock
Pregabalin Impurity 62—C4X-131262On synthesis
Relebactam Impurity 34—C4X-214434On synthesis
Rifaximin EP Impurity H1210022-90-4CP107013On synthesis
Salbutamol Impurity P TFA—C4X-1176206On synthesis
Tacrolimus EP Impurity C—C4X-130025On synthesis
Tadalafil EP Impurity D—C4X-10874On synthesis
Amlodipine Impurity 823048033-49-1C4X-109582On synthesis
Ammonium Glycyrrhizate Impurity B—C4X-25377On synthesis
Beclometasone Dipropionate Monohydrate EP Impurity Q—C4X-147417On synthesis
Calcipotriol EP Impurity G—C4X-12227In stock
Ciclosporin EP Impurity F437611-17-1C4X-199816On synthesis
Dexamethasone Sodium Phosphate EP Impurity F—C4X-116530In stock
Fluocinolone Acetonide EP Impurity K—C4X-238111On synthesis
Megestrol Acetate EP Impurity J14994-27-5C4X-141410In stock
Mirogabalin impurity 68—C4X-292468In stock
Misoprostol EP Impurity A (mixture of isomers)1788085-78-8C1389372On synthesis
Misoprostol EP Impurity C58682-86-3C4X-14593In stock
Moxidectin EP Impurity G—C4X-227514On synthesis
Osimertinib Impurity 62564638-97-5C4X-20456On synthesis
Rifaximin EP Impurity D—C4X-15054On synthesis
Tryptophan impurity 312591-98-2C4X-137331On synthesis
Acarbose EP Impurity B1220983-54-9C4X-11732On synthesis
Acarbose EP Impurity C610271-07-3C4X-11733On synthesis
Aciclovir EP Impurity R—C4X-101018In stock
Acyclovir EP Impurity Q—C4X-101017On synthesis
Ambroxol impurity 05—C4X-1085105On synthesis
Amlodipine Impurity 117—C4X-1095117On synthesis
Amphotericin B EP Impurity C—C4X-18444In stock
Baricitinib Impurity 60—C4X-226060On synthesis
Ethinylestradiol EP Impurity H1350468-76-6C4X-21908On synthesis
Glycero Impurity 261188-64-3C4X-217126On synthesis
Linagliptin Impurity 76 (Mixture of Diastereomers)—C4X-110176On synthesis
Metformin EP Impurity E Sulfate36801-25-9C4X-122029On synthesis
Metoclopramide impurity 47—C4X-141547On synthesis
Mirogabalin Impurity 116—C4X-2924116On synthesis
Moxidectin EP Impurity H2482741-81-9C4X-227515On synthesis
Moxidectin EP Impurity I113463-31-3C4X-227516On synthesis
Mycophenolate EP Impurity B2767988-82-7C4X-21221In stock
Osimertinib Impurity 33—C4X-204533In stock
Relebactam Impurity 147—C4X-2144147On synthesis
Tacrolimus EP Impurity H143210-33-7C4X-130010On synthesis
Triclosan Impurity 567028-17-5C4X-25045On synthesis
Alectinib Impurity 342412921-45-8C4X-283634On synthesis
Avibactam Impurity 150—C4X-1348150On synthesis
Avibactam Impurity 522064219-14-1C4X-134852On synthesis
Azilsartan Impurity 76—C4X-109676On synthesis
Betamethasone impurity 551202002-02-5C4X-143755In stock
Calcium Levofolinate EP Impurity F(Calcium salt)28459-40-7C4X-133519In stock
Dexamethasone Sodium Phosphate EP Impurity C—C4X-116522In stock
Drospirenone EP Impurity F—C4X-16245On synthesis
Dutasteride EP Impurity I3088800-46-5C4X-110317On synthesis
Ergometrine EP Impurity F479-00-5C4X-19485On synthesis
Glycerol Impurity 252075-06-1C4X-217125On synthesis
Ivermectin EP Impurity E—C4X-198214On synthesis
Levothyroxine EP Impurity K5817-39-0C4X-167812In stock
Micafungin Impurity H1392514-05-4C4X-16957On synthesis
Misoprostol EP Impurity D (Mixture of Enantiomers)1788085-79-9C4X-14594In stock
Moxidectin EP Impurity B—C4X-227520On synthesis
Moxidectin EP Impurity L119718-45-5C4X-227511On synthesis
Osimertinib Impurity 81—C4X-204581On synthesis
Teprenone impurity 39—C4X-208139On synthesis
Ubidecarenone (Coenzyme Q10) EP Impurity C (Mixture of Isomers)—C4X-13767On synthesis

Request a quote or email chao.lu@cato-chem.com

Other groups: Antibiotic impurity standards · Impurity and metabolite reference standards · Mycotoxin reference standards · Nitrosamine and nitrosamine-impurity standards · PFAS reference standards · Pesticide and veterinary drug reference standards · Solution and multi-component standards · Stable isotope labelled internal standards · Vitamin reference standards