Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Lactone, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Lactone 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 Lactone-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 Lactone-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.
Lactone Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (R/S)-δ-Hexalactone-d6 | Stable Isotopes | CS-T-102943 | 823-22-3(Unlabelled) | Enquire |
| 4-Dehydroxy-3-dehydro-pitavastatin-d5 Lactone | Stable Isotopes | CS-T-97649 | Not Available | Enquire |
| 6-Phosphoglucono-δ-lactone-13C6 | Stable Isotopes | CS-T-94319 | 2641-81-8(unlabelled) | Enquire |
| 6β-Hydroxy-7α-thiomethylspironolactone-d3 | Stable Isotopes | CS-O-56566 | 42219-60-3 (Unlabelled) | Enquire |
| 7-Alpha-Thiomethyl Spironolactone-d3 | Stable Isotopes | CS-O-03646 | 38753-77-4(Unlabeled) | In Stock |
| 7a-Thiomethyl Spironolactone-d7 (Major) | Stable Isotopes | CS-T-102348 | 38753-77-4 (Unlabelled) | Enquire |
| Amitifadine Lactone-d5 | Stable Isotopes | CS-T-100839 | 2714485-10-4 | Enquire |
| Atorvastatin-d5 (N-(phenyl-d5) Lactone | Stable Isotopes | CS-TA-20572 | 265989-48-8 | Enquire |
| D-[1-13C]glucono-1,5-lactone | Stable Isotopes | CS-OC-00589 | 90-80-2 (unlabeled) | Enquire |
| D-[6,6'-D2]glucono-1,5-lactone | Stable Isotopes | CS-OC-00643 | 90-80-2 (unlabeled) | Enquire |
| D-[6-13C]glucono-1,5-lactone | Stable Isotopes | CS-OC-00574 | 90-80-2 (unlabeled) | Enquire |
| D-[UL-13C6]glucono-1,5-lactone | Stable Isotopes | CS-OC-00571 | 90-80-2 (unlabeled) | Enquire |
| D-[UL-13C6]glucurono-6,3-lactone | Stable Isotopes | CS-OC-00196 | 32449-92-6 (unlabeled) | Enquire |
| gamma-Butyrolactone-[D6] | Stable Isotopes | CS-I-00647 | 77568-65-1 | Enquire |
| Geissman Lactone-d2 | Stable Isotopes | CS-T-100271 | Not Available | Enquire |
| L-[UL-13C6]gulono-1,4-lactone | Stable Isotopes | CS-OC-00470 | 1128-23-0 (unlabeled) | Enquire |
| N-Desmethyl Rosuvastatin Lactone-d6 | Stable Isotopes | CS-T-97619 | Not Available | Enquire |
| Pitavastatin Lactone-d4 | Stable Isotopes | CS-O-13751 | 141750-63-2(Unlabeled) | In Stock |
| Pravastatin Lactone Di-(tert-butyldimethylsilyl) Ether-d3 | Stable Isotopes | CS-T-97206 | Not Available | Enquire |
| Pravastatin-D9 Lactone Di-(tert-butyldimethylsilyl) Ether | Stable Isotopes | CS-T-97207 | Not Available | Enquire |
| Pravastatin-d9 δ-Valerolactone | Stable Isotopes | CS-T-97208 | Not Available | Enquire |
| Simvastatin-d3 Lactone | Stable Isotopes | CS-O-02676 | 1002347-61-6 | In Stock |
| Spironolactone-d3 | Stable Isotopes | CS-O-00897 | 52-01-7 (Unlabeled) | In Stock |
| Spironolactone-d7 (Major) | Stable Isotopes | CS-O-15143 | 52-01-7(Unlabeled) | In Stock |
| γ-Valerolactone-d3 | Stable Isotopes | CS-T-103808 | 108-29-2(unlabelled) | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Brachialactone | API | CS-O-57842 | ---- | Enquire |
| D-Erythronolactone | API | CS-T-54187 | 15667-21-7 | Enquire |
| Galanolactone | API | CS-E-00773 | 115753-79-2 | Enquire |
