Reference standards play a crucial role in the field of immunosuppressants by providing a benchmark for the accurate and precise measurement of these drugs. These standards act as a reference point for laboratories and researchers, enabling them to validate their analytical methods and ensure the reliability of their results. By using reference standards, scientists can compare the potency, purity, and concentration of immunosuppressants in different samples, thereby facilitating quality control in the manufacturing and testing of these medications. Additionally, reference standards aid in the development and evaluation of new immunosuppressants, allowing for the establishment of consistent and standardized protocols. Ultimately, the use of reference standards ensures the safety and efficacy of immunosuppressants, benefiting patients who rely on these drugs for organ transplantation or the management of autoimmune diseases.

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Ascomycin CS-O-00842 API Standards
ASCOMYCIN 19-EPIMER CS-ED-00226 Impurities
Azathioprine CS-T-04478 API Standards
Azathioprine 13C4 CS-O-03166 Stable Isotopes
Azathioprine EP Impurity C CS-W-00177 Impurities
Azathioprine EP Impurity D CS-P-07089 Impurities
Azathioprine EP Impurity E Sod... CS-P-07088 Impurities
Azathioprine-d3 CS-O-15630 Stable Isotopes
Basiliximab CS-O-13173 API Standards
Benzeneethanol, 4-octyl CS-O-31265 Intermediates

Biolimus CS-O-07370 API Standards
Bis(2-Chloroethyl)amine hydroc... CS-O-31094 Fine Chemicals
Bis(2-chloroethyl)amine-d4 Hyd... CS-T-49246 Stable Isotopes
Carboxyphosphamide CS-T-10511 Intermediates
Ciclosporin (C2163000) CS-EG-00345 EP Standards
Cyclophosphamide CS-O-15107 API Standards
Cyclophosphamide Amide Related... CS-T-50721 Intermediates
Cyclophosphamide D4 CS-T-51479 Stable Isotopes
Cyclophosphamide D6 CS-CX-00272 Stable Isotopes
Cyclophosphamide D8 CS-O-06517 Stable Isotopes
Cyclophosphamide Impurity B CS-T-33454 Impurities
Cyclophosphamide monohydrate CS-O-06288 API Standards
Cyclophosphamide Related Compo... CS-T-03377 Impurities
Cyclophosphamide Related Compo... CS-T-11152 Impurities
Cytarabine CS-M-34862 API Standards
Cytarabine-13C3 CS-T-92656 Stable Isotopes
Deschloro dehydro pimecrolimus CS-O-33551 Impurities
Deschloro pimecrolimus CS-O-33086 Impurities
Diethyl 2-Acetamido-2-[2-(4-oc... CS-T-18056 Intermediates
Ethyl (3R,S)-2,2-difluoro-3-hy... CS-O-31377 Impurities
Ethyl 3-methylisoxazole-4-carb... CS-O-14369 Intermediates
Fingolimod CS-O-01552 API Standards
Fingolimod D4 CS-O-02993 Stable Isotopes
Fingolimod D4 Hydrochloride CS-T-55108 Stable Isotopes
Fingolimod Decyl Impurity CS-P-04579 Impurities
Fingolimod Heptyl Impurity CS-P-07987 Impurities
Fingolimod Hexyl Impurity CS-P-04581 Impurities
Fingolimod hydrochloride CS-T-24885 API Standards
Fingolimod Hydrochloride EP im... CS-O-31267 Impurities
Fingolimod Impurity 12 Hydroch... CS-P-07992 Impurities
Fingolimod Impurity 13 CS-P-07993 Impurities
Fingolimod Impurity 14 CS-P-07994 Impurities
