-
Your RFQ cart is empty!
API Labeled Standards
Venkatasai is a leading provider of pharmaceutical reference standards, specializing in the supply of high-purity API Labeled Standards 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 API Labeled Standards-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.
7-Amino Clonazepam D4
CAT No: VS-A186159
CAS No: 1215070-96-4
Mol.F.: C15H8D4ClN3O
Mol.Wt.: 289.8
Status: In Stock
3,4-Dihydroxybenzaldehyde-d3
CAT No: VS-A186161
CAS No: 180028-20-0
Mol.F.: C7H3D3O3
Mol.Wt.: 141.14
Status: In Stock
(S)-Lercanidipine D3 Hydrochloride
CAT No: VS-A186184
CAS No: 1217740-02-7
Mol.F.: C36H38D3N3O6 : HCl
Mol.Wt.: 614.8 : 36.5
Status: Custom Synthesis
(R)-Lercanidipine-D3 Hydrochloride
CAT No: VS-A186185
CAS No: 1217724-52-1
Mol.F.: C36H38D3N3O6 : HCl
Mol.Wt.: 614.7 : 36.5
Status: Custom Synthesis
1,4-Dinitrosopiperazine-D8
CAT No: VS-A186204
CAS No: 69340-07-4
Mol.F.: C4D8N4O2
Mol.Wt.: 152.2
Status: Custom Synthesis
4-Trans-Hydroxy Cilostazol-D5
CAT No: VS-A186210
CAS No: NA
Mol.F.: C20H22D5N5O3
Mol.Wt.: 390.5
Status: Custom Synthesis
24-Nor Taurolithocholic Acid-D4 Sodium
CAT No: VS-A186211
CAS No: NA
Mol.F.: C25H38D4NNaO5S
Mol.Wt.: 495.68
Status: Custom Synthesis
24-Nor Tauroursodeoxycholic Acid-D4 (major)
CAT No: VS-A186212
CAS No: NA
Mol.F.: C25H38D4NNaO6S
Mol.Wt.: 511.68
Status: Custom Synthesis
6-Hydroxy Benzbromarone-D5 (major)
CAT No: VS-A186221
CAS No: NA
Mol.F.: C17H7D5Br2O4
Mol.Wt.: 445.11
Status: Custom Synthesis
24-Nor Lithocholic Acid-D4
CAT No: VS-A186222
CAS No: NA
Mol.F.: C23H34D4O3
Mol.Wt.: 366.57
Status: Custom Synthesis
24-Nor Ursodeoxycholic Acid-D4
CAT No: VS-A186223
CAS No: NA
Mol.F.: C23H34D4O4
Mol.Wt.: 382.57
Status: Custom Synthesis
3-Hydroxy-3-methylhexanoic Acid-D5
CAT No: VS-A186231
CAS No: NA
Mol.F.: C7H9D5O3
Mol.Wt.: 151.22
Status: Custom Synthesis
24-Methylenecholesterol-D7
CAT No: VS-A186237
CAS No: 209112-82-3
Mol.F.: C28H39OD7
Mol.Wt.: 405.72
Status: Custom Synthesis
20α/β-Dihydrodydrogesterone-D7 (major) 1:1 mixture
CAT No: VS-A186238
CAS No: NA
Mol.F.: C21H23D7O2
Mol.Wt.: 321.51
Status: Custom Synthesis
17-Desacetyl Norgestimate-D8 (major)
CAT No: VS-A186252
CAS No: NA
Mol.F.: C21H21D8NO2
Mol.Wt.: 335.51
Status: Custom Synthesis
(R)-Cinacalcet-D3
CAT No: VS-A186255
CAS No: 1228567-12-1
Mol.F.: C22H19D3F3N
Mol.Wt.: 360.4
Status: Custom Synthesis
(R)-Cinacalcet-D3 Hydrochloride
