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

Cytidine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
[1',2',3',4',5'-13C5]cytidine Stable Isotopes CS-OC-00292 65-46-3 (unlabeled) Enquire
[1'-D]2'-deoxycytidine monohydrate Stable Isotopes CS-OC-00287 951-77-9 (unlabeled) Enquire
[1'-D]cytidine Stable Isotopes CS-OC-00286 65-46-3 (unlabeled) Enquire
2’,3’,5’-Tri-O-(4-chlorobenzoyl) 5-Azacytidine-15N4 Stable Isotopes CS-T-102259 Not Available Enquire
2’,3’-Di-O-acetyl-5’-deoxy-5-fluoro-N4-(pentoxy-d11-carbonxy... Stable Isotopes CS-T-102239 Not Available Enquire
2’-Deoxycytidine 5’-Triphosphate-13C,15N2 Triethylamine Stable Isotopes CS-T-96610 Not Available Enquire
2’-Deoxycytidine-1’-13C Monohydrate Stable Isotopes CS-T-74073 478510-83-7 Enquire
2’-O-Methyl-d3 Cytidine Stable Isotopes CS-T-102978 2140-72-9(Unlabelled) Enquire
2'-Deoxy Cytidine-13C, 15N Stable Isotopes CS-T-95687 951-77-9(Unalabelled) Enquire
2'-Deoxy Isocytidine-5',5'-d2 Monohydrate Stable Isotopes CS-T-51993 478511-25-0 Enquire
2'-Deoxy-5-formyl-cytidine-1,3-15N2,2-13C Stable Isotopes CS-T-100542 Not Available Enquire
2-DEOXYCYTIDINE H2O (DEOXYRIBOSE-2-13C) Stable Isotopes CS-R-00239 478511-23-8 Enquire
2-Deoxycytidine-15N3 Stable Isotopes CS-R-00232 951-77-9 (Unlabeled) In Stock
2'-Deoxycytidine-2'-13C Stable Isotopes CS-T-95686 185553-94-0 Enquire
2'-Deoxycytidine-5',5''-d2 Stable Isotopes CS-T-96611 781609-71-0 Enquire
2'-Deoxy-N-methyl-cytidine-d3 Stable Isotopes CS-T-100541 Not Available Enquire
3',5'-Bis(4-methylbenzoate) 2'-Deoxycytidine-13C,15N2 Stable Isotopes CS-T-102614 C2413CH25N15N2O6 Enquire
3,N4-Etheno-2’-deoxycytidine-13C,15N2 Stable Isotopes CS-T-101426 Not Available Enquire
3’,5’-Di-p-toluoyl-2’-deoxycytidine-d3 Stable Isotopes CS-T-100374 Not Available Enquire
3-Methyl Cytidine-d3 Methosulfate-d3 Stable Isotopes CS-T-102271 Not Available Enquire
4-(1,2,4-Triazolyl)-3’5’-di-O-4-toluoyl-5-methyl-2’-deoxycyt... Stable Isotopes CS-T-102261 Not Available Enquire
4-(1,2,4-Triazolyl)-3’5’-di-O-p-toluoyl-2’-deoxycytidine-13C... Stable Isotopes CS-T-96457 Not Available Enquire
4'-C-(Chloromethyl)-2'-deoxy-2'-fluoro-cytidine 3',5'-Bis(2-... Stable Isotopes CS-T-100641 Not Available Enquire
5-(Hydroxymethyl)-2’-deoxycytidine-d3 Stable Isotopes CS-T-96542 Not Available Enquire
5’-Carboxyl-2'-deoxycytidine-13C,15N2 Stable Isotopes CS-T-102248 Not Available Enquire
5’-Deoxy-2’,3’-O-isopropylidene-4-thio-5-fluorocytidine-13C,... Stable Isotopes CS-T-102240 Not Available Enquire
5’-Deoxy-2’,3’-O-isopropylidene-5-fluorocytidine-13C,15N2 Stable Isotopes CS-T-102242 Not Available Enquire
5’-Formyl-2’-deoxy Cytidine-13C,15N2 Stable Isotopes CS-T-102234 Not Available Enquire
5’-Deoxy-5-fluorocytidine-13C,15N2 Stable Isotopes CS-T-95688 66335-38-4 (Unlabelled) Enquire
