Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Estradiol, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Estradiol 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 Estradiol-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 Estradiol-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.
Estradiol Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| ∆9,11-Estradiol-d3 | Stable Isotopes | CS-T-99571 | Not Available | Enquire |
| 16-Keto-17β-estradiol-2,4,15,15,17-d5 | Stable Isotopes | CS-C-01029 | 566-75-6(unlabelled) | Enquire |
| 17-Alpha-Ethinyl Estradiol-d4 | Stable Isotopes | CS-O-02753 | 350820-06-3 | In Stock |
| 17b-Acetyl-estradiol-d3 3-(Tri-O-acetyl-b-D-glucuronic Acid ... | Stable Isotopes | CS-T-99708 | Not Available | Enquire |
| 17b-Estradiol-d3 17-Acetate | Stable Isotopes | CS-T-97531 | Not Available | Enquire |
| 17beta-Estradiol 3-O-Sulfate-d3 Sodium Salt | Stable Isotopes | CS-T-94918 | 4999-79-5 (Unlabelled0 | Enquire |
| 17-Beta-Estradiol-16,16,17d3 | Stable Isotopes | CS-O-10121 | 79037-37-9 | In Stock |
| 17beta-Estradiol-16,16-d2 | Stable Isotopes | CS-T-94789 | 3188-46-3 | Enquire |
| 17beta-Estradiol-17-valerate-d4 | Stable Isotopes | CS-T-99567 | Not Available | Enquire |
| 17-beta-Estradiol-2,4,16,16,17-d5 | Stable Isotopes | CS-ZG-86818 | 221093-45-4 | Enquire |
| 17beta-Estradiol-2,4,16,16-d4 17-Pentanoate | Stable Isotopes | CS-C-00601 | 2673269-82-2 | Enquire |
| 17β-Estradiol-16,16,17-d3 3-Benzoate | Stable Isotopes | CS-T-94917 | 1192354-74-7 | Enquire |
| 17ß-Estradiol-17-valerate-D4 | Stable Isotopes | CS-F-00047 | 979-32-8 (unlabelled) | Enquire |
| 17α-Estradiol-D3 | Stable Isotopes | CS-O-42927 | 57-91-0 (Unlabelled) | Enquire |
| 17α-Ethynylestradiol-16,16-d2 3-Methyl Ether | Stable Isotopes | CS-C-01053 | 72-33-3 (Unlabelled) | Enquire |
| 17α-Ethynylestradiol-2,4,16,16-d4 3-Methyl Ether | Stable Isotopes | CS-C-01068 | 72-33-3 (Unlabelled) | Enquire |
| 17β-Estradiol 17-Sulfate Potassium Salt-d3 | Stable Isotopes | CS-T-99251 | 23929-50-2 (unlabeled) | Enquire |
| 17β-Estradiol-13C3 Undecanoate | Stable Isotopes | CS-I-00463 | 2482467-27-4 | Enquire |
| 17β-Estradiol-2,4,16,16-d4 17-Pentanoate | Stable Isotopes | CS-C-01242 | 2673269-82-2 | Enquire |
| 17β-Estradiol-d3 17β-D-Glucuronide | Stable Isotopes | CS-T-99572 | Not Available | Enquire |
| 17β-Estradiol-d5 Cyclic Ethylene Acetal | Stable Isotopes | CS-T-99564 | Not Available | Enquire |
| 2-Methoxy-[13C,d3]-estradiol | Stable Isotopes | CS-I-00475 | 1217470-09-1 | Enquire |
| 2-Methyl-d3 Ethynyl Estradiol | Stable Isotopes | CS-T-99478 | Not Available | Enquire |
| 3-O-Benzyl 17b-Estradiol-d3 17-Acetate | Stable Isotopes | CS-T-99695 | Not Available | Enquire |
| 3-O-Methyl 6-Hydroxy-17b-estradiol-d3 17-O-Tetrahydropyran | Stable Isotopes | CS-T-99474 | Not Available | Enquire |
| 3-O-Methyl 6-Keto 17b-Estradiol-d2 17-O-Tetrahydropyran | Stable Isotopes | CS-T-99470 | Not Available | Enquire |
| 3-O-Methyl 6-Keto 17β-Estradiol-d2 17-O-Tetrahydropyran | Stable Isotopes | CS-T-94432 | 174497-42-8(unlabelled) | Enquire |
| 4-Carboxyl-17β-Estradiol-d3 | Stable Isotopes | CS-T-99578 | Not Available | Enquire |