CAT No: VS-A186256
CAS No: NA
Mol.F.: C22H19D3F3N : HCl
Mol.Wt.: 360.4 : 36.5
Status: Custom Synthesis
(S)-Cinacalcet-d3
CAT No: VS-A186257
CAS No: NA
Mol.F.: C22H19D3F3N
Mol.Wt.: 360.4
Status: Custom Synthesis
(S)-Cinacalcet-D3 Hydrochloride
CAT No: VS-A186258
CAS No: NA
Mol.F.: C22H19D3F3N : HCl
Mol.Wt.: 360.4 : 36.5
Status: Custom Synthesis
4-(N,N-Diethylaminocarbonyl)methyl-4,4'4,''-Trimethylcurcumin-D3
CAT No: VS-A186261
CAS No: 2673270-28-3
Mol.F.: C30H34D3NO7
Mol.Wt.: 526.64
Status: Custom Synthesis
17-Desacetyl Norgestimate-3-acetate-D6
CAT No: VS-A186276
CAS No: NA
Mol.F.: C23H25D6NO3
Mol.Wt.: 375.54
Status: Custom Synthesis
7α-Methylthio Spironolactone-D3
CAT No: VS-A186280
CAS No: NA
Mol.F.: C23H29D3O3S
Mol.Wt.: 391.56
Status: Custom Synthesis
4-Trifluoromethoxybenzoic Acid-D4
CAT No: VS-A186285
CAS No: NA
Mol.F.: C8HD4F3O3
Mol.Wt.: 210.14
Status: Custom Synthesis
21-Desacetyl Deflazacort-D5
CAT No: VS-A186287
CAS No: NA
Mol.F.: C23H24D5NO5
Mol.Wt.: 404.52
Status: Custom Synthesis
3-Deoxy Chlorthalidone-D4
CAT No: VS-A186290
CAS No: NA
Mol.F.: C14H7ClN2O3SD4
Mol.Wt.: 326.79
Status: Custom Synthesis
20β-Dihydrodydrogesterone-D7
CAT No: VS-A186291
CAS No: NA
Mol.F.: C21H23D7O2
Mol.Wt.: 321.51
Status: Custom Synthesis
5α/6α-Hydroxy Lurasidone-D8
CAT No: VS-A186295
CAS No: NA
Mol.F.: C28H28D8N4O3S
Mol.Wt.: 516.73
Status: Custom Synthesis
6α-Methylprednisolone-17-Propionate-D6
CAT No: VS-A186297
CAS No: NA
Mol.F.: C25H28D6O6
Mol.Wt.: 436.58
Status: Custom Synthesis
1β-Hydroxyglycodeoxycholic Acid-D4
CAT No: VS-A186305
CAS No: NA
Mol.F.: C26H39D4NO6
Mol.Wt.: 469.66
Status: Custom Synthesis
1ß-Hydroxytaurodeoxycholic Acid-D4 Sodium
CAT No: VS-A186306
CAS No: NA
Mol.F.: C26H40D4NNaO7S
Mol.Wt.: 541.65
Status: Custom Synthesis
6α-Methylprednisolone-21-Acetate-D6
CAT No: VS-A186313
CAS No: NA
Mol.F.: C24H26D6O6
Mol.Wt.: 422.55
Status: Custom Synthesis
6α-Methylprednisolone-D6
CAT No: VS-A186315
CAS No: NA
Mol.F.: C22H24D6O5
Mol.Wt.: 380.51
Status: Custom Synthesis
17-Desacetyl Norgestimate D6
CAT No: VS-A186320
CAS No: 1263184-13-9
Mol.F.: C21H23D6NO2
Mol.Wt.: 333.5
Status: Custom Synthesis
3β-Chenodeoxycholic Acid-D4
CAT No: VS-A186325
CAS No: NA
Mol.F.: C24H36D4O4
Mol.Wt.: 396.6
Status: Custom Synthesis
3β-Deoxycholic Acid-D4
CAT No: VS-A186328
CAS No: NA
Mol.F.: C24H36D4O4
Mol.Wt.: 396.6
Status: Custom Synthesis
