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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Prednisolone, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Prednisolone impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Prednisolone-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Prednisolone Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
16α-Hydroxyprednisolone-d5 Stable Isotopes CS-O-33707 13951-70-7 (Unlabeled) Enquire
6a,9a-Difluoroprednisolone-17-butyrate-d6 Stable Isotopes CS-B-00273 23640-96-2 (unlabeled) Enquire
6-alpha-Methylprednisolone-D6 Stable Isotopes CS-O-14401 83-43-2 (Unlabeled) Enquire
6-alpha-Methylprednisolone-d6 (Major) Stable Isotopes CS-O-60109 83-43-2 (Unlabeled) Enquire
6a-Methylprednisolone-17-Propionate-D6 (major) Stable Isotopes CS-F-00064 79512-61-1(Unlabelled) Enquire
6α-Methyl Prednisolone-d3 3,20-Dioxime Stable Isotopes CS-T-99463 Not Available Enquire
6α-Methyl-20(R)-hydroxy Prednisolone 21-Acetate-d5 Stable Isotopes CS-T-99473 Not Available Enquire
6-α-Methyl-Prednisolone D4 Stable Isotopes CS-BU-00018 Not Available Enquire
Methylprednisolone 21-Propionate-d5 Stable Isotopes CS-T-99462 Not Available Enquire
Prednisolone 21-Propionate-d5 Stable Isotopes CS-T-94335 5740-62-5(Unlabelled) Enquire
Prednisolone D8 Acetate Stable Isotopes CS-O-15754 52-21-1 (Unlabeled) Enquire
Prednisolone-d6 Stable Isotopes CS-O-02641 50-24-8 (Unlabeled) In Stock
Prednisolone-d8 (Major) Stable Isotopes CS-T-95525 512165-95-6 (Unlabelled) Enquire
Prednisolone-d8 (Major) 21-β-D-Glucuronide Stable Isotopes CS-T-98412 Not Available Enquire
Prednisolone-d8 (Major) Acetate Stable Isotopes CS-T-95526 52-21-1 (Unlabelled) Enquire
Prednisolone-d8 21-Sulfate Sodium Salt Stable Isotopes CS-T-99124 Not Available Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Methylprednisolone API Standards CS-O-06007 83-43-2 In Stock
Methylprednisolone Aceponate API Standards CS-O-01830 86401-95-8 In Stock
Methylprednisolone hydrogen succinate API Standards CS-O-01851 2921-57-5 In Stock
Prednisolone API Standards CS-O-02063 50-24-8 In Stock
Prednisolone Acetate API Standards CS-O-02113 52-21-1 In Stock
Prednisolone phosphate API Standards CS-O-02090 302-25-0 In Stock
Prednisolone sodium phosphate API Standards CS-O-02137 125-02-0 In Stock


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
14-α-Hydroxy Prednisolone Metabolites CS-T-56388 95815-58-0 Enquire
6a-Methyl Prednisolone 21-Acetate Metabolites CS-T-58553 53-36-1 In Stock
Prednisolone 21-Sulfate Sodium Salt Metabolites CS-T-60722 3664-95-7 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"6a,9a-Difluoroprednisolone" Impurities CS-T-52911 806-29-1 Enquire
"Difluoroprednisolone-17, 21-Diacetate" Impurities CS-P-02379 23641-05-6 Enquire
(8S,9S,10R,11S,13S,14S)-11-hydroxy-10,13-dimethyl-17-(4-meth... Impurities CS-O-38769 Not Available Enquire
(8S,9S,10R,11S,13S,14S)-11-hydroxy-10,13-dimethyl-3-oxo-6,7,... Impurities CS-O-38767 Not Available Enquire
(8S,9S,10R,11S,13S,14S)-11-hydroxy-17-(4-(hydroxymethyl)-1,3... Impurities CS-O-38766 Not Available Enquire
(Z)-2-hydroxy-2-((8S,9S,10R,11S,13S,14S)-11-hydroxy-10,13-di... Impurities CS-O-38768 118864-87-2 Enquire
1,2-Dihydro 11-Keto Methylprednisolone Impurities CS-O-44228 1746-38-9 Enquire
