Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Cytosine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Cytosine 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 Cytosine-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.
Our Cytosine-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.
Cytosine Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Deoxy-D-β-ribopyranosyl-5-azacytosine-15N4 | Stable Isotopes | CS-T-100540 | Not Available | Enquire |
| 5-(Hydroxymethyl)cytosine-d2,13C | Stable Isotopes | CS-T-100199 | Not Available | Enquire |
| 5-Aza Cytosine-15N4 | Stable Isotopes | CS-T-95798 | 1189895-68-8 | Enquire |
| 5-Azacytosine 13C,15N2 | Stable Isotopes | CS-T-51561 | 931-86-2 (Unlabelled) | Enquire |
| 5-Carboxycytosine-13C,15N2 | Stable Isotopes | CS-T-100685 | Not Available | Enquire |
| 5-Fluoro Cytosine-13C,15N2 | Stable Isotopes | CS-O-11263 | 1216616-31-7 | Enquire |
| 5-Fluoro Cytosine-13C,15N2 O-β-D-Glucuronide | Stable Isotopes | CS-T-98459 | Not Available | Enquire |
| 5-Formylcytosine-13C,15N2 | Stable Isotopes | CS-T-100284 | Not Available | Enquire |
| 5-Hydroxycytosine-13C, 15N2 | Stable Isotopes | CS-T-79233 | 181516-92-7 | Enquire |
| 5-Methyl Cytosine-13C,15N2 Hydrochloride | Stable Isotopes | CS-T-80070 | 1246815-59-7 | Enquire |
| 5-Methyl-d3-cytosine-6-d1 | Stable Isotopes | CS-C-01043 | 554-01-8 | Enquire |
| Cytosine-13C,15N2 | Stable Isotopes | CS-T-95685 | 181517-10-2 | In Stock |
| Cytosine-5,6-d2 | Stable Isotopes | CS-T-94776 | 106391-24-6 | Enquire |
| Cytosine-amino-15N | Stable Isotopes | CS-O-39894 | 3920-45-4 | Enquire |
| Flucytosine15NH2 | Stable Isotopes | CS-O-46790 | Not Available | Enquire |
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-Fluoro Cytosine | API Standards | CS-O-04356 | 2022-85-7 | Enquire |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Deoxy-D-β-ribopyranosyl-5-azacytosine | Impurities | CS-T-73472 | 157771-78-3 | Enquire |
| 5-azacytosine dipentose | Impurities | CS-O-35888 | 2306050-23-5 | Enquire |
| 5-Methyl Cytosine Hydrochloride | Impurities | CS-T-80226 | 58366-64-6 | Enquire |
| 6-methyl-5-azacytosine pentose | Impurities | CS-O-35889 | 105330-94-7 | Enquire |
| Flucytosine Imp at RRT 0.7 | Impurities | CS-O-47894 | Not Available | Enquire |
| Gemcitabine Cytosine | Impurities | CS-DN-00011 | Not Available | Enquire |
| Iso Cytosine | Impurities | CS-T-29710 | 108-53-2 | Enquire |
| Lamivudine Carboxylic Impurity | Impurities | CS-O-36296 | 2166343-24-2 | Enquire |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1-(2'-Chloro-2'-deoxy-β-D-arabinofuranosyl)cytosine | Intermediates | CS-N-00141 | 58461-30-6 | Enquire |
| 1beta-D-Arabinofuranosyl-5-methylcytosine | Intermediates | CS-ED-11610 | 6829-31-8 | Enquire |
| 1-Methylcytosine | Intermediates | CS-ED-12109 | 1122-47-0 | Enquire |
| 2,4-Dichloro-5-fluoropyrimidine | Intermediates | CS-M-07582 | 2927-71-1 | Enquire |
| 5-(Hydroxymethyl)cytosine | Intermediates | CS-T-27679 | 1123-95-1 | Enquire |
| 5-CHLOROCYTOSINE | Intermediates | CS-DL-00200 | 2347-43-5 | Enquire |
| 5-Hydroxycytosine | Intermediates | CS-T-26946 | 13484-95-2 | Enquire |
| 5-Iodocytosine | Intermediates | CS-ED-05833 | 1122-44-7 | Enquire |
| 5-Methylisocytosine | Intermediates | CS-ED-10312 | 15981-91-6 | Enquire |
| 6-Chlorocytosine | Intermediates | CS-ED-04910 | 3289-35-8 | Enquire |
| Cyclopentenylcytosine | Intermediates | CS-T-73700 | 90597-22-1 | Enquire |
| Cytosine beta-D-Arabinofuranoside Hydrochloride | Intermediates | CS-T-73746 | 69-74-9 | Enquire |
| N4-Acetylcytosine | Intermediates | CS-DE-00937 | 14631-20-0 | In Stock |
Glucuronides
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-Fluoro Cytosine O-β-D-Glucuronide | Glucuronides | CS-T-77118 | 150494-26-1 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-Azacytosine | Fine Chemicals | CS-O-00881 | 931-86-2 | In Stock |
| 5-Formylcytosine | Fine Chemicals | CS-T-77473 | 4425-59-6 | Enquire |
| N4-Benzoylcytosine | Fine Chemicals | CS-O-11262 | 26661-13-2 | In Stock |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Cytosine | Building Blocks | CS-O-01189 | 71-30-7 | In Stock |
| Cytosine arabinoside 5'-triphosphate | Building Blocks | CS-ED-41854 | 13191-15-6 | Enquire |