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 |
|---|---|---|---|---|
| "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-Dihydro Uracil 13C15N2" | Stable Isotopes | CS-T-53160 | 181516-96-1 | Enquire |
| "5-Acetylamino-6-Amino-3-Methyluracil 13C4, 15N2, 6-Amino-15... | Stable Isotopes | CS-BE-00022 | 19893-78-8 | 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 |
| "6-Amino-5-nitroso-2-thiouracil-13C,15N" | Stable Isotopes | CS-T-66321 | 1246814-68-5 | Enquire |
| "Eniluracil 13C,15N2" | Stable Isotopes | CS-T-54054 | 1329556-69-5 | Enquire |
| [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-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 |
| 4-Amino-5-[(ethoxycarbonyl)amino]-1-methyl-d3 Uracil | Stable Isotopes | CS-T-65672 | 1794768-19-6 | Enquire |
| 5,6-Diamino-4-thiouracil-13C2 | Stable Isotopes | CS-T-88412 | 1346601-57-7 | Enquire |
| 5,6-Dihydrouracil D4 | Stable Isotopes | CS-C-00377 | 334473-41-5 | 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-[13C4,15N3] | Stable Isotopes | CS-I-00486 | 1173022-65-5 | 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-Bromodihydrouracil-13C1, 15N2 | Stable Isotopes | CS-T-100736 | Not Available | Enquire |
| 5-FLUOROURACIL 15N2 | Stable Isotopes | CS-R-00260 | 68941-95-7 | Enquire |
| 5-Fluorouracil-13C | 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 |
| 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 | Stable Isotopes | CS-T-66420 | 1246816-15-8 | Enquire |
| 6-Amino-3-methyluracil-d3 | Stable Isotopes | CS-T-66456 | 1246820-43-8 | Enquire |
| 6-Amino-5-nitro-2-thio-uracil-13C2,15N | Stable Isotopes | CS-T-102254 | 1330266-31-3 | Enquire |
| 6-Amino-5-nitroso-3-methyluracil-d3 | Stable Isotopes | CS-T-66292 | 1246819-56-6 | Enquire |
| 6-Amino-5-nitrosouracil-13C2 | Stable Isotopes | CS-T-102253 | Not Available | Enquire |
| Dihydrouracil 13C 15N2 | Stable Isotopes | CS-CX-00726 | 504-07-4 (Unlabeled) | 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 |
| 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 |
| Uracil Lyxonucleoside-13C,15N2 5'-Phosphate | Stable Isotopes | CS-T-102616 | 688301-42-0 | Enquire |
| Uracil-5-d1 | Stable Isotopes | CS-C-00726 | 24897-50-5 | Enquire |
| Uracil-d4 | Stable Isotopes | CS-ED-02352 | 24897-55-0 | In Stock |
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Eniluracil | API Standards | CS-T-21653 | 59989-18-3 | Enquire |
Metabolites
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 5-hydroxy Uracil | Metabolites | CS-O-06003 | 496-76-4 | In Stock |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "1,3-Bis(4-methoxybenzyl)-5-fluorouracil" | Impurities | CS-T-07087 | 897304-05-1 | Enquire |
| "1,3-Di(benzyloxymethyl)-5-fluorouracil" | Impurities | CS-T-52485 | 75500-03-7 | Enquire |
| "1,3-Dibenzyl-5-fluorouracil" | Impurities | CS-T-52477 | 75500-02-6 | Enquire |
| "6-Amino-1,3-dibutyluracil" | Impurities | CS-T-02371 | 41862-16-2 | Enquire |