11-Alpha-hydroxyprednisolone sodium phosphate Impurities CS-EO-01278 Not Available In Stock
11-Alpha-Methylprednisolone Impurities CS-O-50148 105500-05-8 Enquire
16a-Butyloxyprednisolone (Budenoside Impurity) Impurities CS-T-50101 113930-13-5 In Stock
16alpha-Hydroxyprednisolone Impurities CS-O-00864 13951-70-7 In Stock
16-Beta-17-Alpha Hydroxy Prednisolone Impurities CS-O-42674 2408699-72-7 Enquire
16α-Hydroxyprednisolone Acetate Impurities CS-T-93988 86401-80-1 Enquire
17-Dehydroxy Prednisolone Impurities CS-T-14972 13479-38-4 In Stock
17-Deshydroxyacetyl 17-Carbonyl Prednisolone Impurities CS-T-96043 167997-18-4 Enquire
17-O-Acetyl-6-methylprednisolone Impurities CS-T-64561 86401-94-7 In Stock
17α,21-Dideoxy-6α,9α-Difluoroprednisolone Impurities CS-T-91232 167997-12-8 Enquire
20 β-hydroxy-6-α-methyl Prednisolone Impurities CS-O-16490 103574-57-8 In Stock
20 β-hydroxymethyl Prednisolone Impurities CS-O-16489 387-66-6 In Stock
20-Deoxo-20ß-hydroxy-6α-Methyl Prednisolone Impurities CS-T-73743 387-65-5 Enquire
21-Dehydro Prednisolone Impurities CS-T-51793 22420-16-2 Enquire
21-Dehydro-16a-hydroxy Prednisolone Impurities CS-T-51776 1188271-73-9 Enquire
21-Dehydro-6a-methyl Prednisolone Impurities CS-T-51768 58636-50-3 Enquire
5β-4,5-Dihydro Prednisolone 21-Acetate Impurities CS-T-91694 114127-54-7 Enquire
6 α,9α-difluoro prednisolone 17,21-Trimethylortobutyrate Impurities CS-O-51132 23640-92-8 Enquire
6a,9a-Difluoroprednisolone 17-Acetate Impurities CS-T-52912 23674-85-3 Enquire
6a,9a-Difluoroprednisolone 21-Acetate Impurities CS-T-52917 52-70-0 Enquire
6a-9-Difluoroprednisolone-17-Carboxylate Impurities CS-T-89617 1234557-20-0 Enquire
6a-Fluoro-16a-Hydroxyprednisolone Impurities CS-F-00217 3915-36-4 Enquire
6a-Hydroxy Prednisolone Acetate Impurities CS-T-56373 134526-05-9 Enquire
6alpha-​hydroxyprednisolone Impurities CS-O-44164 95909-33-4 Enquire
6a-Methyl Prednisolone 17,21-(Ethyl)orthopropionate Impurities CS-T-80141 85198-27-2 Enquire
6a-Methyl Prednisolone 17-Hemisuccinate Impurities CS-T-80702 77074-42-1 In Stock
6a-Methyl Prednisolone 17-Propionate Impurities CS-T-80696 79512-61-1 In Stock
6a-Methyl Prednisolone 21-Sulfate Ester Impurities CS-T-82450 1127921-80-5 Enquire
6a-Methyl Prednisolone Propionate 17-carboxylic acid Impurities CS-O-51826 Not Available Enquire
6-beta-methylprednisolone aceponate Impurities CS-O-51824 Not Available Enquire
6-Dehydro Prednisolone Impurities CS-ZG-77365 2427-64-7 Enquire
6-methylene prednisolone aceponate Impurities CS-O-51827 Not Available Enquire
6α,​9α-​Difluoroprednisolone 21-Butyrate Impurities CS-T-93416 Not Available Enquire
6α-chloro-9-fluoro prednisolone Impurities CS-O-53022 806-27-9 Enquire
6α-hydroxy-9-fluoro prednisolone Impurities CS-O-53020 1296177-39-3 Enquire
6α-Methyl-20(R)-hydroxy Prednisolone 21-Acetate Impurities CS-T-82346 93963-74-7 Enquire
6-β-Hydroxy Prednisolone Impurities CS-T-56387 16355-29-6 Enquire
6-β-Methyl Prednisolone 21-Acetate Impurities CS-T-58554 1048031-82-8 Enquire
6-β-Methylprednisolone Impurities CS-T-58623 18462-27-6 Enquire
9 α-Fluoro prednisolone 17,21-Trimethylortobutyrate Impurities CS-O-51131 Not Available Enquire
9a-Fluoro-6a-methylprednisolone 21-Acetate Impurities CS-T-74540 432-33-7 Enquire