1β-Hydroxydeoxycholic Acid-D4
CAT No: VS-A186331
CAS No: 2089602-33-3
Mol.F.: C24H36D4O5
Mol.Wt.: 412.53
Status: Custom Synthesis
3-Hydroxy-3-Methylpentanoic Acid-D5
CAT No: VS-A186332
CAS No: NA
Mol.F.: C6H7D5O3
Mol.Wt.: 137.19
Status: Custom Synthesis
3β-Lithocholic Acid-D4
CAT No: VS-A186335
CAS No: NA
Mol.F.: C24H36D4O3
Mol.Wt.: 380.6
Status: Custom Synthesis
3β-Ursodeoxycholic Acid-D4
CAT No: VS-A186340
CAS No: NA
Mol.F.: C24H36D4O4
Mol.Wt.: 396.6
Status: Custom Synthesis
4′,4″-O,O-Dimethylcurcumin-D6
CAT No: VS-A186373
CAS No: NA
Mol.F.: C23H18D6O6
Mol.Wt.: 402.48
Status: Custom Synthesis
17β-Estradiol-17-valerate-D4
CAT No: VS-A186376
CAS No: NA
Mol.F.: C23H28D4O3
Mol.Wt.: 360.53
Status: Custom Synthesis
7-Hydroxy Loxapine D8
CAT No: VS-A186390
CAS No: NA
Mol.F.: C18H10D8ClN3O2
Mol.Wt.: 351.86
Status: Custom Synthesis
8-Hydroxy Loxapine D8
CAT No: VS-A186391
CAS No: NA
Mol.F.: C18H10D8ClN3O2
Mol.Wt.: 351.86
Status: Custom Synthesis
4,4,5,5-Tetramethyl-2-(phenyl-d5)-1,3,2-dioxaborolane
CAT No: VS-A186401
CAS No: 245043-33-8
Mol.F.: C12H12BD5O2
Mol.Wt.: 209.1
Status: Custom Synthesis
4,4,5,5-tetramethyl-2-(4-(methyl-d3)phenyl)-1,3,2-dioxaborolane
CAT No: VS-A186402
CAS No: 2235417-07-7
Mol.F.: C13H16BD3O2
Mol.Wt.: 221.12
Status: Custom Synthesis
1-Bromo-3-iodobenzene-d4
CAT No: VS-A186403
CAS No: 2363787-31-7
Mol.F.: C6BrD4I
Mol.Wt.: 286.93
Status: Custom Synthesis
1-bromo-4-iodo-2,3,5,6-tetradeuteriumbenzene
CAT No: VS-A186404
CAS No: 1147565-46-5
Mol.F.: C6D4BrI
Mol.Wt.: 286.93
Status: Custom Synthesis
3-Chlorofluorobenzene-d4
CAT No: VS-A186405
CAS No: 50592-34-2
Mol.F.: C6ClD4F
Mol.Wt.: 134.57
Status: Custom Synthesis
4-bromobenzen-2,3,5,6-d4-amine
CAT No: VS-A186406
CAS No: 61357-76-4
Mol.F.: C6H2D4BrN
Mol.Wt.: 176.05
Status: Custom Synthesis
4-Bromobiphenyl-d9
CAT No: VS-A186407
CAS No: 142475-00-1
Mol.F.: C12BrD9
Mol.Wt.: 242.16
Status: Custom Synthesis
3-bromo-1,1'-biphenyl-2,2',3',4,4',5,5',6,6'-d9
CAT No: VS-A186408
CAS No: 2363789-28-8
Mol.F.: C12BrD9
Mol.Wt.: 242.16
Status: Custom Synthesis
9-Bromoanthracene-d9
CAT No: VS-A186411
CAS No: 183486-02-4
Mol.F.: C14D9Br
Mol.Wt.: 266.18
Status: Custom Synthesis
(10-phenylanthracen-9-yl-1,2,3,4,5,6,7,8-d8)boronic acid
CAT No: VS-A186412
CAS No: NA
Mol.F.: C20H7D8BO2
Mol.Wt.: 306.2
Status: Custom Synthesis
(10-(phenyl-d5)anthracen-9-yl-1,2,3,4,5,6,7,8-d8)boronic acid
CAT No: VS-A186413