5-Aza-2’-deoxy Cytidine-15N4 Stable Isotopes CS-T-95799 2353-33-5 (unlabeled) Enquire
5-Aza-2'-deoxy Cytidine-15N4 5'-Monophosphate Stable Isotopes CS-T-96636 Not Available Enquire
5-Azacytidine-15N4 Stable Isotopes CS-T-96638 320-67-2 (Unlabelled) Enquire
5-Azacytidine-15N4 5'-Monophosphate Stable Isotopes CS-T-96637 2226-72-4 (Unlabelled) Enquire
5-Hydroxy-2’-deoxycytidine-13C,15N2 Stable Isotopes CS-T-96540 Not Available Enquire
5-Hydroxymethylcytidine-13C,D2 Stable Isotopes CS-T-101288 Not Available Enquire
5-Methyl-2’-deoxy Cytidine-13C,15N2 Stable Isotopes CS-T-102270 838-07-3(Unlabelled) Enquire
5-Methylcytidine-13CD3 Stable Isotopes CS-T-101126 2140-61-6(Unlabelled) Enquire
5-Methylcytidine-13CD3 5'-Triphosphate Trisodium Salt Stable Isotopes CS-T-101125 Not Available Enquire
6-Amino-5-azacytidine-15N3 Stable Isotopes CS-T-96653 Not Available Enquire
Beta-D-N4-Hydroxycytidine-d2 Stable Isotopes CS-O-39173 1955549-12-8 In Stock
Cytidine 5’-Diphosphate Ethanolamine-d4 Stable Isotopes CS-T-96616 Not Available Enquire
cytidine 5'-monophospho-β-N-acetyl-D-[1,2,3-13C3]neuraminic ... Stable Isotopes CS-OC-00271 37399-47-6(Free base)(Unlabelled) Enquire
Cytidine- 5'-triphosphate -1',2',3',4',5'-13C5 Triethylamine... Stable Isotopes CS-T-103054 200258-75-9(Freebase) Enquire
CYTIDINE RIBOSE-2-13C Stable Isotopes CS-R-00293 478511-19-2 Enquire
CYTIDINE RIBOSE-5,5-D2 Stable Isotopes CS-R-00294 478511-21-6 Enquire
Cytidine-1',2',3',4',5'-13C5 Stable Isotopes CS-T-95684 159496-15-8 Enquire
Cytidine-1’-13C Stable Isotopes CS-T-73935 201996-57-8 Enquire
Cytidine-13C5 5'-Monophosphate Triethylammonium Salt Stable Isotopes CS-T-96615 Not Available Enquire
Cytidine-13C9,15N3 5′-triphosphate sodium Stable Isotopes CS-O-53275 ---- Enquire
Cytidine-5',5''-d2 Stable Isotopes CS-T-96617 Not Available Enquire
N4-Hydroxycytidine-13C,15N2 Stable Isotopes CS-O-40149 3258-02-4 (Unlabelled) In Stock
O-TBS 2'-Deoxy-N-methyl-cytidine-d3 Stable Isotopes CS-T-102544 Not Available Enquire
β-D -N4 -Hydroxycytidine 13C5 Stable Isotopes CS-O-40140 1955549-11-7 Enquire
2’-Deoxy Cytidine-2’,2’-d2 Stable Isotopes CS-T-73253 114218-03-0 Enquire
2’-Deoxy Cytidine-5,6-d2 Stable Isotopes CS-T-73417 1186526-91-9 Enquire
2’-Deoxy Cytidine-5-d1 Stable Isotopes CS-T-73756 25352-61-8 Enquire
2’-Deoxy-3’,5’-di-O-benzoyl-2’,2’-difluorocytidine-13C,15N2 Stable Isotopes CS-T-73865 1267650-42-9 Enquire
2'-Deoxycytidine 13C,15N3 Stable Isotopes CS-EK-01273 951-77-9 unlabeled Enquire
2-DEOXYCYTIDINE 5-MONOPHOSPHATE 15N3 Stable Isotopes CS-R-00233 1032-65-1(Unlabeled) Enquire
2-DEOXYCYTIDINE H2O (RIBOSE-1-13C) Stable Isotopes CS-R-00240 207121-53-7 (Unlabeled) Enquire
2-DEOXYCYTIDINE PHOSPHORAMIDITE 13C9, 15N3 Stable Isotopes CS-R-00237 Not Available Enquire
2-DEOXYCYTIDINE PHOSPHORAMIDITE 15N3 Stable Isotopes CS-R-00238 Not Available Enquire
