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Labelled stable isotope standards-API'S & API Impurities
Venkatasai is a leading provider of pharmaceutical reference standards, specializing in the supply of high-purity Labelled stable isotope standards-API'S & API Impurities reference materials. Our portfolio includes both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamine derivatives (N-NO products). These reference standards play a crucial role in pharmaceutical R&D, aiding in formulation development, ANDA/DMF submissions, quality control, method validation, stability studies, and impurity profiling—including the identification and assessment of potentially genotoxic impurities.
Each Labelled stable isotope standards-API'S & API Impurities-related product is rigorously characterized and delivered with a detailed Certificate of Analysis (COA) and comprehensive analytical data to ensure regulatory compliance. Upon request, we also offer EP/USP traceable standards. To maintain the highest quality standards, all materials are subject to periodic re-testing and continuous quality monitoring.
Adenine-2- D1
CAT No: VS-L102000
CAS No: 109923-52-6
Mol.F.: C5H4DN5
Mol.Wt.: 136.13
Status: In Stock
Adenosine-2 D1
CAT No: VS-L102001
CAS No: 109923-50-4
Mol.F.: C10H12DN5O4
Mol.Wt.: 268.25
Status: In Stock
Cytidine-5,6 D2
CAT No: VS-L102002
CAS No: 40632-25-5
Mol.F.: C9H11D2N3O5
Mol.Wt.: 245.23
Status: In Stock
Cytosine-5,6 D2
CAT No: VS-L102003
CAS No: 106391-24-6
Mol.F.: C4H3D2N3O
Mol.Wt.: 113.12
Status: In Stock
2'-Deoxyuridine-13C,15N2
CAT No: VS-L102004
CAS No: 369656-76-8
Mol.F.: C813CH1215N2O5
Mol.Wt.: 231.18
Status: In Stock
2'-Deoxyuridine-5,6 D2
CAT No: VS-L102005
CAS No: 40632-23-3
Mol.F.: C9H10D2N2O5
Mol.Wt.: 230.22
Status: In Stock
5,6-Dihydro Thymine-d6
CAT No: VS-L102006
CAS No: 334473-42-6
Mol.F.: C5H2D6N2O2
Mol.Wt.: 134.17
Status: In Stock
5,6-Dihydrouracil-5,5,6,6-d4
CAT No: VS-L102007
CAS No: 334473-41-5
Mol.F.: C4H2D4N2O2
Mol.Wt.: 118.13
Status: In Stock
2′-Fluoro-2'-deoxyuridine-5,6-d2
CAT No: VS-L102008
CAS No: 362049-50-1
Mol.F.: C9H9D2FN2O5
Mol.Wt.: 248.21
Status: In Stock
5-Methyl-d3-cytosine-6-d1
CAT No: VS-L102009
CAS No: 1219795-15-9
Mol.F.: C5H3D4N3O
Mol.Wt.: 129.16
Status: In Stock
5-Methyl Uridine-d4
CAT No: VS-L102010
CAS No: 82845-85-0
Mol.F.: C10H10D4N2O6
Mol.Wt.: 262.25
Status: In Stock
Thymidine-alpha,alpha,alpha,6D4
CAT No: VS-L102011
CAS No: 347841-67-2
Mol.F.: C10H10D4N2O5
Mol.Wt.: 246.26
Status: In Stock
Thymine-alpha,alpha,alpha,6 D4
CAT No: VS-L102012
CAS No: 156054-85-2
Mol.F.: C5H2D4N2O2
Mol.Wt.: 130.14
Status: In Stock
Uracil-5-d1
CAT No: VS-L102013
CAS No: 24897-50-5
Mol.F.: C4H3DN2O2
Mol.Wt.: 113.09
Status: In Stock
Uracil-6-d1
CAT No: VS-L102014
CAS No: 24897-51-6
Mol.F.: C4H3DN2O2
Mol.Wt.: 113.09
Status: In Stock
Uracil-1,3-d2
CAT No: VS-L102015
CAS No: 20666-60-8
Mol.F.: C4H2D2N2O2
Mol.Wt.: 114.1
Status: In Stock
Uracil-5,6-d2
CAT No: VS-L102016
CAS No: 24897-52-7
Mol.F.: C4H2D2N2O2
Mol.Wt.: 114.1
Status: In Stock
Uridine-2-13C
CAT No: VS-L102018
CAS No: 35803-42-0
Mol.F.: C813CH12N2O6
Mol.Wt.: 245.2
Status: In Stock
Uridine-5,6 D2
CAT No: VS-L102019
CAS No: 40632-21-1
Mol.F.: C9H10D2N2O6
Mol.Wt.: 246.22
Status: In Stock
Efinaconazole 13CD2
CAT No: VS-L102020
CAS No: NA
Mol.F.: C1713CH20D2F2N4O
Mol.Wt.: 351.4
Status: In Stock
Efinaconazole 13CD6
CAT No: VS-L102021
CAS No: NA
Mol.F.: C1713CH16D6F2N4O
Mol.Wt.: 355.43
Status: In Stock
Ondansetron 13CD3
CAT No: VS-L102022
CAS No: NA
Mol.F.: C1713CH16D3N3O
