Labelled stable isotope standards-API'S & API Impurities

    Labelled stable isotope standards-API'S & API Impurities Related Products

    Venkatasai is a leading innovator in the field of pharmaceutical reference standards, offering high-quality Reference Standards of Abacavir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamines (N-NO products). Our Abacavir impurity reference standards play a vital role in pharmaceutical research, supporting product development, ANDA and DMF filings, quality control (QC), method validation, and stability studies. They are also instrumental in identifying unknown impurities and evaluating genotoxic potential. All Abacavir-related products are thoroughly characterized and supplied with comprehensive Certificates of Analysis (COA) and analytical data that comply with regulatory standards. EP/USP traceable standards can also be provided upon request. Furthermore, all supplied products undergo periodic re-testing to ensure continued quality and reliability.

    15N-Nitroso Terbutaline

    Picture of 15N-Nitroso Terbutaline
    CAT No: VS-L102068
    CAS No: NA
    Mol.F.: C12H18N15NO4
    Mol.Wt.: 255.28
    Status: Custom Synthesis

    1-Amino Hydantoin-13C3

    Picture of 1-Amino Hydantoin-13C3
    CAT No: VS-L102063
    CAS No: 957509-31-8
    Mol.F.: 13C3H5N3O2
    Mol.Wt.: 118.07
    Status: Custom Synthesis

    2′-Fluoro-2'-deoxyuridine-5,6-d2

    Picture of 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

    24-Methylenecholesterol-13C

    Picture of 24-Methylenecholesterol-13C
    CAT No: VS-L102050
    CAS No: NA
    Mol.F.: C2713CH46O
    Mol.Wt.: 399.67
    Status: Custom Synthesis

    24-Methylenecholesterol-13C,D2

    Picture of 24-Methylenecholesterol-13C,D2
    CAT No: VS-L102039
    CAS No: NA
    Mol.F.: C27 13CH44D2O
    Mol.Wt.: 401.67
    Status: Custom Synthesis

    2-Chloro-4-ethylamino-15N-6-isopropylamino-1,3,5-triazine

    Picture of 2-Chloro-4-ethylamino-15N-6-isopropylamino-1,3,5-triazine
    CAT No: VS-L102058
    CAS No: 287476-17-9
    Mol.F.: C8H14ClN415N
    Mol.Wt.: 216.68
    Status: Custom Synthesis

    2'-Deoxyuridine-13C,15N2

    Picture of 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

    Picture of 2'-Deoxyuridine-5,6 D2
    CAT No: VS-L102005
    CAS No: 40632-23-3
    Mol.F.: C9H10D2N2O5
    Mol.Wt.: 230.22
    Status: In Stock

    2-NP-AHD-13C3

    Picture of 2-NP-AHD-13C3
    CAT No: VS-L102064
    CAS No: 1007476-86-9
    Mol.F.: C713C3H8N4O4
    Mol.Wt.: 251.18
    Status: Custom Synthesis

    4-(Trifluoromethyl)benzoic acid-13C6

    Picture of 4-(Trifluoromethyl)benzoic acid-13C6
    CAT No: VS-L102032
    CAS No: 2731552-41-1
    Mol.F.: C8H5F3O2
    Mol.Wt.: 196.08
    Status: Custom Synthesis

    5,6-Dihydro Thymine-d6

    Picture of 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

    Picture of 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

    5-Methyl Uridine-d4

    Picture of 5-Methyl Uridine-d4
    CAT No: VS-L102010
    CAS No: 82845-85-0
    Mol.F.: C10H10D4N2O6
    Mol.Wt.: 262.25
    Status: In Stock

    5-Methyl-d3-cytosine-6-d1

    Picture of 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-Methyluridine-1',2',3',4',5'-13C5

    Picture of 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

    9-Aminoacridine-13C6

    Picture of 9-Aminoacridine-13C6
    CAT No: VS-L102034
    CAS No: NA
    Mol.F.: C713C6H10N2
    Mol.Wt.: 200.19
    Status: Custom Synthesis