Fingolimod Impurity 4 CS-O-14355 Impurities
Fingolimod Impurity 5 CS-P-07988 Impurities
Fingolimod Impurity 8 CS-P-07991 Impurities
Fingolimod Impurity A Hydrochl... CS-P-07996 Impurities
Fingolimod impurity C CS-P-07997 Impurities
Fingolimod M28 CS-O-12046 Metabolites
Fingolimod M29 CS-O-12047 Impurities
Fingolimod M30 CS-O-12048 Impurities
Fingolimod Methyl Impurity CS-P-07986 Impurities
Fingolimod nonyl homolog CS-ED-00012 Impurities
Fingolimod phosphate CS-O-05860 Metabolites
Fingolimod phosphate D4 CS-O-03010 Stable Isotopes
Fingolimod phosphate D4 HCl CS-O-15984 Stable Isotopes
Fingolimod Phosphate Hydrochlo... CS-P-07995 API Standards
Gemcitabine 13C,15N2 Hydrochlo... CS-O-10151 Stable Isotopes
Gemcitabine base CS-O-31376 API Standards
Gemcitabine Cytosine CS-DN-00011 Impurities
Gemcitabine Diphosphate-13C-15... CS-O-33051 Stable Isotopes
Gemcitabine Hydrochloride CS-O-11658 API Standards
Gemcitabine Monophosphate Form... CS-T-55232 Impurities
Gemcitabine Triphosphate-13C-1... CS-O-33052 Stable Isotopes
Gemcitabine α-Anomer CS-CY-00031 Impurities
Heptyl Deoctyl Fingolimod Hydr... CS-T-25990 Intermediates
Hydrocortisone CS-O-10249 API Standards
Hydrocortisone (9ß,11ß)-Epoxid... CS-T-55721 Impurities
Hydrocortisone 21-Butyrate CS-T-55723 Intermediates
Hydrocortisone Acetate CS-O-30945 API Standards
Hydrocortisone Acetate EP impu... CS-P-07495 Impurities
Hydrocortisone D4 CS-O-02905 Stable Isotopes
Hydrocortisone EP Impurity G CS-T-55719 Impurities
Hydrocortisone EP Impurity H CS-O-14791 Impurities
Hydrocortisone EP Impurity I CS-O-14792 Impurities
Hydrocortisone EP Impurity J CS-O-14793 Impurities
Hydrocortisone EP Impurity K CS-O-14796 Impurities
Hydrocortisone EP Impurity L CS-O-14102 Metabolites
Hydrocortisone EP Impurity N CS-O-14797 Impurities
Hydrocortisone Hydrogen Succin... CS-O-04502 Intermediates
Hydrocortisone Impurity 18 CS-P-08185 Impurities
Hydrocortisone sodium succinat... CS-O-03554 Intermediates
Hydrocortisone sulfobenzoate CS-O-13287 Impurities
Hydrocortisone-17-hemisuccinat... CS-P-04800 Impurities
Hydrocortisone-17-Succinate So... CS-O-16702 Impurities
Hydrocortisone-21-propionate CS-O-11460 Impurities
Hydroxy Cyclophosphamide O-Met... CS-T-55918 Impurities
Hydroxy cyclophosphamide Semic... CS-T-27075 Intermediates
Leflunomide CS-O-01811 API Standards
Leflunomide EP Impurity A CS-T-62361 Impurities
Leflunomide EP Impurity E CS-O-05797 Impurities
Leflunomide EP Impurity F CS-O-13278 Impurities
Leflunomide EP Impurity G CS-O-13279 Impurities
Leflunomide EP Impurity H CS-O-13280 Impurities
Leflunomide Related Compound B CS-T-04169 Impurities
Leflunomide-d4 CS-O-11466 Stable Isotopes
Methotrexate CS-O-30641 API Standards
Methotrexate D3 CS-O-06766 Stable Isotopes
Methotrexate D7 Triglutamate CS-O-32925 Stable Isotopes
Methotrexate Dimethylamide CS-T-81347 Impurities
Methotrexate EP Impurity A CS-T-40938 Impurities
Methotrexate EP Impurity B CS-M-42743 Impurities
Methotrexate EP Impurity C CS-T-33870 Impurities