| Spironolactone | API | CS-O-30758 | 52-01-7 | In Stock |
| Testolactone | API | CS-O-48236 | 968-93-4 | Enquire |
| Testololactone | API | CS-T-61662 | 4416-57-3 | Enquire |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-Hydroxy Atorvastatin Lactone | Metabolite | CS-O-14406 | 163217-74-1 | In Stock |
| 4-Hydroxy Atorvastatin Lactone | Metabolite | CS-O-07274 | 163217-70-7 | In Stock |
| 7-Alpha-Thiomethyl Spironolactone | Metabolite | CS-O-30463 | 38753-77-4 | In Stock |
| Desacetylcefotaxime Lactone | Metabolite | CS-O-05961 | 66340-33-8 | In Stock |
| Pitavastatin Lactone | Metabolite | CS-O-05982 | 141750-63-2 | In Stock |
| Quinic acid lactone | Metabolite | CS-Y-00141 | 665-27-0 | Enquire |
| Simalikalactone D | Metabolite | CS-ED-41633 | 35321-80-3 | Enquire |
| Simvastatin Lactone | Metabolite | CS-O-05972 | 79902-63-9 | In Stock |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (+)-Corey Lactone Benzoate | Impurity | CS-T-91533 | 53275-53-9 | Enquire |
| (+)-Hydroxycitric acid lactone | Impurity | CS-E-00927 | 27750-13-6 | Enquire |
| (3R,5R)-Rosuvastatin Lactone | Impurity | CS-T-85371 | 1422954-11-7 | Enquire |
| 1,2-O-Isopropylidene-α-D-glucofuranosidurono-6,3-lacton... | Impurity | CS-T-56871 | 20513-98-8 | Enquire |
| 1,2-O-Isopropylidene-β-L-idofuranurono-6,3-lactone | Impurity | CS-T-56863 | 29514-28-1 | Enquire |
| 2,3,4,6-Tetra-O-(trimethylsilyl)-D-glucono-1,5-lactone | Impurity | CS-O-32367 | 32384-65-9 | In Stock |
| 2,3,4,6-Tetra-O-benzyl-D-glucono-1,5-lactone | Impurity | CS-T-61735 | 13096-62-3 | Enquire |
| 3,5-dihydroxy-2-deoxy-2-chloro-2-C-methyl-D-ribono-γ-lactone | Impurity | CS-N-05198 | 1496551-64-4 | Enquire |
| 3,5-di-O-benzoyl-2-deoxy-2-chloro-2-C-methyl-D-ribono-γ-lact... | Impurity | CS-N-05197 | 1496551-65-5 | Enquire |
| 6-epi Pravastatin Lactone | Impurity | CS-T-60712 | 85956-23-6 | Enquire |
| 6-β-Hydroxy-7-α-thiomethyl Spironolactone | Impurity | CS-T-56504 | 42219-60-3 | Enquire |
| Anhydro Lovastatin Lactone | Impurity | CS-O-05512 | 109273-98-5 | In Stock |
| Atorvastatin Dehydro Lactone | Impurity | CS-P-07050 | 442851-50-5 | In Stock |
| Atorvastatin Lactone Diepoxide | Impurity | CS-O-14628 | 1046118-40-4 | In Stock |
| Atorvastatin Pyrrolidone Lactone | Impurity | CS-P-03231 | 906552-19-0 | In Stock |
| Betamethasone 20-keto-22,17-lactone | Impurity | CS-O-52526 | Not Available | Enquire |
| Calcitriol Lactone | Impurity | CS-T-69563 | 81203-50-1 | Enquire |
| Caprolactone polymer | Impurity | CS-O-33877 | 24980-41-4 | In Stock |
| Cefdinir Lactone | Impurity | CS-T-50421 | 946573-41-7 | In Stock |
| Cefotetan Lactone | Impurity | CS-T-96083 | Not Available | Enquire |
| cis-trans Nepetalactone | Impurity | CS-T-59229 | 21651-62-7 | Enquire |
| Corey lactone-4-(tert-Butyldimethylsilyl)oxy)-5-(tetrahydro-... | Impurity | CS-O-57331 | 65025-95-8 | Enquire |
| Dapagliflozin Bromo lactone impurity | Impurity | CS-O-34035 | ---- | In Stock |