    Adenine-2- D1

    Picture of 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

    Picture of Adenosine-2 D1
    CAT No: VS-L102001
    CAS No: 109923-50-4
    Mol.F.: C10H12DN5O4
    Mol.Wt.: 268.25
    Status: In Stock

    Ammonium-15N Chloride

    Picture of Ammonium-15N Chloride
    CAT No: VS-L102053
    CAS No: 39466-62-1
    Mol.F.: ClH415N
    Mol.Wt.: 54.48
    Status: Custom Synthesis

    Ammonium-15N hydroxide

    Picture of Ammonium-15N hydroxide
    CAT No: VS-L102054
    CAS No: 62948-80-5
    Mol.F.: H5NO
    Mol.Wt.: 36.04
    Status: Custom Synthesis

    Apalutamide 13CD3

    Picture of Apalutamide 13CD3
    CAT No: VS-L102035
    CAS No: NA
    Mol.F.: C2013CH12D3F4N5O2S
    Mol.Wt.: 481.45
    Status: Custom Synthesis

    Apixaban 13C D3

    Picture of Apixaban 13C D3
    CAT No: VS-L102049
    CAS No: 1261393-15-0
    Mol.F.: C2413CH22D3N5O4
    Mol.Wt.: 463.5
    Status: Custom Synthesis

    Apixaban Acid-13C,D3

    Picture of Apixaban Acid-13C,D3
    CAT No: VS-L102048
    CAS No: NA
    Mol.F.: C2413CH21D3N4O5
    Mol.Wt.: 464.5
    Status: Custom Synthesis

    Axitinib-13CD3

    Picture of Axitinib-13CD3
    CAT No: VS-L102036
    CAS No: 1261432-00-1
    Mol.F.: C2113CH15D3N4OS
    Mol.Wt.: 390.5
    Status: Custom Synthesis

    Benzoic Acid-13C6

    Picture of Benzoic Acid-13C6
    CAT No: VS-L102051
    CAS No: 125945-98-4
    Mol.F.: C13C6H6O2
    Mol.Wt.: 128.08
    Status: Custom Synthesis

    Carbocisteine-13C3

    Picture of Carbocisteine-13C3
    CAT No: VS-L102069
    CAS No: 1391068-19-1
    Mol.F.: C213C3H9NO4S
    Mol.Wt.: 182.2
    Status: Custom Synthesis

    Cytidine-5,6 D2

    Picture of 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

    Picture of Cytosine-5,6 D2
    CAT No: VS-L102003
    CAS No: 106391-24-6
    Mol.F.: C4H3D2N3O
    Mol.Wt.: 113.12
    Status: In Stock

    Desacetyl Triflusal-13C6

    Picture of Desacetyl Triflusal-13C6
    CAT No: VS-L102037
    CAS No: 1246817-12-8
    Mol.F.: C213C6H5F3O3
    Mol.Wt.: 212.07
    Status: Custom Synthesis

    Efinaconazole 13CD2

    Picture of Efinaconazole 13CD2
    CAT No: VS-L102020
    CAS No: NA
    Mol.F.: C1713CH20D2F2N4O
    Mol.Wt.: 351.4
    Status: In Stock

    Efinaconazole 13CD6

    Picture of Efinaconazole 13CD6
    CAT No: VS-L102021
    CAS No: NA
    Mol.F.: C1713CH16D6F2N4O
    Mol.Wt.: 355.43
    Status: In Stock

    Erdosteine-13C4

    Picture of Erdosteine-13C4
    CAT No: VS-L102045
    CAS No: 2748548-92-5
    Mol.F.: C413C4H11NO4S2
    Mol.Wt.: 253.27
    Status: Custom Synthesis

    Exemestane-13CD4

    Picture of Exemestane-13CD4
    CAT No: VS-L102044
    CAS No: NA
    Mol.F.: C1913CH20D4O2
    Mol.Wt.: 301.42
    Status: Custom Synthesis