CAS No: NA
Mol.F.: C20H2D13BO2
Mol.Wt.: 311.23
Status: Custom Synthesis
(10-(naphthalen-1-yl)anthracen-9-yl-1,2,3,4,5,6,7,8-d8)boronic acid
CAT No: VS-A186414
CAS No: NA
Mol.F.: C24H9D8BO2
Mol.Wt.: 356.26
Status: Custom Synthesis
(10-(naphthalen-1-yl-d7)anthracen-9-yl-1,2,3,4,5,6,7,8-d8)boronic acid
CAT No: VS-A186415
CAS No: NA
Mol.F.: C24H2D15BO2
Mol.Wt.: 363.3
Status: Custom Synthesis
(10-(phenyl-d5)anthracen-9-yl)boronic acid
CAT No: VS-A186416
CAS No: NA
Mol.F.: C20H10D5BO2
Mol.Wt.: 303.18
Status: Custom Synthesis
9-(naphthalen-1-yl-d7)anthracene-1,2,3,4,5,6,7,8,10-d9
CAT No: VS-A186417
CAS No: 2414168-77-5
Mol.F.: C24D16
Mol.Wt.: 320.48
Status: Custom Synthesis
9-Bromo-10-(1-naphthalenyl-2,3,4,5,6,7,8-d7)anthracene-1,2,3,4,5,6,7,8-d8
CAT No: VS-A186418
CAS No: 2330770-73-3
Mol.F.: C24BrD15
Mol.Wt.: 398.37
Status: Custom Synthesis
3-chloro-9H-carbazole-1,2,4,5,6,7,8-d7
CAT No: VS-A186420
CAS No: 2763256-81-9
Mol.F.: C12HClD7N
Mol.Wt.: 208.7
Status: Custom Synthesis
2-Bromo-9-(phenyl-2,3,4,5,6-d5)-9H-carbazole
CAT No: VS-A186421
CAS No: 1807910-48-0
Mol.F.: C18H7BrD5N
Mol.Wt.: 327.23
Status: Custom Synthesis
3-Bromo-9-(phenyl-2,3,4,5,6-d5)-9H-carbazole
CAT No: VS-A186422
CAS No: 1345614-91-6
Mol.F.: C18H7BrD5N
Mol.Wt.: 327.23
Status: Custom Synthesis
(2-(9H-carbazol-9-yl-d8)phenyl-3,4,5,6-d4)boronic acid
CAT No: VS-A186423
CAS No: 2778147-31-0
Mol.F.: C18H2BD12NO2
Mol.Wt.: 299.19
Status: Custom Synthesis
2-(phenyl-d5)-9H-carbazole-1,3,4,5,6,7,8-d7
CAT No: VS-A186424
CAS No: 2907762-28-9
Mol.F.: C18HD12N
Mol.Wt.: 255.38
Status: Custom Synthesis
3-(phenyl d5)-9H-carbazole 1,2,4,5,6,7,8-d7
CAT No: VS-A186425
CAS No: 2851075-04-0
Mol.F.: C18HD12N
Mol.Wt.: 255.38
Status: Custom Synthesis
2-([1,1'-biphenyl]-3-yl-d9)-9H-carbazole-1,3,4,5,6,7,8-d7
CAT No: VS-A186426
CAS No: NA
Mol.F.: C24HD16N
Mol.Wt.: 335.5
Status: Custom Synthesis
8-bromo-1-chlorodibenzo[b,d]furan-2,3,4,6,7,9-d6
CAT No: VS-A186427
CAS No: 2809996-22-1
Mol.F.: C12BrClD6O
Mol.Wt.: 287.57
Status: Custom Synthesis
2-(dibenzo[b,d]furan-3-yl-d7)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAT No: VS-A186428
CAS No: 2869878-99-7
Mol.F.: C18H12BD7O3
Mol.Wt.: 301.2
Status: Custom Synthesis
2-(dibenzo[b,d]furan-1-yl-d7)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAT No: VS-A186429
CAS No: 2865889-34-3
Mol.F.: C18H12BD7O3
Mol.Wt.: 301.2
Status: Custom Synthesis
