Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Uracil, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Uracil 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 Uracil-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 Uracil-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.
Uracil Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1-D-Arabinofuranosyluracil-13C,15N2 2',3',5'-Tribenzoate (α,... | Stable Isotopes | CS-T-101895 | Not Available | Enquire |
| 1-ß-D-Arabinofuranosyluracil-2-C-methyl-d3, 13C | Stable Isotopes | CS-T-96645 | 1256490-38-6 | Enquire |
| 1-β-D-Arabinofuranosyluracil-13C,15N2 5'-Monophosphate | Stable Isotopes | CS-T-101896 | Not Available | Enquire |
| 5-Acetylamino-6-amino-3-methyluracil-[13C4,15N3] | Stable Isotopes | CS-I-00486 | 1173022-65-5 | Enquire |
| 5-Amino-4-D-ribitylaminouracil Dihydrochloride-13C3 (90%) | Stable Isotopes | CS-T-96651 | Not Available | Enquire |
| 5-Bromodihydrouracil-13C1, 15N2 | Stable Isotopes | CS-T-100736 | Not Available | Enquire |
| 5-Fluorouracil-13C,15N2 | Stable Isotopes | CS-P-02912 | 1189423-58-2 | In Stock |
| 5-Fluorouracil-13C,15N2 N-β-D-Glucuronide | Stable Isotopes | CS-T-98458 | Not Available | Enquire |
| 6-Amino-2-thiouracil-13C2 | Stable Isotopes | CS-T-99382 | 1330170-14-3 | Enquire |
| 6-Amino-5-nitro-2-thio-uracil-13C2,15N | Stable Isotopes | CS-T-102254 | 1330266-31-3 | Enquire |
| 6-Amino-5-nitrosouracil-13C,15N2 | Stable Isotopes | CS-T-100856 | Not Available | Enquire |
| 6-Amino-5-nitrosouracil-13C2 | Stable Isotopes | CS-T-102253 | Not Available | Enquire |
| 6-Amino-5-nitrouracil-13C3 | Stable Isotopes | CS-T-102473 | 2841166-05-8 | Enquire |
| Propylthiouracil-d5 | Stable Isotopes | CS-O-15087 | 1189423-94-6 | In Stock |
| Propylthiouracil-d5 2,3,4-Tri-O-acetyl-N-b-D-glucuronide Met... | Stable Isotopes | CS-T-98406 | Not Available | Enquire |
| Propylthiouracil-d5 N-b-D-Glucuronide Sodium Salt | Stable Isotopes | CS-T-102102 | Not Available | Enquire |
| Uracil Lyxonucleoside-13C,15N2 5'-Phosphate | Stable Isotopes | CS-T-102616 | 688301-42-0 | Enquire |
| Uracil-d4 | Stable Isotopes | CS-ED-02352 | 24897-55-0 | In Stock |
| [2-13C,15N2]-Uracil | Stable Isotopes | CS-EK-00933 | 181517-11-3 | Enquire |
| [4-13C]-Uracil | Stable Isotopes | CS-EK-01774 | 61101-07-3 | Enquire |
| 1-β-D-Arabinofuranosyluracil-13C,15N2 | Stable Isotopes | CS-T-95655 | Not Available | Enquire |
| 5,6-Diamino-2-thiouracil-13C,15N | Stable Isotopes | CS-T-88791 | 1246816-80-7 | Enquire |
| 5,6-Diamino-3-methyluracil-d3 | Stable Isotopes | CS-T-88563 | 1246816-74-9 | Enquire |
| 5,6-Diamino-4-thiouracil-13C2 | Stable Isotopes | CS-T-88412 | 1346601-57-7 | Enquire |
| 5,6-Dihydro Uracil 13C15N2 | Stable Isotopes | CS-T-53160 | 181516-96-1 | Enquire |
| 5-Acetylamino-6-Amino-3-Methyluracil 13C4, 15N2, 6-Amino-15N | Stable Isotopes | CS-BE-00022 | 19893-78-8 | Enquire |
| 5-Acetylamino-6-amino-3-methyluracil 13C4, 15N3 | Stable Isotopes | CS-EK-02283 | 19893-78-8 unlabeled | Enquire |