Methotrexate EP Impurity D CS-T-34871 Impurities
Methotrexate EP Impurity E CS-T-14358 Impurities
Methotrexate EP Impurity F CS-O-15235 Impurities
Methotrexate EP Impurity H CS-T-32162 Impurities
Methotrexate EP Impurity I CS-T-32161 Impurities
Methotrexate EP Impurity J CS-T-32157 Impurities
Methotrexate EP Impurity L CS-T-33045 Impurities
Methotrexate sodium CS-O-01873 API Standards
Methyl 4'-Tosylmycophenolate CS-T-35242 Impurities
Methyl 6'-Desmethyl-4'-tosylmy... CS-T-33569 Impurities
Mono-O-acetyl Fingolimod CS-O-15957 Impurities
Mycophenolate isosorbide ester CS-O-33483 Impurities
Mycophenolate Mofetil CS-O-01852 API Standards
Mycophenolate Mofetil D4 CS-T-59022 Stable Isotopes
Mycophenolate Mofetil EP Impur... CS-T-52249 Impurities
Mycophenolate Mofetil EP Impur... CS-T-58986 Impurities
Mycophenolate Mofetil EP Impur... CS-T-58369 Impurities
Mycophenolate Mofetil EP Impur... CS-T-58368 Impurities
Mycophenolate Mofetil EP Impur... CS-T-59023 Impurities
Mycophenolate Mofetil Hydrochl... CS-O-03185 Stable Isotopes
Mycophenolate Mofetil impurity... CS-O-33796 Impurities
Mycophenolate Mofetil impurity... CS-O-33797 Impurities
Mycophenolate Mofetil Related ... CS-T-93293 Impurities
Mycophenolate sodium CS-O-01874 API Standards
Mycophenolic Acid 13C-d3 CS-O-01192 Stable Isotopes
Mycophenolic acid D3 CS-O-06796 Stable Isotopes
Mycophenolic Acid Glucuronide CS-O-30516 Glucuronides
Mycophenolic Acid Lactone (EP ... CS-T-83349 Impurities
Mycophenolic Acid Sorbitol Est... CS-O-32765 Fine Chemicals
N,N-diethyl-1,5-dihydro-2,4,3-... CS-O-31263 Impurities
N-Carboxybenzyl Gemcitabine CS-T-50308 Impurities
N-Deschloroethyl-N-hydroxyethy... CS-O-14063 Metabolites
N-Ethyl Fingolimod CS-O-14612 Metabolites
O-Desmethyl Mycophenolic Acid CS-T-16342 Impurities
ortho-Fingolimod CS-T-82974 Impurities
Oxacyclohexane Open Ring Tacro... CS-ED-00227 Impurities
Phosphoramide Mustard D8 CS-O-13680 Stable Isotopes
Pimecrolimus CS-T-60585 API Standards
Prednisolone Hemisuccinate CS-T-60723 Impurities
Premedrol Acetate impurity CS-O-15685 Impurities
Ridaforolimus CS-T-61148 Impurities
Sirolimus CS-O-08101 API Standards
Sirolimus 13C D3 CS-O-11374 Stable Isotopes
Sirolimus D3 CS-O-02669 Stable Isotopes
Tacrolimus CS-O-30787 API Standards
Tacrolimus 13 DMT CS-O-14037 Metabolites
Tacrolimus 13CD2 CS-O-03122 Stable Isotopes
Tacrolimus 15 DMT CS-O-14039 Metabolites
Tacrolimus 21-carboxylic acid CS-O-33256 Impurities
Tacrolimus 31 DMT CS-O-14038 Metabolites
Tacrolimus 8-Propyl Analog CS-O-08221 Impurities
Tacrolimus Diene CS-P-00144 Impurities
Tacrolimus Impurity 2 CS-T-54717 Impurities
Tacrolimus Impurity 6 (Tacroli... CS-P-02134 Impurities
Tacrolimus impurity-1 CS-T-59735 Impurities
Tacrolimus Lactone Isomer CS-O-08222 Impurities
Tacrolimus Methyl Acryl Aldehy... CS-T-61570 Impurities
Tacrolimus Monohydrate CS-O-08223 API Standards
Tacrolimus-13CD4 CS-O-13614 Stable Isotopes
Teriflunomide CS-O-05920 API Standards
Teriflunomide D4 CS-O-03076 Stable Isotopes
Tetrakis(2-chloroethyl)phospho... CS-T-61916 Impurities