| 4-Hydroxyestradiol-2-glutathione-15N3 | Stable Isotopes | CS-T-97439 | Not Available | Enquire |
| 4-Methoxy-[13C,d3]-estradiol | Stable Isotopes | CS-I-00476 | 1217442-62-0 | Enquire |
| 4-Methoxy-17beta-estradiol-1,2,16,16,17-d5 | Stable Isotopes | CS-C-01487 | 26788-23-8(unlabelled) | Enquire |
| 8,9-Dehydro-17b-estradiol 16,16,17-d3 | Stable Isotopes | CS-C-00941 | 23392-54-3(unlabelled) | In Stock |
| Estradiol 17-Valerate-d12 | Stable Isotopes | CS-T-99568 | Not Available | Enquire |
| Estradiol Acetate-d3 | Stable Isotopes | CS-T-103962 | 4245-41-4(unlabelled) | Enquire |
| Estradiol Sulphate-d4 Sodium | Stable Isotopes | CS-O-02830 | 352431-50-6 | In Stock |
| Estradiol-(13,14,15,16,17,18-13C6) | Stable Isotopes | CS-T-99573 | Not Available | Enquire |
| Estradiol-13C6 | Stable Isotopes | CS-O-42581 | 1075720-58-9 | Enquire |
| Estradiol-d3 3-Propyl Ether | Stable Isotopes | CS-T-99563 | Not Available | Enquire |
| Estradiol-d3 Dicypionate | Stable Isotopes | CS-T-99569 | Not Available | Enquire |
| Estradiol-d4 | Stable Isotopes | CS-O-06592 | 66789-03-5 | In Stock |
| Ethinylestradiol-d7 | Stable Isotopes | CS-EO-02527 | Not Available | Enquire |
| Ethynyl Estradiol 3-Sulfate Sodium Salt-d4 (Major) | Stable Isotopes | CS-T-102804 | 724762-79-2 (Unlabelled) | Enquire |
| Ethynyl Estradiol-d7 | Stable Isotopes | CS-T-99576 | Not Available | Enquire |
| Ethynylestradiol-16,16-d2 ethynyl-13C2 | Stable Isotopes | CS-O-52760 | 57-63-6 (Unlabelled) | Enquire |
| Sodium 17beta-Estradiol-16,16,17-d3 3-Glucuronide | Stable Isotopes | CS-C-01168 | 14982-12-8(unlabelled) | Enquire |
| α-Estradiol 3-Benzoate-d5 | Stable Isotopes | CS-T-99577 | Not Available | Enquire |
| β-Estradiol-d3 3-(β-D-Glucuronide) 17-Sulfate Dipotassium Sa... | Stable Isotopes | CS-T-98466 | Not Available | Enquire |
| β-Estradiol-d3 3,17-Disulfate Dipotassium Salt | Stable Isotopes | CS-T-99250 | 17046-60-5 (unlabeled) | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Estradiol Acetate | API | CS-T-96138 | 4245-41-4 | Enquire |
| Estradiol Enanthate | API | CS-T-54255 | 4956-37-0 | Enquire |
| Estradiol Valerate | API | CS-O-14664 | 979-32-8 | In Stock |
| Estramustine Disodium Phosphate | API | CS-O-01465 | 52205-73-9 | In Stock |
| Estrone | API | CS-O-10855 | 53-16-7 | In Stock |
| Ethinyl Estradiol | API | CS-O-01450 | 57-63-6 | In Stock |
| Estradiol Cypionate | API | CS-T-92454 | 313-06-4 | Enquire |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Estradiol-3,17-beta-dibutyrate | Metabolite | CS-O-43731 | 63042-23-9 | Enquire |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 16-Oxo Ethynyl Estradiol | Impurity | CS-T-60074 | 1350468-76-6 | Enquire |
| 17-alpha-Ethynyl Estradiol-3-Sulfate Triethylamine Salt | Impurity | CS-P-09239 | 24560-70-1 (free acid) | Enquire |
| 17B-Estradiol | Impurity | CS-O-11584 | 50-28-2 | In Stock |
| 17b-Estradiol 3-O-Sulfate Sodium Salt | Impurity | CS-T-54259 | 4999-79-5 | In Stock |
| 1-Hydroxy-4-methyl-17-ethynyl-3-dehydroxyestradiol | Impurity | CS-T-78594 | 1034298-00-4 | Enquire |
| 1-Methyl Ethynyl Estradiol | Impurity | CS-T-58205 | 15071-66-6 | Enquire |