| 5-Acetylamino-6-amino-3-methyluracil-d3 Hydrate | Stable Isotopes | CS-T-64322 | 1246816-23-8 | Enquire |
| 5-Acetylamino-6-formylamino-3-methyl-d3-uracil | Stable Isotopes | CS-T-64391 | 1216442-68-0 | Enquire |
| 5-Acetyl-d3-amino-6-formylamino-3-methyluracil | Stable Isotopes | CS-T-47090 | 1185082-65-8 | Enquire |
| 5-Allyl-6-imino-5-(1-methyl-2-pentynyl)hydrouracil-13C,15N2 | Stable Isotopes | CS-T-98754 | Not Available | Enquire |
| 5-Chlorouracil-15N2,13C | Stable Isotopes | CS-T-72648 | 1185171-08-7 | Enquire |
| 5-FLUOROURACIL 13C4, 15N2 | Stable Isotopes | CS-R-00261 | 202407-03-2 | Enquire |
| 5-FLUOROURACIL 15N2 | Stable Isotopes | CS-R-00260 | 68941-95-7 | Enquire |
| 5-Fluorouracil-6-d1 | Stable Isotopes | CS-T-54940 | 90344-84-6 | Enquire |
| 6-Amino-2-thiouracil 13C3,15N | Stable Isotopes | CS-EK-02730 | 1004-40-6 unlabeled | Enquire |
| 6-Amino-2-thiouracil-13C Monohydrate | Stable Isotopes | CS-T-95646 | Not Available | Enquire |
| 6-Amino-5-nitroso-2-thiouracil-13C,15N | Stable Isotopes | CS-T-66321 | 1246814-68-5 | Enquire |
| Dihydrouracil 13C 15N2 | Stable Isotopes | CS-CX-00726 | 504-07-4 (Unlabeled) | Enquire |
| Eniluracil 13C,15N2 | Stable Isotopes | CS-T-54054 | 1329556-69-5 | Enquire |
| Thiouracil 13C 15N2 | Stable Isotopes | CS-Y-00088 | 141-90-2(Unlabeled) | Enquire |
| URACIL 13C | Stable Isotopes | CS-R-00358 | 35803-45-3 | Enquire |
| URACIL 15N2 | Stable Isotopes | CS-R-00356 | 5522-55-4 | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Eniluracil | API | CS-T-21653 | 59989-18-3 | Enquire |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-hydroxy Uracil | Metabolite | CS-O-06003 | 496-76-4 | In Stock |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5,6-DIHYDRO-6-METHYLURACIL | Impurity | CS-BX-01347 | 2434-49-3 | Enquire |
| 6-Hydroxy-1-Beta-D-arabinofuranosyl-hydrouracil | Impurity | CS-O-58708 | ---- | Enquire |
| Cidofovir uracil analog | Impurity | CS-O-58843 | 116558-96-4 | Enquire |
| Dihydro Uracil | Impurity | CS-T-19034 | 504-07-4 | In Stock |
| Emtricitabine 5-fluorouracil analog | Impurity | CS-O-16331 | 145986-11-4 | In Stock |
| Emtricitabine Uracil Impurity | Impurity | CS-O-59295 | 1422361-25-8 | Enquire |
| Fluorouracil Dimer Impurity | Impurity | CS-O-47900 | Not Available | Enquire |
| Fluorouracil Impurity 11 | Impurity | CS-O-45436 | Not Available | Enquire |
| Fluorouracil Impurity 17 | Impurity | CS-O-59991 | 62836-98-0 | Enquire |
| 1-(2’-Deoxy-2’-fluoro-beta-d-arabinofuranosyl)-5-ethyluracil | Impurity | CS-T-73437 | 1417190-75-0 | Enquire |
| 1,3-Bis(4-methoxybenzyl)-5-fluorouracil | Impurity | CS-T-07087 | 897304-05-1 | Enquire |
| 1,3-Di(benzyloxymethyl)-5-fluorouracil | Impurity | CS-T-52485 | 75500-03-7 | Enquire |
| 1,3-Dibenzyl-5-fluorouracil | Impurity | CS-T-52477 | 75500-02-6 | Enquire |
| 4-Thiouracil | Impurity | CS-T-86386 | 591-28-6 | Enquire |
| 5-Allyl-6-imino-5-(1-methyl-2-pentynyl)hydrouracil | Impurity | CS-T-65179 | 100705-86-0 | Enquire |
| 5-Bromodihydrouracil | Impurity | CS-T-08173 | 1193-76-6 | Enquire |