| 1-(2’-Deoxy-2’-fluoro-beta-d-arabinofuranosyl)-5-ethyluracil | Impurities | CS-T-73437 | 1417190-75-0 | Enquire |
| 4-Amino-1,3-dimethyl-5-nitrosouracil | Impurities | CS-T-93963 | 6632-68-4 | Enquire |
| 4-Thiouracil | Impurities | CS-T-86386 | 591-28-6 | Enquire |
| 5,6-DIHYDRO-6-METHYLURACIL | Impurities | CS-BX-01347 | 2434-49-3 | Enquire |
| 5-Allyl-6-imino-5-(1-methyl-2-pentynyl)hydrouracil | Impurities | CS-T-65179 | 100705-86-0 | Enquire |
| 5-Bromodihydrouracil | Impurities | CS-T-08173 | 1193-76-6 | Enquire |
| 5-Fluoro-6-hydroxyhydro Uracil | Impurities | CS-T-24043 | 37103-91-6 | Enquire |
| 5-Iodouracil | Impurities | CS-T-29545 | 696-07-1 | Enquire |
| 6-Amino-1,3-dimethyl-5-nitrosouracil | Impurities | CS-T-02491 | 3346-61-0 | Enquire |
| 6-Amino-1,3-dipropyl-5-nitrosouracil | Impurities | CS-T-02522 | 81250-33-1 | Enquire |
| 6-Amino-1-benzyl-5-methylaminouracil | Impurities | CS-T-47632 | 72816-88-7 | Enquire |
| 6-Amino-4-methoxy-2-methylthiouracil | Impurities | CS-T-02866 | 3289-53-0 | Enquire |
| 6-Amino-5-bromo-1-methyluracil | Impurities | CS-T-02023 | 14094-37-2 | Enquire |
| 6-Amino-5-nitroso-2-thiouracil | Impurities | CS-T-03139 | 1672-48-6 | Enquire |
| 6-Amino-5-nitroso-3-methyluracil | Impurities | CS-T-47962 | 61033-04-3 | Enquire |
| 6-Amino-5-nitrosouracil | Impurities | CS-T-03153 | 5442-24-0 | Enquire |
| 6-Hydroxy-1-Beta-D-arabinofuranosyl-hydrouracil | Impurities | CS-O-58708 | Not Available | Enquire |
| 6-Methyl-2-thiouracil | Impurities | CS-T-80878 | 56-04-2 | Enquire |
| Cidofovir uracil analog | Impurities | CS-O-58843 | 116558-96-4 | Enquire |
| Dihydro Uracil | Impurities | CS-T-19034 | 504-07-4 | In Stock |
| Emtricitabine 5-fluorouracil analog | Impurities | CS-O-16331 | 145986-11-4 | In Stock |
| Emtricitabine Uracil Impurity | Impurities | CS-O-59295 | 1422361-25-8 | Enquire |
| Fluorouracil Dimer Impurity | Impurities | CS-O-47900 | Not Available | Enquire |
| Fluorouracil Impurity 11 | Impurities | CS-O-45436 | Not Available | Enquire |
| Fluorouracil Impurity 17 | Impurities | CS-O-59991 | 62836-98-0 | Enquire |
| Uracil 5-carboxylic acid | Impurities | CS-DL-01041 | 59299-01-3 | Enquire |
EP Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Propylthiouracil (P3700000) | EP Standards | CS-EG-00664 | 51-52-5 | Enquire |
| Uracil arabinoside (U0100000) | EP Standards | CS-EG-01721 | 3083-77-0 | Enquire |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "1,3-Dibutyl-5,6-diaminouracil" | Intermediates | CS-T-17355 | 52998-23-9 | Enquire |
| "1,3-Dimethyluracil-5-boronic acid pinacol ester" | Intermediates | CS-AC-06623 | 269410-01-7 | Enquire |
| "1,3-Dimethyluracil-5-carboxaldehyde" | Intermediates | CS-AC-01621 | 4869-46-9 | Enquire |
| "1,3-Dimethyluracil-5-trifluoroborate potassium salt" | Intermediates | CS-AC-12004 | 1150654-77-5 | Enquire |
| "5,6-Diamino-1,3-dimethyl Uracil" | Intermediates | CS-T-16860 | 5440-00-6 | In Stock |
| "5,6-Diamino-2-thiouracil" | Intermediates | CS-T-16954 | 1004-76-8 | Enquire |