| Daptomycin Lactone hydrolysis | Impurity | CS-O-35562 | Not Available | Enquire |
| Decarbamylcefoxitin Lactone | Impurity | CS-T-73463 | 1422023-33-3 | Enquire |
| Dehydro Ascorbic Acid (threo-2,3-Hexodiulosonic Acid, gama-l... | Impurity | CS-P-07068 | 33124-69-5 | Enquire |
| delta-Valerolactone | Impurity | CS-T-46227 | 542-28-9 | In Stock |
| D-Glucaric acid 1,4:6,3-dilactone | Impurity | CS-O-35230 | 826-91-5 | Enquire |
| DL-Homocysteine Thiolactone | Impurity | CS-P-07516 | 10593-85-8 | Enquire |
| D-Ribonolactone | Impurity | CS-T-61142 | 5336-08-3 | Enquire |
| E-Cefdinir Lactone | Impurity | CS-O-56651 | ---- | Enquire |
| ent-Rosuvastatin Lactone | Impurity | CS-T-41967 | 615263-62-2 | Enquire |
| Fluvastatin Lactone Sodium | Impurity | CS-O-39886 | 94061-83-3 (freebase) | Enquire |
| Irinotecan Lactone chloride salt | Impurity | CS-EO-03623 | 143490-53-3 (Freebase) | Enquire |
| Irinotecan Lactone Impurity | Impurity | CS-T-56775 | 143490-53-3 | Enquire |
| Latanoprost-1,9-lactone | Impurity | CS-O-41413 | 1261926-71-9 | Enquire |
| LCH gamma lactone | Impurity | CS-O-16670 | Not Available | Enquire |
| L-Erythrono-1,4-lactone | Impurity | CS-T-54179 | 23732-40-3 | Enquire |
| Lovastatin Lactone Diol | Impurity | CS-O-08186 | 79952-42-4 | In Stock |
| L-Ribono-1,4-lactone | Impurity | CS-T-61141 | 133908-85-7 | Enquire |
| Mycophenolic Acid Lactone (EP Impurity H) | Impurity | CS-T-83349 | 79081-87-1 | In Stock |
| Mycophenolic Lactone Ether | Impurity | CS-O-51993 | 26693-54-9 | In Stock |
| O(phenyl)-Triisopropylsilyl Jasplakinolide seco-Lactone Meth... | Impurity | CS-ED-26818 | 943858-37-5 | Enquire |
| Prasugrel Hydroxy Thiolactone | Impurity | CS-T-60709 | 947502-66-1 | In Stock |
| Pravastatin Lactone | Impurity | CS-O-30741 | 85956-22-5 | Enquire |
| Rosuvastatin Anhydro Lactone | Impurity | CS-T-41964 | 1246665-85-9 | In Stock |
| Ruxolitinib Lactone Impurity | Impurity | CS-EO-01330 | Not Available | Enquire |
| Spironolactone EP impurity B | Impurity | CS-O-10704 | Not Available | Enquire |
| Spironolactone EP Impurity D | Impurity | CS-O-10706 | 3079028-52-4 | In Stock |
| Spironolactone EP Impurity H | Impurity | CS-O-10710 | 53866-24-3 | In Stock |
| Tolterodine Lactone Impurity | Impurity | CS-T-34918 | 40546-94-9 | In Stock |
Intermediate
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Cyclic 2,3-O-oxalyl L-threonolactone | Intermediate | CS-O-54873 | ---- | Enquire |
| L-Glucono-1,5-lactone | Intermediate | CS-O-10972 | 52153-09-0 | In Stock |
Glucuronide
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (rac-Enterolactone)-O-glucuronide (Mixture of Diastereomers) | Glucuronide | CS-T-92383 | 768385-57-5 | Enquire |
| 2,3,4,6-Tetra-O-benzyl-5-thio-D-glucono-1,5-lactone | Glucuronide | CS-O-51172 | 131757-92-1 | Enquire |
| D-(+)-Glucuronic Acid-Lactone | Glucuronide | CS-O-10824 | 32449-92-6 | In Stock |
| D-glucaro-1,4-lactone | Glucuronide | CS-ED-00787 | 389-36-6 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 4-Hydroxybutanoic acid lactone | Fine Chemicals | CS-O-13298 | 96-48-0 | In Stock |