| 2-Methyl Ethynyl Estradiol | Impurity | CS-T-58208 | 3240-39-9 | Enquire |
| 4-Methyl Estradiol enanthate | Impurity | CS-EO-02143 | Not Available | Enquire |
| 4-Methyl Ethynyl Estradiol | Impurity | CS-T-58206 | 155683-61-7 | Enquire |
| 4-Methyl-17-beta-Estradiol | Impurity | CS-O-15692 | 6171-48-8 | In Stock |
| 6-Keto Ethynyl Estradiol | Impurity | CS-T-57001 | 38002-18-5 | In Stock |
| 6-α-Hydroxy Ethynyl Estradiol | Impurity | CS-T-56010 | 27521-34-2 | In Stock |
| 9,11-Dehydro Ethynyl Estradiol | Impurity | CS-O-05547 | 1231-96-5 | In Stock |
| 9,11-Dehydro-17-Β-Estradiol 17-Valerate | Impurity | CS-T-51764 | 95959-20-9 | In Stock |
| bis((8S,13S,14S,17S)-3-hydroxy-13-methyl 7,8,12,13,14,15,16,... | Impurity | CS-O-46645 | Not Available | Enquire |
| Delta,9(11)-Estradiol | Impurity | CS-O-15161 | 791-69-5 | In Stock |
| di-(3-hydroxyestra 1,3,5(10),9(11)-tetraen-17b-yl)sulfite | Impurity | CS-O-47366 | Not Available | Enquire |
| Estradiol 17-octanoate | Impurity | CS-O-44022 | 63042-22-8 | Enquire |
| Estradiol 3-sulfate | Impurity | CS-T-96068 | 481-96-9 | In Stock |
| Estradiol Acetate Enanthate | Impurity | CS-EO-02188 | Not Available | Enquire |
| Estradiol Benzoate | Impurity | CS-O-01494 | 50-50-0 | In Stock |
| Estradiol Benzoate - Impurity G | Impurity | CS-O-38120 | 2393-53-5 | In Stock |
| Estradiol Dimer Impurity | Impurity | CS-EO-02856 | Not Available | Enquire |
| Estradiol Hexahydrobenzoate | Impurity | CS-O-43020 | 15140-27-9 | Enquire |
| Estradiol impurities - 1 | Impurity | CS-O-48054 | Not Available | Enquire |
| Estradiol impurities - 2 | Impurity | CS-O-48055 | Not Available | Enquire |
| Estradiol Impurity M | Impurity | CS-O-52523 | Not Available | Enquire |
| Estradiol Impurity N | Impurity | CS-O-52524 | Not Available | Enquire |
| Estradiol Valerate | Impurity | CS-0-14664 | 979-32-8 | In Stock |
| Estradiol-17-oleate | Impurity | CS-O-45639 | 82204-99-7 | Enquire |
| Estradiol-9-Ene Cypionate | Impurity | CS-O-44702 | Not Available | Enquire |
| Estriol 3-sulfate | Impurity | CS-O-13925 | 481-95-8 | In Stock |
| Ethinyl Estradiol EP Impurity I | Impurity | CS-T-51760 | 67703-68-8 | In Stock |
| Ethinyl Estradiol Related Compound B | Impurity | CS-K-00047 | 1231-96-5 | In Stock |
| Δ9(11)-Estradiol 17-Hexanoate | Impurity | CS-T-92535 | 95960-05-7 | In Stock |
| (13S,14S,17R)-Ethinyl Estradiol | Impurity | CS-P-07878 | 1357266-17-1 | Enquire |
| 16-Keto 17-β-Estradiol | Impurity | CS-T-57000 | 566-75-6 | Enquire |
| 17a-Estradiol 17-Valerate | Impurity | CS-T-54262 | 182624-54-0 | Enquire |
| 2-Hydroxy Estradiol 6-N3-Adenine | Impurity | CS-T-56032 | 912671-55-7 | Enquire |
| 2-Methoxy 17-β-Estradiol | Impurity | CS-T-57697 | 362-07-2 | Enquire |
| 6,7-Dehydro Estradiol | Impurity | CS-T-51762 | 7291-41-0 | Enquire |
| 6a-Hydroxy 17-Beta-Estradiol | Impurity | CS-T-55986 | 1229-24-9 | Enquire |
| 6a-Hydroxy-17-β-estradiol 17-Valerate | Impurity | CS-T-55989 | 1313382-26-1 | Enquire |
| 6-Dehydro Estradiol 17-Valerate | Impurity | CS-T-73518 | 1313382-25-0 | Enquire |
| 6-Oxo-17-estradiol 17-Valerate | Impurity | CS-P-07810 | 1313382-51-2 | Enquire |