| 5-Fluoro-6-hydroxyhydro Uracil | Impurity | CS-T-24043 | 37103-91-6 | Enquire |
| 5-Iodouracil | Impurity | CS-T-29545 | 696-07-1 | Enquire |
| 6-Amino-1,3-dibutyluracil | Impurity | CS-T-02371 | 41862-16-2 | Enquire |
| 6-Amino-1-benzyl-5-methylaminouracil | Impurity | CS-T-47632 | 72816-88-7 | Enquire |
| 6-Amino-4-methoxy-2-methylthiouracil | Impurity | CS-T-02866 | 3289-53-0 | Enquire |
| 6-Amino-5-bromo-1-methyluracil | Impurity | CS-T-02023 | 14094-37-2 | Enquire |
| 6-Methyl-2-thiouracil | Impurity | CS-T-80878 | 56-04-2 | Enquire |
| Fluorouracil Impurity Mixture (Containing Impurities D and ... | Impurity | CS-EG-03459 | ---- | Enquire |
| N-nitrosamine of Chlorouracil | Impurity | CS-O-40916 | Not Available | Enquire |
| Uracil 5-carboxylic acid | Impurity | CS-DL-01041 | 59299-01-3 | Enquire |
Intermediate
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1-ß-D-Arabinofuranosyluracil | Intermediate | CS-T-48310 | 3083-77-0 | In Stock |
| 4-(3-Hydroxypropylamino)-1,3-dimethyluracil | Intermediate | CS-O-41487 | 34654-80-3 | In Stock |
| 5,6-Diamino-1,3-dimethyl Uracil | Intermediate | CS-T-16860 | 5440-00-6 | In Stock |
| 5-Methoxyuracil | Intermediate | CS-T-80468 | 6623-81-0 | In Stock |
| 6-Amino-3-methyluracil | Intermediate | CS-T-03101 | 21236-97-5 | In Stock |
| 6-Phenyl-2-thiouracil | Intermediate | CS-T-84059 | 36822-11-4 | In Stock |
Glucuronide
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Propylthiouracil-Beta-D-Glucuronide | Glucuronide | CS-T-60853 | 33987-24-5 | Enquire |
| 5-Fluorouracil-β-D-Glucuronide | Glucuronide | CS-T-54942 | 66048-45-1 | Enquire |
| 5-Fluorouracil-β-D-Glucuronide Methyl Ester, 2,3,4-Tria... | Glucuronide | CS-T-54943 | 77476-81-4 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1,3-Dimethyluracil | Fine Chemicals | CS-M-57493 | 874-14-6 | In Stock |
| 2-Thiouracil | Fine Chemicals | CS-T-44269 | 141-90-2 | In Stock |
| 5-Azauracil | Fine Chemicals | CS-T-04482 | 71-33-0 | In Stock |
| 5-Bromouracil | Fine Chemicals | CS-O-01027 | 51-20-7 | In Stock |
| 5-Chlorouracil | Fine Chemicals | CS-O-01151 | 1820-81-1 | In Stock |
| 5-Fluoro Uracil | Fine Chemicals | CS-O-30920 | 51-21-8 | In Stock |
| 6-Amino-1,3-dimethyluracil | Fine Chemicals | CS-T-65494 | 6642-31-5 | In Stock |
| 6-Chlorouracil | Fine Chemicals | CS-T-12750 | 4270-27-3 | Enquire |
| Propylthiouracil | Fine Chemicals | CS-T-40828 | 51-52-5 | In Stock |
| Uracil | Fine Chemicals | CS-T-46139 | 66-22-8 | In Stock |
| 2-Methylthio Uracil | Fine Chemicals | CS-T-82662 | 5751-20-2 | Enquire |
| 5,6-Diaminouracil Sulfate | Fine Chemicals | CS-T-16948 | 42965-55-9 | Enquire |
| 5-Cyanouracil | Fine Chemicals | CS-T-73994 | 4425-56-3 | Enquire |
| 5-Vinyluracil | Fine Chemicals | CS-T-62737 | 37107-81-6 | Enquire |
| 6-(hydroxymethyl)-5-hydroxyuracil | Fine Chemicals | CS-O-36053 | 80029-06-7 | Enquire |
| 6-Chloro-3-methyluracil | Fine Chemicals | CS-M-03133 | 4318-56-3 | Enquire |
Nitrosamine
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 4-(3-Hydroxypropyl N-Nitrosamine)-1,3-dimethyluracil | Nitrosamine | CS-O-52401 | ---- | Enquire |