Thiouric Acid-13C3 Sodium Salt... CS-O-15631 Stable Isotopes
Triamcinolone 16,21-Diacetate CS-T-62231 Intermediates
Zotarolimus CS-T-62856 API Standards
"(D-Erythro D-Threo)-2-Deoxy-2... CS-O-31378 Intermediates
"2,2-Dimethyl-5-[2-(4-octylphe... CS-T-91411 Impurities
"24,33-Bis-O-(tert-butyldimeth... CS-T-50045 Intermediates
"2-Deoxy-2,2-difluoro-D-ribofu... CS-O-31374 Intermediates
"9-Hydroxy-4,7-diaza-nonyl Pho... CS-T-78662 Impurities
"Gemcitabine - 2,2-Difluoro-2-... CS-DN-00010 Impurities
"N1,N3-divinylpropane-1,3-diam... CS-O-11810 Impurities
(E)-Teriflunomide CS-O-15326 Chiral
(R,S)-4-Hydroxy Cyclophosphami... CS-T-27072 Intermediates
(Z)-Mycophenolic Acid CS-P-02701 Impurities
1-Epi Gemcitabine Hydrochlorid... CS-T-54079 Impurities
1-Hydroxy Fingolimod Hydrochlo... CS-T-79649 Intermediates
1-Hydroxy-3-nitrodeamino Fingo... CS-T-27959 Impurities
2-(4-Octylphenyl)-1-iodoethane CS-O-31266 Intermediates
2,2-Difluoro-2-deoxyuridine CS-T-52849 Impurities
21-Chloro Hydrocortisone CS-P-07493 Impurities
21-Dehydro-17-Deoxy Hydrocorti... CS-O-11900 Metabolites
21-Deoxy Hydrocortisone CS-P-07494 Impurities
21-Norrapamycin CS-ED-00191 Impurities
24,32-Bis-O-(tert-butyldimethy... CS-T-49217 Impurities
2-acetamido-2-(2-bromo-4-octyl... CS-O-33273 Impurities
2-acetamido-2-(3-bromo-4-octyl... CS-O-33274 Impurities
2-Cyano-3-hydroxy-N-(4-methylp... CS-T-89832 Impurities
2-Deoxy-2,2-difluoro-D-erythro... CS-O-31379 Intermediates
2'-Deoxy-3',5'-di-O-benzoyl-2'... CS-T-51936 Intermediates
2-Dimethylamino Fingolimod CS-T-19835 Impurities
2-Nitrodeamino Fingolimod CS-T-59400 Impurities
2-Phenethyl fingolimod analog CS-O-15958 Impurities
3-chloro-1-(4-octylphenyl)-pre... CS-O-31421 Intermediates
3'-Epi Gemcitabine CS-T-54081 Impurities
3'-Epi Gemcitabine 3',5'-Diben... CS-T-54080 Impurities
3-Methylisoxazole-4-carboxylic... CS-T-34159 Fine Chemicals
3-Phenethyl fingolimod analog CS-O-15959 Impurities
3-Trifluoromethyl Teriflunomid... CS-O-33469 Impurities
4-Hydroperoxy Cyclophosphamide CS-T-26477 Intermediates
4-Hydroxy Cyclophosphamide CS-O-31223 Metabolites
4-Hydroxy-Teriflunomide CS-T-28773 Metabolites
4-Methyl-5,7- dihydroxyisobenz... CS-O-13912 Intermediates
4-Oxo Cyclophosphamide CS-T-60008 Intermediates
4-Oxo Cyclophosphamide-d8 CS-P-07356 Stable Isotopes
5-β-Dihydrocortisone Acet... CS-T-53029 Impurities
5-Amino-1-methyl-4-nitroimidaz... CS-T-03031 Intermediates
5-Fluoro-6-hydroxyhydro Uracil CS-T-24043 Impurities
5-Fluorodihydropyrimidine-2,4-... CS-T-23993 Intermediates
5-Fluorodihydropyrimidine-2,4-... CS-T-54822 Stable Isotopes
5-Fluorouracil-13C 15N2 CS-P-02912 Stable Isotopes
5-Methyl-4-isoxaze-4-carboxyli... CS-O-32251 Intermediates
5-Methylisoxazole-3-carboxylic... CS-T-58317 Stable Isotopes
6-Hydroxy Hydrocortisone Valer... CS-O-33415 Impurities
6-O-Methyl Mycophenolic Acid M... CS-T-34443 Impurities
7-O-Demethyl Rapamycin CS-T-51872 Metabolites
8-Epitacrolimus CS-T-53956 Impurities
β-Gemcitabine 13C,15N2 Hydroch... CS-O-14759 Stable Isotopes