2'-Deoxycytidine-13C9, 15N3 5'-triphosphate sodium Stable Isotopes CS-O-53278 ---- Enquire
2'-DEOXYCYTIDINE-13C9,15N3 5'-MONOPHOSPHATE Stable Isotopes CS-O-53288 2030184-95-1 Enquire
5'-Deoxy-5-fluorocytidine 13C5 Stable Isotopes CS-EK-00608 66335-38-4 unlabeled Enquire
5-Methyl-2-deoxy Cytidine-d3 Stable Isotopes CS-T-58082 1160707-78-7 Enquire
Azacytidine 13C5 Stable Isotopes CS-O-03615 320-67-2(Unlabeled) Enquire
CYTIDINE 5-MONOPHOSPHATE 13C9, 15N3 Stable Isotopes CS-R-00295 202406-68-6 Enquire
CYTIDINE 5-MONOPHOSPHATE 15N3 Stable Isotopes CS-R-00296 204523-17-1 Enquire
CYTIDINE RIBOSE-13C5 Stable Isotopes CS-R-00292 159496-15-8 Enquire
CYTIDINE-13C9-5'-TRIPHOSPHATE, SODIUM Stable Isotopes CS-O-53297 ---- Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
5-Azacytidine API CS-O-10043 320-67-2 In Stock
Cytidine API CS-EK-02280 65-46-3 In Stock
Cytidine 5'-Monophosphate Disodium API CS-CA-00206 6757-06-8 In Stock
2-Deoxycytidine hydrate(1:1) API CS-DV-01679 207121-53-7 Enquire
3’-Deoxycytidine API CS-T-73145 7057-33-2 Enquire
Cytidine Diphosphate Ethanolamine API CS-AD-00772 3036-18-8 Enquire
Cytidine Sulfate API CS-DE-00076 32747-18-5 Enquire
Isocytidine API CS-T-56801 489-59-8 Enquire
Pseudoisocytidine API CS-MM-88615 57100-18-2 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2'-Deoxycytidine Metabolite CS-EK-01142 951-77-9 In Stock
5′-Deoxy-5-fluorocytidine Metabolite CS-O-03395 66335-38-4 In Stock
6-oxocytidine Metabolite CS-AD-00719 150439-90-0 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2',3'-di-O-acetyl-5'-deoxy-5-fluoro-N4-(n-dipentyloxy carbon... Impurity CS-O-57783 ---- Enquire
2',3'-Di-O-acetyl-5'-deoxy-5-fluoro-N4-(pentoxycarbonxyl)cyt... Impurity CS-T-52379 162204-20-8 In Stock
2',3'-Isopropylidenecytidine Sulfate Impurity CS-EO-03706 1955522-00-5 Enquire
2',3'-O-(1-Methylethylidene)Cytidine 5'-(2-Methylpropanoate) Impurity CS-O-40086 1686124-74-2 In Stock
5-Deoxy-5-Fluoro-N4-(methoxy carbonyl)Cytidine Impurity CS-O-57687 ---- Enquire
5-Fluoro-N-[(pentyloxy)carbonyl]cytidine Impurity CS-O-48859 396684-42-7 Enquire
Beta-d-N4-hydroxycytidine Impurity CS-O-38588 3258-02-4 In Stock
Cytidine 2'-monophosphate Impurity CS-O-60595 81487-28-7 Enquire
Cytidine 3'-monophosphate Impurity CS-O-60594 84-52-6 Enquire
Cytidine-5’-dihydrogenphosphate Impurity CS-ED-41619 Not Available Enquire
Cytidine-5-Monophospahte Methyl Ester Sodium salt Impurity CS-EO-03606 52448-10-9 (Freebase) Enquire
P1-Cytidine-5'-P4-Uridine-5'-Tetraphosphate Tetrasodium Impurity CS-O-59712 401618-90-4 Enquire
(-)-ß-D-Dioxolane-5-fluoro Cytidine Impurity CS-T-20834 145397-26-8 Enquire
2' 2'-difluoro-2'-deoxycytidine 5 triphosphate Impurity CS-O-40684 1062136-15-5 Enquire
2,3-Di-O-(tert-butyldimethylsilyl)-2-deoxycytidine Impurity CS-T-52544 51549-29-2 Enquire