    Flumequine-13C3

    Picture of Flumequine-13C3
    CAT No: VS-L102066
    CAS No: 1185049-09-5
    Mol.F.: C1113C3H12FNO3
    Mol.Wt.: 264.23
    Status: Custom Synthesis

    Hydrochlorothiazide 15N2,13CD2

    Picture of Hydrochlorothiazide 15N2,13CD2
    CAT No: VS-L102023
    CAS No: NA
    Mol.F.: C613CH6D2ClN15N2O4S2
    Mol.Wt.: 302.73
    Status: In Stock

    Iodomethane-13C

    Picture of Iodomethane-13C
    CAT No: VS-L102052
    CAS No: 4227-95-6
    Mol.F.: 13CH3I
    Mol.Wt.: 142.93
    Status: Custom Synthesis

    Mequindox-13C6

    Picture of Mequindox-13C6
    CAT No: VS-L102067
    CAS No: NA
    Mol.F.: 13C6C5H10N2O3
    Mol.Wt.: 224.16
    Status: Custom Synthesis

    Methylamine-15N Hydrochloride

    Picture of Methylamine-15N Hydrochloride
    CAT No: VS-L102057
    CAS No: 3852-22-0
    Mol.F.: CH6Cl15N
    Mol.Wt.: 68.51
    Status: Custom Synthesis

    Nintedanib-13CD3

    Picture of Nintedanib-13CD3
    CAT No: VS-L102026
    CAS No: NA
    Mol.F.: C3013CH30D3N5O4
    Mol.Wt.: 543.65
    Status: In Stock

    Nitrofurantoin-13C3

    Picture of Nitrofurantoin-13C3
    CAT No: VS-L102065
    CAS No: 1217226-46-4
    Mol.F.: C513C3H6N4O5
    Mol.Wt.: 241.1
    Status: Custom Synthesis

    N-Nitrosonornicotine-D4

    Picture of N-Nitrosonornicotine-D4
    CAT No: VS-L102031
    CAS No: 66148-19-4
    Mol.F.: C9H7D4N3O
    Mol.Wt.: 181.2
    Status: Custom Synthesis

    Omeprazole Sulfide-13C,D3

    Picture of Omeprazole Sulfide-13C,D3
    CAT No: VS-L102042
    CAS No: NA
    Mol.F.: C1613CH16D3N3O2S
    Mol.Wt.: 333.43
    Status: Custom Synthesis

    Omeprazole-13C,D3

    Picture of 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

    Picture of Omeprazole-13C,D3 Sulfone
    CAT No: VS-L102043
    CAS No: 1261393-28-5
    Mol.F.: C1613CH16D3N3O4S   
    Mol.Wt.:  365.43
    Status: Custom Synthesis

    Omeprazole-13C,D3 Sulfone N-Oxide

    Picture of Omeprazole-13C,D3 Sulfone N-Oxide
    CAT No: VS-L102041
    CAS No: NA
    Mol.F.: C1613CH16D3N3O5S
    Mol.Wt.: 381.43
    Status: Custom Synthesis

    Ondansetron 13CD3

    Picture of Ondansetron 13CD3
    CAT No: VS-L102022
    CAS No: NA
    Mol.F.: C1713CH16D3N3O
    Mol.Wt.: 297.38
    Status: In Stock

    Phthalimide-15N

    Picture of Phthalimide-15N
    CAT No: VS-L102055
    CAS No: NA
    Mol.F.: C8H515NO2
    Mol.Wt.: 148.13
    Status: Custom Synthesis

    Phthalimide-15N Potassium Salt

    Picture of Phthalimide-15N Potassium Salt
    CAT No: VS-L102056
    CAS No: 53510-88-6
    Mol.F.: C8H4K15NO2
    Mol.Wt.: 186.21
    Status: Custom Synthesis