| "5,6-Diamino-4-thiouracil" | Intermediates | CS-T-16962 | 40848-33-7 | Enquire |
| "5-Tributylstannyl-1,3-dimethyluracil" | Intermediates | CS-M-52816 | 103408-63-5 | Enquire |
| "6-(N-Methyl-3,4-xylidino)uracil" | Intermediates | CS-T-35542 | 36995-89-8 | Enquire |
| "6-Amino-1,3-dipropyluracil" | Intermediates | CS-T-02523 | 41862-14-0 | Enquire |
| "6-Amino-5-[(cyclopentanecarbonyl)amino]-1,3-dimethyl Uracil... | Intermediates | CS-T-02236 | 887352-43-4 | Enquire |
| (E)-5-(2-Bromovinyl)uracil | Intermediates | CS-T-09046 | 69304-49-0 | Enquire |
| (E)-5-(2-Carboxvinyl)uracil | Intermediates | CS-T-10544 | 57412-59-6 | Enquire |
| 1-(α-D-ribofuranosyl)uracil | Intermediates | CS-CA-00171 | 3258-07-9 | Enquire |
| 1,3-Diethyl-5-nitroso-6-aminouracil | Intermediates | CS-T-18229 | 89073-60-9 | Enquire |
| 1-Allyl-6-aminouracil | Intermediates | CS-ED-41174 | 4852-21-5 | Enquire |
| 1-Ethyl-6-aminouracil | Intermediates | CS-T-22493 | 41862-09-3 | Enquire |
| 1-N-Acetyluracil | Intermediates | CS-ED-39593 | 40338-28-1 | Enquire |
| 1-ß-D-Arabinofuranosyluracil | Intermediates | CS-T-48310 | 3083-77-0 | In Stock |
| 2’-Fluoro-5-methyl-1-ß-D-arabinofuranosyluracil | Intermediates | CS-T-77512 | 69256-17-3 | Enquire |
| 2-THIOURACIL-5-CARBOXYLIC ACID | Intermediates | CS-DL-00203 | 23945-50-8 | Enquire |
| 3-(Uracil-1-yl)pyrrolidine | Intermediates | CS-ED-32891 | 898908-30-0 | Enquire |
| 3-Allyl-6-amino-1-ethyluracil | Intermediates | CS-T-01650 | 63981-29-3 | Enquire |
| 4-(3-Hydroxypropylamino)-1,3-dimethyluracil | Intermediates | CS-O-41487 | 34654-80-3 | In Stock |
| 5-(Benzyloxy)-2-thiouracil | Intermediates | CS-T-49035 | 63204-39-7 | Enquire |
| 5,6-Diamino-1,3-dipropyluracil | Intermediates | CS-T-16871 | 81250-34-2 | Enquire |
| 5,6-Diaminouracil | Intermediates | CS-M-57521 | 32014-70-3 | Enquire |
| 5-Acetylamino-6-amino-3-methyluracil Hydrate | Intermediates | CS-T-64563 | 1196153-01-1 | Enquire |
| 5-Acetylamino-6-formylamino-3-methyluracil | Intermediates | CS-T-47089 | 85438-96-6 | Enquire |
| 5-Allyl-6-methyl-2-thiouracil | Intermediates | CS-ED-40326 | 102613-14-9 | Enquire |
| 5-amino-6-(5-phospho-D-ribitylamino)uracil | Intermediates | CS-ED-11625 | 71491-01-5 | Enquire |
| 5-Amino-6-(D-ribitylamino)uracil | Intermediates | CS-T-93520 | 17014-74-3 | Enquire |
| 5-Aminouracil | Intermediates | CS-AM-00075 | 932-52-5 | Enquire |
| 5-Cyano-1-[3-(trifluoromethyl)phenyl]uracil | Intermediates | CS-M-00314 | 75838-24-3 | Enquire |
| 5-Ethyluracil | Intermediates | CS-AC-12317 | 4212-49-1 | Enquire |
| 5-Formyl Uracil | Intermediates | CS-T-24776 | 1195-08-0 | Enquire |
| 5-Hydroxymethyluracil | Intermediates | CS-T-28014 | 4433-40-3 | Enquire |
| 5-Methoxyuracil | Intermediates | CS-T-80468 | 6623-81-0 | In Stock |
| 5-Nitrouracil | Intermediates | CS-T-37342 | 611-08-5 | Enquire |
| 6-(Chloromethyl)uracil | Intermediates | CS-EL-03245 | 18592-13-7 | Enquire |
| 6-(Hydroxymethyl)-2-thiouracil | Intermediates | CS-EL-29935 | 31555-11-0 | Enquire |