| b-Propiolactone | Fine Chemicals | CS-T-40660 | 57-57-8 | In Stock |
| D-Galactonolactone | Fine Chemicals | CS-ED-01884 | 15892-28-1 | Enquire |
| Gamma-Decalactone | Fine Chemicals | CS-E-00220 | 706-14-9 | In Stock |
| Glucuronolactone | Fine Chemicals | CS-O-01595 | 32499-92-6 | In Stock |
| Lachnophyllum Lactone | Fine Chemicals | CS-O-57812 | 23251-68-5 | Enquire |
| L-Glucurono-3,6-lactone | Fine Chemicals | CS-T-55361 | 32449-80-2 | Enquire |
| ε-Caprolactone | Fine Chemicals | CS-T-70916 | 502-44-3 | Enquire |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| D-Glucono-1,4-Lactone | Building Blocks | CS-EP-00191 | 1198-69-2 | Enquire |
| Yoshimulactone Green (YLG) | Building Blocks | CS-DE-01658 | 1807549-00-3 | Enquire |
Carbohydrates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| D-Galactono-1,4-lactone | Carbohydrates | CS-T-55192 | 2782-07-2 | Enquire |
| L-Galactono-1,4-lactone | Carbohydrates | CS-T-55193 | 1668-08-2 | Enquire |
| L-lyxono-1,4-lactone | Carbohydrates | CS-OC-00117 | 104196-15-8 | Enquire |
Chiral
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| D-(+)-Glucono-1,5-lactone | Chiral | CS-T-25298 | 90-80-2 | In Stock |
Deuterated Reagents
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| γ-Butyrolactone-d6 | Deuterated Reagents | CS-T-62871 | 77568-65-1 | Enquire |
Stable Isotope Reagent
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (±)-d-Hexalactone (5,5,6-d3, methyl-d3) | Stable Isotope Reagent | CS-C-02155 | 2124294-74-0 | Enquire |
| (±)-Mevalonolactone-4,4,5,5,6,6,6-d7 | Stable Isotope Reagent | CS-C-02134 | 347840-19-1 | Enquire |
| DL-Homocysteine Thiolactone-3,3,4,4-d4 | Stable Isotope Reagent | CS-C-01999 | 1219805-31-8 | Enquire |
| epsilon-Caprolactone-3,3,4,4,5,5-d6 | Stable Isotope Reagent | CS-C-01732 | 1219802-08-0 | Enquire |
| Gamma - Decalactone - d7 | Stable Isotope Reagent | CS-O-53080 | 1104979-33-0 | Enquire |
| gamma-Dodecalactone d2 | Stable Isotope Reagent | CS-O-53084 | 1082581-85-8 | Enquire |
Therapeutic
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (-) Corey Lactone | Therapeutic | CS-T-13328 | 32233-40-2 | In Stock |
| Atorvastatin Lactone | Therapeutic | CS-O-07292 | 125995-03-1 | In Stock |
| Cefdinir Decarboxy Open Ring Lactone (Mixture of A and B) | Therapeutic | CS-O-10171 | 178949-04-7 | Enquire |
| Rosuvastatin Lactone d6 | Therapeutic | CS-P-06214 | 503610-43-3(Unlabeled) | In Stock |
| Spironolactone EP impurity A | Therapeutic | CS-O-10703 | 132458-33-4 | Enquire |
| Spironolactone EP Impurity C | Therapeutic | CS-O-10705 | 976-70-5 | In Stock |
| Spironolactone EP Impurity E | Therapeutic | CS-O-10707 | 33784-05-3 | In Stock |
| Spironolactone EP impurity G | Therapeutic | CS-O-10709 | 880106-10-5 | In Stock |
| Spironolactone EP Impurity I | Therapeutic | CS-O-10711 | 3070439-36-7 | In Stock |
| Tacrolimus Lactone Isomer | Therapeutic | CS-O-08222 | 134590-88-8 | Enquire |