    Pseudooxynicotine-d4 Nitroso Impurity

    Picture of Pseudooxynicotine-d4 Nitroso Impurity
    CAT No: VS-L102030
    CAS No: 764661-24-7
    Mol.F.: C10H9D4N3O2
    Mol.Wt.: 211.3
    Status: Custom Synthesis

    rac cis-3-Hydroxy Glyburide-13C,d3

    Picture of 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

    rac trans-4-Hydroxy Glyburide-13C,d3

    Picture of 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

    Riociguat-13C-d3

    Picture of Riociguat-13C-d3
    CAT No: VS-L102025
    CAS No: 2749393-44-8
    Mol.F.: C1913CH16FN8O2D3 
    Mol.Wt.: 426.4
    Status: In Stock

    Sacubitril-13C4 Calcium

    Picture of Sacubitril-13C4 Calcium
    CAT No: VS-L102047
    CAS No: NA
    Mol.F.: C2013C4H28NO5.1/2Ca
    Mol.Wt.: 434.5
    Status: Custom Synthesis

    Semicarbazide-13C,15N2 Hydrochloride

    Picture of Semicarbazide-13C,15N2 Hydrochloride
    CAT No: VS-L102062
    CAS No: 1173020-16-0
    Mol.F.: 13CH6ClN15N2O
    Mol.Wt.: 114.51
    Status: Custom Synthesis

    Sulfadiazine-13C6

    Picture of Sulfadiazine-13C6
    CAT No: VS-L102059
    CAS No: 1189426-16-1
    Mol.F.: C413C6H10N4O2S
    Mol.Wt.: 256.23
    Status: Custom Synthesis

    Sulfamethazine-13C6

    Picture of Sulfamethazine-13C6
    CAT No: VS-L102061
    CAS No: 77643-91-5
    Mol.F.: C613C6H14N4O2S
    Mol.Wt.: 284.28
    Status: Custom Synthesis

    Sulfamethoxazole-13C6

    Picture of Sulfamethoxazole-13C6
    CAT No: VS-L102060
    CAS No: 1196157-90-0
    Mol.F.: C413C6H11N3O3S
    Mol.Wt.: 259.23
    Status: Custom Synthesis

    Tacrolimus-13C,D2

    Picture of Tacrolimus-13C,D2
    CAT No: VS-L102033
    CAS No: 1356841-89-8
    Mol.F.: C4313CH67D2NO12
    Mol.Wt.: 807.0
    Status: Custom Synthesis

    Tacrolimus-13C-D4

    Picture of Tacrolimus-13C-D4
    CAT No: VS-L102024
    CAS No: NA
    Mol.F.: C4313CH65D4NO12
    Mol.Wt.: 809.04
    Status: In Stock

    Thymidine-alpha,alpha,alpha,6D4

    Picture of 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

    Picture of 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

    Tiopronin-13C,D3

    Picture of Tiopronin-13C,D3
    CAT No: VS-L102046
    CAS No: 1189695-13-3
    Mol.F.: C413CH6D3NO3S
    Mol.Wt.: 167.2
    Status: Custom Synthesis

    Triflusal-13C6

    Picture of Triflusal-13C6
    CAT No: VS-L102038
    CAS No: 1276355-35-1
    Mol.F.: C413C6H7F3O4
    Mol.Wt.: 254.11
    Status: Custom Synthesis

    Uracil D4

    Picture of Uracil D4
    CAT No: VS-L102017
    CAS No: 24897-55-0
    Mol.F.: C4D4N2O2
    Mol.Wt.: 116.11
    Status: In Stock

    Uracil-1,3-d2

    Picture of 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

    Picture of Uracil-5,6-d2
    CAT No: VS-L102016
    CAS No: 24897-52-7
    Mol.F.: C4H2D2N2O2
    Mol.Wt.: 114.1
    Status: In Stock

    Uracil-5-d1

    Picture of 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

    Picture of Uracil-6-d1
    CAT No: VS-L102014
    CAS No: 24897-51-6
    Mol.F.: C4H3DN2O2
    Mol.Wt.: 113.09
    Status: In Stock

    Uridine-2-13C

    Picture of 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

    Picture of Uridine-5,6 D2
    CAT No: VS-L102019
    CAS No: 40632-21-1
    Mol.F.: C9H10D2N2O6
    Mol.Wt.: 246.22
    Status: In Stock