9-Alpha-Fluro-21-Chlorine,prednisolone-17-propioinate Impurities CS-O-58192 Not Available Enquire
9α-Fluoro Prednisolone 17-Butyrate-21-acetate Impurities CS-O-51129 Not Available Enquire
Delta-9,11-Methylprednisolone Acetate Impurities CS-O-33125 93239-37-3 In Stock
Deltacortinene Acetate Impurities CS-T-15069 4380-55-6 In Stock
Deoxyprednisolone-16-ene Impurities CS-O-13256 3103-17-1 In Stock
D-Homo-16-alphahydroxy prednisolone Impurities CS-EO-01003 Not Available Enquire
Dimer Methylprednisolone Impurities CS-T-93546 Not Available Enquire
Methyl Prednisolone sulfate Impurities CS-O-14860 Not Available Enquire
Methyl Prednisolone Sulfate Triethyl Amine Impurities CS-O-36742 1127921-81-6 In Stock
Methylprednisolone Acetate EP Impurity D Impurities CS-EO-00457 150899-33-5 Enquire
Methylprednisolone Acetate EP Impurity F Impurities CS-EO-00458 Not Available Enquire
Methylprednisolone Acetate EP Impurity H Impurities CS-EO-00459 1968-76-9 Enquire
Methylprednisolone EP Impurity B Impurities CS-EO-00130 Not Available Enquire
Methylprednisolone EP Impurity D Impurities CS-EO-00460 1338549-02-2 Enquire
Methylprednisolone EP Impurity D (E-Isomer) Impurities CS-T-53229 1338549-02-2 Enquire
Methylprednisolone EP Impurity D (Z-Isomer) Impurities CS-O-49403 1338549-02-2 Enquire
Methylprednisolone Hemisuccinate β isomer Impurities CS-O-34377 Not Available In Stock
Prednienic Acid Impurities CS-T-60717 37927-29-0 In Stock
Prednisolone 11,21-Diacetate Impurities CS-T-84041 98523-85-4 In Stock
Prednisolone 17-(Ethyl Carbonate) 21-Acetate Impurities CS-T-60719 671225-23-3 Enquire
Prednisolone 17-beta hydroxyacid Impurities CS-O-57887 95671-46-8 Enquire
Prednisolone 20-ethyl Ester Impurities CS-P-08479 Not Available Enquire
Prednisolone 21-Ethylcarbonate Impurities CS-T-60720 2205-88-1 Enquire
Prednisolone 21-Propionate Impurities CS-T-60725 5740-62-5 Enquire
Prednisolone Aldehyde Impurity Impurities CS-O-54923 Not Available Enquire
Prednisolone Caproate Impurities CS-T-60724 69164-69-8 Enquire
Prednisolone Dehydrated (Ether form) Impurities CS-O-36057 96168-88-6 In Stock
Prednisolone D-Homo A derivative Impurities CS-EO-00433 95615-71-7 Enquire
Prednisolone D-homo B Derivative Impurities CS-EO-00394 Not Available Enquire
Prednisolone Dicarbonate Impurities CS-P-08480 1428883-48-0 Enquire
Prednisolone EP Impurity A Hydrochloride Impurities CS-EO-03780 393782-60-0 Enquire
Prednisolone EP Impurity F Impurities CS-T-53958 600-90-8 Enquire
Prednisolone EP Impurity J Impurities CS-T-15501 1807-14-3 In Stock
Prednisolone Hemisuccinate Impurities CS-T-60723 2920-86-7 Enquire
Prednisolone Impurity 11 Impurities CS-O-59866 118866-09-4 Enquire
Prednisolone Impurity 2 Impurities CS-O-44180 Not Available Enquire
Prednisolone metasulfobenzoate Impurities CS-O-13285 39175-74-1 Enquire
Prednisolone Sodium Metasulfobenzoate Impurities CS-T-40421 630-67-1 In Stock
Prednisolone Sodium Phosphate 11-Phospahte Impurities CS-EO-00032 Not Available In Stock
Prednisolone sodium phosphate Isomer III Impurities CS-EO-00455 Not Available Enquire
Prednisolone Sodium Phosphate USP Impurity A Impurities CS-T-92637 Not Available Enquire
Prednisolone Sodium Phosphate USP Impurity E Impurities CS-O-44214 Not Available Enquire