| 8,9-Dehydro-17-Beta-estradiol | Impurity | CS-T-51763 | 23392-54-3 | Enquire |
| Estradiol 17-Butyrate | Impurity | CS-T-54244 | 18069-79-9 | Enquire |
| Estradiol 17-Hexanoate | Impurity | CS-T-54247 | 71764-18-6 | Enquire |
| Estradiol 3,17-Divalerate | Impurity | CS-T-54246 | 63042-28-4 | Enquire |
| Estradiol 3-Enanthate | Impurity | CS-P-07806 | 55540-97-1 | Enquire |
| Estradiol 3-Valerate | Impurity | CS-T-54261 | 21881-45-8 | Enquire |
| Estradiol Benzoate - Impurity C | Impurity | CS-O-38119 | 4147-13-1 | Enquire |
| Estradiol Benzoate EP Impurity F | Impurity | CS-EO-01349 | 95870-51-2 | Enquire |
| Estradiol Benzoate Impurity B | Impurity | CS-O-38127 | Not Available | Enquire |
| Estradiol Benzoate Impurity E (17-epi- Estradiol Benzoate) | Impurity | CS-P-07808 | 6045-53-0 | Enquire |
| Estradiol Dimer 1 | Impurity | CS-EO-00988 | Not Available | Enquire |
| Estradiol Dimer 2 | Impurity | CS-EO-00989 | Not Available | Enquire |
| Estradiol Hemihydrate EP Impurity A | Impurity | CS-EO-00948 | 19973-76-3 | Enquire |
| Estradiol valerate EP Impurity I | Impurity | CS-EO-00888 | Not Available | Enquire |
| ESTRADIOL VALERATE EP IMPURITY J | Impurity | CS-P-08554 | Not Available | Enquire |
| Ethinyl Estradiol Dimer Impurity 1 | Impurity | CS-F-00117 | 303014-90-6 | Enquire |
| Ethinyl Estradiol Dimer Impurity 2 | Impurity | CS-F-00118 | 303014-91-7 | In Stock |
| Ethinyl estradiol EP Impurity C | Impurity | CS-DN-00006 | Not Available | Enquire |
| Ethinyl estradiol EP Impurity D | Impurity | CS-DN-00007 | Not Available | Enquire |
| Ethinylestradiol Dimer | Impurity | CS-EO-00875 | Not Available | Enquire |
Intermediate
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| -β-Estradiol 17-Acetate | Intermediate | CS-T-22135 | 1743-60-8 | In Stock |
Glucuronide
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 17-Β-Estradiol 17-Β-D-Glucuronide | Glucuronide | CS-T-54241 | 1806-98-0 | In Stock |
| beta-Estradiol 17-(beta-D-glucuronide) sodium salt | Glucuronide | CS-T-92470 | 15087-02-2 | Enquire |
| β-Estradiol-β-(β-D-Glucuronide) 17-Sulfate Di... | Glucuronide | CS-T-54252 | 99156-45-3 | Enquire |
| 6α-Hydroxy-17βEstradiol 6-Glucuronide | Glucuronide | CS-O-37335 | Not Available | Enquire |
| Ethynyl Estradiol 17-β-D-Glucuronide | Glucuronide | CS-T-54227 | 75803-39-3 | Enquire |
| Ethynylestradiol-β-D-Glucuronide | Glucuronide | CS-T-54226 | 60134-76-1 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-hydroxy estradiol-3 methyl ether | Fine Chemicals | CS-O-54711 | 5976-65-8 | Enquire |
Building Blocks
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Estradiol-7-alpha-butyric Acid | Building Blocks | CS-TB-43211 | 55592-40-0 | Enquire |
Chiral
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 4-Hydroxyestradiol-2-glutathione | Chiral | CS-TB-67260 | 209523-07-9 | Enquire |
Industries
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Estradiol Hemihydrate | Industries | CS-O-01471 | 35380-71-3 | Enquire |
Steroids
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| delta-8(9)-Ethynylestradiol | Steroids | CS-O-43430 | 100019-04-3 | Enquire |