2',3'-O-Isopropylidenecytidine Impurity CS-O-39215 362-42-5 Enquire
2,3-O-sulphinyl cytidine Impurity CS-O-37729 55628-10-9 Enquire
2’-Deoxy-5-formyl-cytidine Impurity CS-T-73545 137017-45-9 Enquire
2’-Deoxy-N-methyl-cytidine Impurity CS-T-73348 22882-02-6 Enquire
2'-C-Methyl Cytidine Impurity CS-T-58063 20724-73-6 Enquire
2'-O-Methyl Cytidine Impurity CS-T-58062 2140-72-9 Enquire
2-Thio-2'-deoxy Cytidine Impurity CS-T-62014 169557-13-5 Enquire
3',5'-O-(1,1,3,3-Tetraisopropyl-1,3-disiloxanediyl)cytidine Impurity CS-N-00280 69304-42-3 Enquire
3-Methyl Cytidine Methosulfate Impurity CS-T-58064 21028-20-6 Enquire
3'-O-Acetyl-2'-deoxycytidine Impurity CS-N-00122 72560-69-1 Enquire
3'-tert-Butyldimethylsilyl-2'-deoxycytidine Impurity CS-T-50114 51549-28-1 Enquire
4’-C-(Chloromethyl)-2’-deoxy-2’-fluoro-cytidine 3’,5’-Bis(2-... Impurity CS-T-72253 1445383-02-3 Enquire
5,6-Dihydro-5-aza-2’-deoxycytidine Impurity CS-T-90816 114522-16-6 Enquire
5-[(2-Cyanoethoxy)methyl]-2’-deoxycytidine Impurity CS-T-90500 188411-05-4 Enquire
5-Azacytidine 5'-Diphosphate Impurity CS-T-48437 2226-73-5 Enquire
5'-Deoxy-5-fluoro-N4-(2-methyl-1-butyloxy-carbonyl)cytidine ... Impurity CS-O-36315 Not Available Enquire
5-Ethynyl-2'-deoxycytidine Impurity CS-T-54618 69075-47-4 Enquire
5-lodo-2-deoxycytidine Impurity CS-DF-00090 611-53-0 Enquire
5-Methyl-2-deoxy Cytidine Impurity CS-T-33543 838-07-3 Enquire
5-Methylcytidine-5'-triphosphate sodium salt Impurity CS-T-93916 327174-86-7 Enquire
5-O-(4,4-DIMETHOXYTRITYL)-N4-BENZOYL-5-METHYL-2-DEOXYCYTIDIN... Impurity CS-DL-00113 104579-03-5 Enquire
5-Tosyl-2-deoxy Cytidine Impurity CS-T-62157 27999-55-9 Enquire
Cytarabine Impurity 19 Impurity CS-P-08848 13913-16-1 Enquire
Cytidine 5′-Monophosphate Methyl Ester Impurity CS-O-16831 Not Available Enquire
CYTIDINE TETRAACETATE Impurity CS-ED-02089 5040-18-6 Enquire
Cytidine-4-amino-analogue Impurity CS-O-42017 Not Available Enquire
Cytidine-N3-analogue Impurity CS-O-42016 1195711-14-8 Enquire
N4 Hydroxycytidine triphosphate Impurity CS-ED-02203 34973-27-8 Enquire
N4-Acetyl-2'-deoxy-5'-O-DMT-cytidine Impurity CS-N-00119 100898-63-3 Enquire
N4-Acetyl-2'-deoxycytidine Impurity CS-N-00121 32909-05-0 Enquire
N4-Acetyl-2'-O-methylcytidine Impurity CS-N-00123 113886-71-8 Enquire
N4-Acetyl-5'-O-DMT-2'-O-methylcytidine Impurity CS-N-00130 199593-08-3 Enquire
N4-Benzoyl-2’,3’-dideoxy-3’-tritylaminocytidine-5’-O-N,N-dii... Impurity CS-O-43489 195375-65-6 Enquire
N4-Benzoyl-2’-deoxy-5'-O-dimethoxytritylcytidine-3’-O-N,N-di... Impurity CS-O-43490 102212-98-6 Enquire
N4-Benzoyl-3,5-O-(1,1,3,3-tetraisopropyl-1,3-disiloxanediyl)... Impurity CS-DE-00075 69304-43-4 Enquire
Sofosbuvir Benzoyl Cytidine Impurity CS-O-32142 817204-32-3 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,3-Di-O-acetyl-5-deoxy-5-fluorocytidine Intermediate CS-T-52376 161599-46-8 In Stock
