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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Tacrolimus, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Tacrolimus 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 Tacrolimus-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.

Tacrolimus Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
13-O-Desmethyl Tacrolimus-13CD4 Stable Isotopes CS-O-47411 139958-51-3 (Unlabelled) Enquire
8-epi-Tacrolimus-13CD2 Stable Isotopes CS-O-58223 129212-35-7(Unlabelled) Enquire
Tacrolimus-13C,d2 Stable Isotopes CS-O-03122 1356841-89-8 In Stock
Tacrolimus-13C,d4 Stable Isotopes CS-O-13614 104987-11-3 (Unlabeled) Enquire
Tacrolimus-13C,d5 Stable Isotopes CS-O-49017 Not Available In Stock
Tacrolimus-d3 Stable Isotopes CS-O-48661 104987-11-3 (Unlabeled) Enquire
Tacrolimus-d5 Stable Isotopes CS-O-49019 ---- Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ascomycin API CS-O-00842 104987-12-4 In Stock
Tacrolimus API CS-O-30787 104987-11-3 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
15-O-Desmethyl Tacrolimus Metabolite CS-O-14039 151039-41-7 Enquire
Desmethyl Tacrolimus Metabolite CS-O-14037 132172-14-6 Enquire
Tacrolimus M-IV Metabolite CS-O-44215 Not Available Enquire
Tacrolimus 31 DMT Metabolite CS-O-14038 135635-47-1 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
10-demetyl Tacrolimus Impurity CS-O-33831 Not Available Enquire
13-O-Desmethyl tacrolimus Impurity CS-O-39562 139958-51-3 In Stock
Oxacyclohexane Open Ring Tacrolimus Impurity CS-ED-00227 144432-23-5 In Stock
Tacrolimus 19-epimer Impurity CS-T-54072 144490-63-1 In Stock
Tacrolimus 20-ethoxy acetal Impurity CS-O-53684 Not Available In Stock
Tacrolimus 21-carboxylic acid Impurity CS-O-33256 Not Available In Stock
Tacrolimus 8-Propyl Analog Impurity CS-O-08221 104987-30-6 In Stock
Tacrolimus Butenyl analogue Impurity CS-O-51456 1262804-11-4 Enquire
Tacrolimus C4-epimer Diene Impurity CS-P-09045 ---- Enquire
Tacrolimus Dehydro Impurity Impurity CS-EO-00669 129212-37-9 In Stock
Tacrolimus EP Impurity C Impurity CS-O-57264 ---- Enquire
Tacrolimus EP Impurity H Impurity CS-P-08338 143210-33-7 Enquire
Tacrolimus EP Impurity I Impurity CS-P-00144 104987-16-8 In Stock
Tacrolimus Impurity 21 Impurity CS-P-08962 Not Available In Stock
Tacrolimus Impurity 23 Impurity CS-P-08961 ---- Enquire
Tacrolimus Impurity 6 (Tacrolimus Hydroxy Acid Impurity) Impurity CS-P-02134 1700657-83-5 In Stock
Tacrolimus Impurity III Impurity CS-P-08639 127984-76-3 Enquire
Tacrolimus impurity-1 Impurity CS-T-59735 123719-19-7 Enquire
Tacrolimus Intermediate-1 Impurity CS-O-59632 217480-91-6 Enquire
Tacrolimus Related Compound A Impurity CS-O-35447 135635-46-0 In Stock
Tacrolimus Ring-opening Impurity Impurity CS-P-08282 1393890-33-9 In Stock
12-Hydroxytacrolimus M-IV Impurity CS-O-42141 Not Available Enquire
Tacrolimus alpha-Hydroxy Acid (TAC-H1) Impurity CS-P-08636 Not Available Enquire
Tacrolimus EP Impurity B Impurity CS-EO-01090 Not Available Enquire
Tacrolimus EP Impurity F Impurity CS-EO-01091 Not Available Enquire
Tacrolimus impurity Impurity CS-O-40120 135821-70-4 Enquire
Tacrolimus Impurity 18 Impurity CS-P-08339 129039-81-2 Enquire
Tacrolimus Impurity 39 Impurity CS-O-38229 Not Available Enquire
Tacrolimus Impurity I Impurity CS-EO-00735 135821-69-1 Enquire
Tacrolimus Impurity VII Impurity CS-EO-01009 Not Available Enquire
Tacrolimus Impurity X Impurity CS-EO-00736 127285-26-1 Enquire
Tacrolimus Methyl Acryl Aldehyde Impurity CS-T-61570 109466-74-2 Enquire
Tacrolimus Regioisomer Impurity CS-O-34798 Not Available Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-nitroso Tacrolimus 21-Carboxy Acid Nitrosamine CS-O-52288 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Tacrolimus Secondary Standards CS-SS-24755-500MG 109581-93-3 Enquire
Tacrolimus Secondary Standards CS-SS-24755-150MG 109581-93-3 Enquire
Tacrolimus Secondary Standards CS-SS-24755 109581-93-3 Enquire
Tacrolimus Impurity C Secondary Standards CS-SS-26343 789.99 Enquire
Tacrolimus Impurity F Secondary Standards CS-SS-26342 1393890-33-9 Enquire


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Tacrolimus System suitability mixture (containing Tacrolimus... EP Standards CS-EG-03505 104987-11-3 Enquire


Therapeutic

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
8-Epitacrolimus Therapeutic CS-T-53956 129212-35-7 In Stock
Tacrolimus Impurity 2 Therapeutic CS-T-54717 131944-48-4 In Stock
Tacrolimus Lactone Isomer Therapeutic CS-O-08222 134590-88-8 Enquire
Tacrolimus Monohydrate Therapeutic CS-O-08223 109581-93-3 Enquire