Clearsynth, with its R&D center located in Hyderabad, is built around the core philosophy of “the heart of innovation and precision.” The company focuses on innovative organic chemistry and the synthesis of unique, complex molecules, covering stable isotope-labeled compounds, metabolites, impurities, glucuronides, chiral compounds, conjugated impurities, and radiolabeled compounds. Clearsynth also provides custom synthesis services for complex molecules and difficult-to-synthesize compounds or intermediates. With a portfolio of more than 359,000 high-purity reference standards, the company supports research, analytical development, and pharmaceutical applications through products such as stable isotopes, APIs, impurities, nitrosamines, secondary standards, and bulk compounds.
Vicbio Biotechnology Co., Ltd. provides the full range of Clearsynth products.
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Stable isotope-labeled compounds for analytical, bioanalytical, and pharmaceutical research applications, supporting method development, quantification, and tracing studies.
Active pharmaceutical ingredients supplied for research, analytical reference, and related development needs.
A wide range of impurity standards designed to support pharmaceutical analysis, method validation, and regulatory compliance.
Reference materials and related compounds for nitrosamine analysis, helping support impurity profiling and safety assessment workflows.
High-quality secondary reference standards intended for routine analytical applications and laboratory quality control.
Bulk-scale compounds available for research, process development, and industrial applications requiring larger material quantities.
Clearsynth also provides integrated service support across multiple areas, including small molecule synthesis from milligram to kilogram scale, process development and optimization, end-to-end contract research from preclinical stages through Phase III and technology transfer, GLP-compliant bio-NMR services, CDMO support for complex and hazardous products, and analytical services aligned with major regulatory standards.
| Product Name | Cat. # | CAS |
| α-Keto Isovaleric Acid Sodium Salt 13C D6 | CS-R-00562 | 3715-29-5 (Unlabeled) |
| α-Keto Isovaleric Acid Sodium Salt 13C5 | CS-R-00482 | 1173018-24-0 |
| α-Keto Isovaleric Acid Sodium Salt D6 | CS-R-00485 | 3715-29-5(Unlabeled) |
| α-Keto Isovaleric Acid Sodium Salt Dimethyl-13C2 | CS-R-00488 | 634908-42-2 |
| α-KETOBUTYRIC ACID, SODIUM 13C, D4 | CS-R-00475 | 2013-26-5 (Unlabeled) |
| α-KETOBUTYRIC ACID, SODIUM SALT 13C4, D2 | CS-R-00477 | 360769-17-1 |
| α-KETOBUTYRIC ACID, SODIUM SALT METHYL-13C | CS-R-00478 | 634908-43-3 |
| α-KETOBUTYRIC ACID, SODIUM SALT METHYL-13C, D2 | CS-R-00479 | 1007476-77-8 |
| α-Ketobutyric Acid-d2 Sodium Salt | CS-T-30294 | 1007476-82-5 |
| α-Ketoglutaric acid 13C2, D2 | CS-CX-00331 | 123953-28-6 |
| α-KETOGLUTARIC ACID 13C5 | CS-R-00549 | 161096-83-9 |
| α-KETOGLUTARIC ACID, DISODIUM SALT 13C4 | CS-R-00480 | 1429051-79-5 |