2'-Deoxy-3',5'-di-O-benzoyl-2',2'-difluorocytidine Intermediate CS-T-51936 134790-39-9 In Stock
5-Methylcytidine Intermediate CS-T-58069 2140-61-6 In Stock
6-Amino-5-azacytidine Intermediate CS-T-47733 105331-00-8 In Stock
Cytidine 3(2)-Monophosphate Intermediate CS-T-51555 1217470-60-4 Enquire
Cytidine Diphosphate Ethanolamine Intermediate CS-P-00892 3036-18-8 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,3-Dideoxycytidine Fine Chemicals CS-O-01403 7481-89-2 In Stock
2-Thiocytidine Fine Chemicals CS-N-00290 13239-97-9 Enquire
5-Aza-4'-thio-2'-deoxycytidine Fine Chemicals CS-ED-02122 169514-76-5 Enquire
5-Chlorocytidine Fine Chemicals CS-T-50617 25130-29-4 Enquire
Cytidine 5-(trihydrogen diphosphate) Fine Chemicals CS-MM-12727 63-38-7 Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2?-0-Methylcytidine Secondary Standards CS-SS-26282-100MG 2140-72-9 Enquire
5-Methylcytidine Secondary Standards CS-SS-26283-100MG Not Available Enquire
Cytidine Secondary Standards CS-SS-26280-100MG 65-46-3 Enquire
Deoxycytidine Secondary Standards CS-SS-26281-50MG 951-77-9 Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N4-Acetylcytidine-13C5 Stable Isotope Reagent CS-T-95751 3768-18-1(Unlabelled) Enquire
Cytidine-5,6-d2 Stable Isotope Reagent CS-C-00980 40632-25-5 Enquire


Pharmaceutical Stds.

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3',4'-Didehydro-3'-deoxycytidine Pharmaceutical Stds. CS-TB-20403 386264-46-6 Enquire


Heterocyclic

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cytidine-5'-monophospho-N-acetylneuraminic acid sodium salt Heterocyclic CS-O-43713 3063-71-6 Enquire


Biochemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cytidine-5-Monophosphate (5-CMP) 99% Biochemicals CS-SR-00279 63-37-6 Enquire
Cytidine-5-Triphosphate Disodium Salt (5-CTP-Na2) 97% Biochemicals CS-SR-00280 81012-87-5 Enquire
N-Hydroxycytidine (EIDD-1931) for cell culture, 98%, Endotox... Biochemicals CS-SR-00507 3258-02-4 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2'-Deoxy-N-(4-hydroxybutyl)cytidine Building Blocks CS-TB-14116 905844-52-2 Enquire
N4,N4-Dimethylcytidine Building Blocks CS-TB-25916 13007-43-7 Enquire


Carbohydrates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2'-Deoxypseudoisocytidine Carbohydrates CS-O-60554 65358-18-1 Enquire
5-Hydroxymethylcytidine Carbohydrates CS-T-56184 19235-17-7 Enquire
N4-Benzoyl-5’-O-(4,4-dimethoxytrityl)-3’-deoxy cytidine Carbohydrates CS-O-60629 86234-45-9 Enquire
N4-Benzoyl-5'-O-DMT-2'-O-methylcytidine 3'-CE phosphoramidit... Carbohydrates CS-T-94043 163759-94-2 Enquire


Enzymes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Cytidine deaminase (EcCdd) Enzymes CS-O-50430 Not Available Enquire