Mol.Wt.: 297.38
Status: In Stock
Hydrochlorothiazide 15N2,13CD2
CAT No: VS-L102023
CAS No: NA
Mol.F.: C613CH6D2ClN15N2O4S2
Mol.Wt.: 302.73
Status: In Stock
Tacrolimus-13C-D4
CAT No: VS-L102024
CAS No: NA
Mol.F.: C4313CH65D4NO12
Mol.Wt.: 809.04
Status: In Stock
Riociguat-13C-d3
CAT No: VS-L102025
CAS No: 2749393-44-8
Mol.F.: C1913CH16FN8O2D3
Mol.Wt.: 426.4
Status: In Stock
Nintedanib-13CD3
CAT No: VS-L102026
CAS No: NA
Mol.F.: C3013CH30D3N5O4
Mol.Wt.: 543.65
Status: In Stock
5-Methyluridine-1',2',3',4',5'-13C5
CAT No: VS-L102027
CAS No: 159496-17-0
Mol.F.: C513C5H14N2O6
Mol.Wt.: 263.2
Status: Custom Synthesis
rac trans-4-Hydroxy Glyburide-13C,d3
CAT No: VS-L102028
CAS No: 1217639-30-9
Mol.F.: C2213CH25D3ClN3O6S
Mol.Wt.: 514.01
Status: In Stock
rac cis-3-Hydroxy Glyburide-13C,d3
CAT No: VS-L102029
CAS No: 1217848-91-3
Mol.F.: C2213CH25D3ClN3O6S
Mol.Wt.: 514.01
Status: In Stock
Pseudooxynicotine-d4 Nitroso Impurity
CAT No: VS-L102030
CAS No: 764661-24-7
Mol.F.: C10H9D4N3O2
Mol.Wt.: 211.3
Status: Custom Synthesis
N-Nitrosonornicotine-D4
CAT No: VS-L102031
CAS No: 66148-19-4
Mol.F.: C9H7D4N3O
Mol.Wt.: 181.2
Status: Custom Synthesis
4-(Trifluoromethyl)benzoic acid-13C6
CAT No: VS-L102032
CAS No: 2731552-41-1
Mol.F.: C8H5F3O2
Mol.Wt.: 196.08
Status: Custom Synthesis
Tacrolimus-13C,D2
CAT No: VS-L102033
CAS No: 1356841-89-8
Mol.F.: C4313CH67D2NO12
Mol.Wt.: 807.0
Status: Custom Synthesis
9-Aminoacridine-13C6
CAT No: VS-L102034
CAS No: NA
Mol.F.: C713C6H10N2
Mol.Wt.: 200.19
Status: Custom Synthesis
Apalutamide 13CD3
CAT No: VS-L102035
CAS No: NA
Mol.F.: C2013CH12D3F4N5O2S
Mol.Wt.: 481.45
Status: Custom Synthesis
Axitinib-13CD3
CAT No: VS-L102036
CAS No: 1261432-00-1
Mol.F.: C2113CH15D3N4OS
Mol.Wt.: 390.5
Status: Custom Synthesis
Desacetyl Triflusal-13C6
CAT No: VS-L102037
CAS No: 1246817-12-8
Mol.F.: C213C6H5F3O3
Mol.Wt.: 212.07
Status: Custom Synthesis
Triflusal-13C6
CAT No: VS-L102038
CAS No: 1276355-35-1
Mol.F.: C413C6H7F3O4
Mol.Wt.: 254.11
Status: Custom Synthesis
24-Methylenecholesterol-13C,D2
CAT No: VS-L102039
CAS No: NA
Mol.F.: C27 13CH44D2O
Mol.Wt.: 401.67
Status: Custom Synthesis
Omeprazole-13C,D3
CAT No: VS-L102040
CAS No: 1261395-28-1
Mol.F.: C1613CH16D3N3O3S
Mol.Wt.: 349.4
Status: Custom Synthesis
Omeprazole-13C,D3 Sulfone N-Oxide
CAT No: VS-L102041
CAS No: NA
Mol.F.: C1613CH16D3N3O5S
Mol.Wt.: 381.43
Status: Custom Synthesis
Omeprazole Sulfide-13C,D3
CAT No: VS-L102042
CAS No: NA
Mol.F.: C1613CH16D3N3O2S
Mol.Wt.: 333.43
Status: Custom Synthesis
Omeprazole-13C,D3 Sulfone
CAT No: VS-L102043
CAS No: 1261393-28-5
Mol.F.: C1613CH16D3N3O4S
Mol.Wt.: 365.43
Status: Custom Synthesis
Exemestane-13CD4
CAT No: VS-L102044
CAS No: NA
Mol.F.: C1913CH20D4O2
Mol.Wt.: 301.42
Status: Custom Synthesis
Erdosteine-13C4
CAT No: VS-L102045
CAS No: 2748548-92-5
Mol.F.: C413C4H11NO4S2
Mol.Wt.: 253.27
Status: Custom Synthesis
Tiopronin-13C,D3
CAT No: VS-L102046
CAS No: 1189695-13-3
Mol.F.: C413CH6D3NO3S
Mol.Wt.: 167.2
Status: Custom Synthesis
Sacubitril-13C4 Calcium
CAT No: VS-L102047
CAS No: NA
Mol.F.: C2013C4H28NO5.1/2Ca
Mol.Wt.: 434.5
Status: Custom Synthesis
Apixaban Acid-13C,D3
CAT No: VS-L102048
CAS No: NA
Mol.F.: C2413CH21D3N4O5
Mol.Wt.: 464.5
Status: Custom Synthesis
Apixaban 13C D3
CAT No: VS-L102049
CAS No: 1261393-15-0
Mol.F.: C2413CH22D3N5O4
Mol.Wt.: 463.5
Status: Custom Synthesis
24-Methylenecholesterol-13C
CAT No: VS-L102050
CAS No: NA
Mol.F.: C2713CH46O
Mol.Wt.: 399.67
Status: Custom Synthesis
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