| α-KETOISOCAPROIC ACID 13C | CS-R-00551 | 92751-19-4 |
| α-KETOISOCAPROIC ACID, SODIUM SALT 13C2 | CS-R-00552 | 4502-00-5(Unlabeled) |
| α-KETOISOCAPROIC ACID, SODIUM SALT ISOPROPYL-D7 | CS-R-00555 | 1795020-84-6 |
| α-Tocopherol-[13C3] | CS-I-00340 | 59-02-9 (Unlabeled) |
| β-ALANINE 13C | CS-R-00042 | 65138-34-3 |
| β-ALANINE 13C, 15N | CS-R-00449 | 1822942-84-6 |
| β-ALANINE 13C3 | CS-R-00040 | 107-95-9 (Unlabeled) |
| β-ALANINE 15N | CS-R-00041 | 204451-53-6 |
| β-CAROTENE 13C4 | CS-R-00567 | 7235-40-7(Unlabeled) |
| -β-Cyclocitral-d5 | CS-T-51410 | 78995-98-9 |
| β-Endosulfan D4 | CS-O-15034 | 203716-99-8 |
| β-Ionone-[13C3] | CS-I-00368 | 14901-07-6 (Unlabeled) |
| βmethasone 17-propionate-d3 | CS-O-10426 | 5534-13-4 (Unlabeled) |
| β-Tocopherol-[13C9] | CS-I-00341 | 59-02-9 (Unlabeled) |
| γ-HCH D6 | CS-EJ-0009 | 60556-82-3 |
| (-)-(2S,3S)-Viridifloric Acid Acetonide-d7 | CS-T-102816 | 95462-09-2(Unlabelled) |
| (-)-(2S,3S)-Viridifloric Acid Ethyl Ester-d7 | CS-T-102815 | 176712-53-1(Unlabelled) |
| (-)-(3S)-3-Hydroxy Quinine-vinyl-d3 | CS-T-101262 | 2734920-65-9 |
| (-)-(S)-Cibenzoline-D4 | CS-O-33254 | 103419-18-7 (Unlabeled) |
| (-)-2-Amino-6-propionamido-d3-tetrahydrobenzothiazole | CS-T-97805 | 1217644-20-6 |
| (-)-2-Methyl Isoborneol-d3 | CS-T-58298 | 135441-89-3 |
| (-)-alfa-Benidipine-d5 Hydrochloride | CS-P-07295 | 129262-07-3 (Unlabeled) |
| (-)-Cannabidiol-d9 | CS-TA-86322 | 1246819-21-5 |
| (-)-Citrinin-13C,d2 | CS-T-72877 | 1329611-85-9 |
| (-)-Delta-9-THC 13C4 | CS-EK-00735 | 81586-39-2 unlabeled |
| (-)-Dihydroaflatoxin Carboxaldehyde D2-d3 | CS-T-102424 | 292824-31-8(Unlabelled) |
| (-)-Dihydroaflatoxin D2-d3 | CS-T-102664 | 6795-22-8(Unlabelled) |
| (-)-Epicatechin-D5 | CS-O-56438 | 490-46-0(Unlabelled) |
| (-)-Huperzine A-d7 major (>90%) | CS-T-102994 | 102518-79-6(Unlabelled) |
| (-)-Hyoscyamine-d3 (N-methyl-d3) | CS-C-01360 | 101-31-5(unlabelled) |
| (-)-Normacromerine-d3 | CS-T-82807 | 1329805-62-0 |
| (-)-OSU-d7 | CS-T-83279 | 1217737-52-4 |
| (-)-Riboflavin 13C4, 15N2 | CS-EK-00236 | 1217461-14-7 |
| (-)-Riboflavin 5-phosphate 13C4, 15N2 | CS-EK-02247 | 146-17-8 unlabeled |
| (-)-Tabersonine-D2 | CS-T-103793 | 4429-63-4(unlabelled) |
| (-)-Tranylcypromine-d5 Hydrochloride | CS-O-10128 | 95-62-5(Unblabeled) |
| ([13C6]Leu15)-pTH (human) (H-7234.1000) | CS-AX-01310 | 1927927-15-8 |
| ([13C6]Leu5)-Ghrelin (human) (H-7252.0500) | CS-AX-01313 | 1802078-40-5 |
| ([ring-D₅]Phe⁸)-Angiotensin II | CS-O-56808 | 1926163-73-6 |
| (+) Tranylcypromine-d5 | CS-P-02605 | 3721-28-6 (Unlabeled) |
| (+)-(S)-Tylophorine-d8 | CS-T-87728 | 1795785-68-0 |
| (+)-2-Amino-6-propionamido-d3-tetrahydrobenzothiazole | CS-T-66751 | 1217680-69-7 |
| (+-)-4-Hydroxy-3-methoxymandelic Acid-D3 | CS-I-00653 | 55-10-7(Unlabeled) |
| (+)-9-deMe-DTBZ-D3 | CS-T-103632 | 1065193-59-0(unlabelled) |
| (+)-alpha-Benidipine-D5 | CS-O-493013 | 129262-08-4 (Unlabelled) |
| (+)-Alpha-Dihydrotetrabenazine-d6 | CS-CX-00756 | 1583277-30-8 |
| (+)-Beta-Dihydrotetrabenazine-d6 | CS-CX-00775 | 1583277-32-0 |