Prednisolone sodium phosphate USP impurity F Impurities CS-EO-00742 Not Available Enquire
Prednisolone Tebutate Impurities CS-T-60726 7681-14-3 Enquire
Prednisolone-17-acetate Impurities CS-O-15897 52628-64-5 Enquire
Prednisolone-21-carboxylic Acid Impurities CS-T-84728 61549-70-0 Enquire
Prednisolone-21-Dimethyl amine Impurities CS-O-13291 Not Available Enquire


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Methylprednisolone (M1750000) EP Standards CS-EG-01275 83-43-2 Enquire
Methylprednisolone for system suitability A (Y0001799) EP Standards CS-EG-01476 83-43-2 Enquire
Prednisolone (P2700000) EP Standards CS-EG-00708 50-24-8 Enquire
Prednisolone acetate (P2800000) EP Standards CS-EG-00707 52-21-1 Enquire
Prednisolone acetate for peak identification (Y0000582) EP Standards CS-EG-00706 52-21-1 Enquire
Prednisolone For Peak Identification EP Standards CS-EG-00608 Not Available Enquire
Prednisolone for system suitability (Y0001355) EP Standards CS-EG-01541 50-24-8 Enquire
Prednisolone Pivalate (P2805000) EP Standards CS-EG-00704 1107-99-9 Enquire
Prednisolone sodium phosphate (P2810000) EP Standards CS-EG-02155 125-02-0 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"Prednisolone 17,21-Diacetate" Intermediates CS-T-84491 17652-24-3 Enquire
16Alpha-Hydroxy-11-keto Prednisolone Intermediates CS-T-62400 3754-05-0 Enquire
16a-Methyl Prednisolone Intermediates CS-T-58586 10417-63-7 In Stock
16a-Methyl Prednisolone 21-Acetate Intermediates CS-T-58563 13209-52-4 Enquire
16a-Methyl-11-oxo Prednisolone Intermediates CS-T-58080 2036-77-3 In Stock
20(R)-Hydroxy Prednisolone Intermediates CS-T-56390 15847-24-2 Enquire
20(S)-Hydroxy Prednisolone Intermediates CS-T-56389 2299-46-9 Enquire
21-Deoxyprednisolone Intermediates CS-T-52014 20423-99-8 In Stock
6,7-Dehydro Prednisolone 21-Acetate Intermediates CS-T-73187 2427-45-4 Enquire
6Alpha-Fluprednisolone Intermediates CS-T-76823 53-34-9 Enquire
6a-Methyl Prednisolone 17-Deshydroxy 17ß-Carboxylic Acid Intermediates CS-T-81103 229019-44-7 Enquire
7a-Chloro-16a-methyl Prednisolone Intermediates CS-T-50844 67452-97-5 Enquire
9?-Fluoroprednisolone 17-Valerate Intermediates CS-T-75284 2802-10-0 Enquire
9a-Bromo-16a-methylprednisolone Intermediates CS-T-49533 26543-61-3 Enquire
Methylprednisolone 21-Propionate Intermediates CS-T-58642 138804-88-3 Enquire
Methylprednisolone Sodium Succinate Intermediates CS-O-31166 2375-03-03 In Stock
Methylprednisolone suleptanate Intermediates CS-ED-31990 90350-40-6 Enquire
Prednisolone 17-Ethyl Carbonate Intermediates CS-T-84478 104286-02-4 Enquire
Prednisolone 21-Hemisuccinate Sodium Salt Intermediates CS-T-84079 1715-33-9 Enquire
Prednisolone 21-Methanesulfonate Intermediates CS-T-84083 35410-28-7 Enquire
Prednisolone 21-sulphate sodium Intermediates CS-O-13990 3664-95-7 Enquire
Prednisolone Pivalate Intermediates CS-T-84168 1107-99-9 In Stock


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6a-Methyl Prednisolone 21-O-ß-D-Glucuronide Glucuronides CS-T-82706 805219-19-6 Enquire
Allo-3-alpha-tetrahydro cortisol 21-O-beta-D-glucuronide Glucuronides CS-T-47539 131061-62-6 Enquire
Methylprednisolone Glucuronide Glucuronides CS-O-14859 Not Available Enquire
Prednisolone 21-β-D-Glucuronide Glucuronides CS-T-60721 512165-95-6 In Stock