| 6-Amino-1-methyl-5-nitrosouracil | Nitrosamine | CS-T-65471 | 6972-78-7 | In Stock |
| 6-Amino-5-nitroso-3-methyluracil | Nitrosamine | CS-T-47962 | 61033-04-3 | Enquire |
| 4-Amino-1,3-dimethyl-5-nitrosouracil | Nitrosamine | CS-T-93963 | 6632-68-4 | Enquire |
| 6-Amino-1,3-dimethyl-5-nitrosouracil | Nitrosamine | CS-T-02491 | 3346-61-0 | Enquire |
| 6-Amino-5-nitroso-2-thiouracil | Nitrosamine | CS-T-03139 | 1672-48-6 | Enquire |
| 6-Amino-5-nitrosouracil | Nitrosamine | CS-T-03153 | 5442-24-0 | Enquire |
| N-nitroso Propylthiouracil | Nitrosamine | CS-O-39071 | Not Available | Enquire |
Secondary Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5,6-Diamino-1,3-dimethyluracil | Secondary Standards | CS-SS-25398-100MG | Not Available | Enquire |
| Fluorouracil | Secondary Standards | CS-SS-24248-500MG | 51-21-8 | Enquire |
| Fluorouracil Related Compound B | Secondary Standards | CS-SS-25614-50MG | 496-76-4 | Enquire |
| Fluorouracil Related Compound E | Secondary Standards | CS-SS-25615-50MG | 1820-81-1 | Enquire |
| Fluorouracil Related Compound F | Secondary Standards | CS-SS-25616-50MG | 56177-80-1 | Enquire |
| Propylthiouracil | Secondary Standards | CS-SS-25422-500MG | 51-52-5 | Enquire |
| Uracil | Secondary Standards | CS-SS-24554-100MG | 66-22-8 | Enquire |
| Uracil Arabinoside | Secondary Standards | CS-SS-25950-100MG | 3083-77-0 | Enquire |
Stable Isotope Reagent
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-Methyluracil-d8 | Stable Isotope Reagent | CS-T-103737 | 2376506-60-2 | Enquire |
| 4-Amino-5-[(ethoxycarbonyl)amino]-1-methyl-d3 Uracil | Stable Isotope Reagent | CS-T-65672 | 1794768-19-6 | Enquire |
| 5-(Hydroxymethyl-d2)uracil-6-d1 | Stable Isotope Reagent | CS-C-00933 | 352438-73-4 | Enquire |
| 5,6-Dihydrouracil D4 | Stable Isotope Reagent | CS-C-00377 | 334473-41-5 | Enquire |
| 6-Amino-2-thiouracil-13C | Stable Isotope Reagent | CS-T-66420 | 1246816-15-8 | Enquire |
| 6-Amino-3-methyluracil-d3 | Stable Isotope Reagent | CS-T-66456 | 1246820-43-8 | Enquire |
| 6-Amino-5-nitroso-3-methyluracil-d3 | Stable Isotope Reagent | CS-T-66292 | 1246819-56-6 | Enquire |
| Uracil-[5,6-d2] | Stable Isotope Reagent | CS-O-41045 | 24897-52-7 | Enquire |
| Uracil-1,3-d2 | Stable Isotope Reagent | CS-C-01459 | 20666-60-8 | Enquire |
| Uracil-5-d1 | Stable Isotope Reagent | CS-C-00726 | 24897-50-5 | Enquire |
| Uracil-6-d1 | Stable Isotope Reagent | CS-O-41046 | 24897-51-6 | Enquire |
Biochemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Thiouracil 98% | Biochemicals | CS-SR-00452 | 141-90-2 | Enquire |
| Uracil 99% | Biochemicals | CS-SR-00463 | 66-22-8 | Enquire |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-(Trifluoromethyl)uracil | Building Blocks | CS-M-02415 | 54-20-6 | In Stock |
| 5-Propyl-2-thiouracil | Building Blocks | CS-O-43432 | 2954-52-1 | Enquire |
| 6-(Trifluoromethyl)uracil | Building Blocks | CS-M-04580 | 672-45-7 | Enquire |
| 6-Amino-1,3-dipropyl-5-nitrosouracil | Building Blocks | CS-T-02522 | 81250-33-1 | Enquire |