| 6-?Phenyl-?2-?thiouracil | Intermediates | CS-T-84059 | 36822-11-4 | In Stock |
| 6-Amino-1,3-dimethyluracil | Intermediates | CS-AM-00077 | 6642-31-5 | Enquire |
| 6-Amino-1-benzyl-3-methyl-5-(N-formyl-N-methyl)uracil | Intermediates | CS-T-01972 | 72816-91-2 | Enquire |
| 6-Amino-1-benzyl-5-(N-formyl-N-methyl)uracil | Intermediates | CS-T-01969 | 72816-89-8 | Enquire |
| 6-Amino-1-benzyl-5-bromouracil | Intermediates | CS-T-01964 | 72816-87-6 | Enquire |
| 6-Amino-1-benzyluracil | Intermediates | CS-T-02002 | 41862-11-7 | Enquire |
| 6-Amino-1-methyl-5-(methylamino)uracil | Intermediates | CS-T-03014 | 55441-70-8 | Enquire |
| 6-Amino-1-methyluracil | Intermediates | CS-T-03013 | 2434-53-9 | Enquire |
| 6-Amino-2-methylthio-3-methyluracil | Intermediates | CS-T-03095 | 54030-56-7 | Enquire |
| 6-Amino-2-thiouracil Hydrate | Intermediates | CS-T-03547 | 65802-56-4 | Enquire |
| 6-Amino-3-methyluracil | Intermediates | CS-T-03101 | 21236-97-5 | In Stock |
| 6-Amino-5-(formyl-N-methylamino)-1,3-dimethyluracil | Intermediates | CS-ED-08410 | 33130-55-1 | Enquire |
| 6-Amino-5-(N-formyl-N-methyl)-3-methyluracil | Intermediates | CS-T-02667 | 55782-76-8 | Enquire |
| 6-Amino-5-nitro-2-thio-uracil | Intermediates | CS-T-03142 | 98020-47-4 | Enquire |
| 6-Amino-5-nitrouracil | Intermediates | CS-T-03150 | 3346-22-3 | Enquire |
| 6-Chlorouracil | Intermediates | CS-T-12750 | 4270-27-3 | Enquire |
| 6-Methyl-2-thiouracil | Intermediates | CS-M-55617 | 56-04-2 | Enquire |
| 6-Uracilylmethylene Triphenylphosphonium Chloride | Intermediates | CS-T-46141 | 36803-39-1 | Enquire |
| Ethyl 2-thiouracil-5-carboxylate | Intermediates | CS-T-77616 | 38026-46-9 | Enquire |
| Uracil arabinose-5'-phosphate | Intermediates | CS-ED-11490 | 18354-06-8 | Enquire |
Glucuronides
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "5-Fluorouracil-β-D-Glucuronide Methyl Ester, 2,3,4-Tri... | Glucuronides | CS-T-54943 | 77476-81-4 | Enquire |
| 5-Fluorouracil-β-D-Glucuronide | Glucuronides | CS-T-54942 | 66048-45-1 | Enquire |
| Propylthiouracil-Beta-D-Glucuronide | Glucuronides | CS-T-60853 | 33987-24-5 | 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-Methylthio Uracil | Fine Chemicals | CS-T-82662 | 5751-20-2 | Enquire |
| 2-Thiouracil | Fine Chemicals | CS-T-44269 | 141-90-2 | In Stock |
| 5,6-Diaminouracil Sulfate | Fine Chemicals | CS-T-16948 | 42965-55-9 | Enquire |
| 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-Cyanouracil | Fine Chemicals | CS-T-73994 | 4425-56-3 | Enquire |
| 5-Fluoro Uracil | Fine Chemicals | CS-O-30920 | 51-21-8 | In Stock |
| 5-Vinyluracil | Fine Chemicals | CS-T-62737 | 37107-81-6 | Enquire |
| 6-Amino-1,3-dimethyluracil | Fine Chemicals | CS-T-65494 | 6642-31-5 | In Stock |
| 6-Chloro-3-methyluracil | Fine Chemicals | CS-M-03133 | 4318-56-3 | Enquire |
| Propylthiouracil | Fine Chemicals | CS-T-40828 | 51-52-5 | In Stock |
| Uracil | Fine Chemicals | CS-T-46139 | 66-22-8 | In Stock |
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 |