4,4,5,5-tetramethyl-2-(6-(phenyl-d5)dibenzo[b,d]furan-3-yl-1,2,4,7,8,9-d6)-1,3,2-dioxaborolane
CAT No: VS-A186430
CAS No: NA
Mol.F.: C24H12D11BO3
Mol.Wt.: 381.32
Status: Custom Synthesis
4,4,5,5-tetramethyl-2-(9-(phenyl-d5)dibenzo[b,d]furan-3-yl-1,2,4,6,7,8-d6)-1,3,2-dioxaborolane
CAT No: VS-A186431
CAS No: 2765518-22-5
Mol.F.: C24H12BD11O3
Mol.Wt.: 381.32
Status: Custom Synthesis
2-Chloro-4,6-bis(phenyl-d5)-1,3,5-triazine
CAT No: VS-A186432
CAS No: 1300115-09-6
Mol.F.: C15D10ClN3
Mol.Wt.: 277.78
Status: Custom Synthesis
2-(4-bromophenyl-2,3,5,6-d4)-4,6-bis(phenyl-d5)-1,3,5-triazine
CAT No: VS-A186433
CAS No: 2569012-82-2
Mol.F.: C21H14BrN3
Mol.Wt.: 388.27
Status: Custom Synthesis
2,4-dichloro-6-(phenyl-d5)-1,3,5-triazine
CAT No: VS-A186434
CAS No: 1480589-62-5
Mol.F.: C9Cl2D5N3
Mol.Wt.: 231.09
Status: Custom Synthesis
4,4,5,5-tetramethyl-2-(6-(phenyl-d5)dibenzo[b,d]thiophen-4-yl-1,2,3,7,8,9-d6)-1,3,2-dioxaborolane
CAT No: VS-A186435
CAS No: NA
Mol.F.: C24H12D11BO2S
Mol.Wt.: 397.38
Status: Custom Synthesis
3-chloro-1,1':3',1''-terphenyl-2,2',2'',3'',4,4',4'',5,5',5'',6,6',6''-d13
CAT No: VS-A186436
CAS No: NA
Mol.F.: C18D13Cl
Mol.Wt.: 277.83
Status: Custom Synthesis
9-(4-(tert-butyl)pyridin-2-yl)-9H-carbazol-5,6,7,8-d4-2-ol
CAT No: VS-A186437
CAS No: NA
Mol.F.: C21H16D4N2O
Mol.Wt.: 320.43
Status: Custom Synthesis
[1,1':2',1''-terphenyl]-2,3,5,6-d4-4-amine
CAT No: VS-A186438
CAS No: NA
Mol.F.: C18H11D4N
Mol.Wt.: 249.35
Status: Custom Synthesis
1-(4-chlorophenyl-2,3,5,6-d4)-2-phenylnaphthalene
CAT No: VS-A186439
CAS No: NA
Mol.F.: C22H11D4Cl
Mol.Wt.: 318.84
Status: Custom Synthesis
1-chloro-8-(phenyl-d5)dibenzo[b,d]furan-2,3,4,6,7,9-d6
CAT No: VS-A186440
CAS No: 2770667-39-3
Mol.F.: C18ClD11O
Mol.Wt.: 289.8
Status: Custom Synthesis
4-(2,2-dimethylpropyl-1,1-d2)pyridine
CAT No: VS-A186441
CAS No: NA
Mol.F.: C10H13D2N
Mol.Wt.: 151.25
Status: Custom Synthesis
4-(methyl-d3)-2-phenyl-5-(trimethylsilyl)pyridine
CAT No: VS-A186442
CAS No: 2742672-22-4
Mol.F.: C15H16D3NSi
Mol.Wt.: 244.42
Status: Custom Synthesis
2-(4-bromo-1-(5-(tert-butyl)-[1,1'-biphenyl]-2-yl)-1H-benzo[d]imidazol-2-yl)-4,6-bis(2-(methyl-d3)propan-2-yl-1,1,1,3,3,3-d6)phenol
CAT No: VS-A186443
CAS No: NA
Mol.F.: C37H23D18BrN2O
Mol.Wt.: 627.76
Status: Custom Synthesis
3-([1,1':3',1''-terphenyl]-2'-yl-2,2'',3,3'',4,4'',5,5'',6,6''-d10)-1-(3-((9-(4-(tert-butyl)pyridin-2-yl)-9H-carbazol-2-yl)oxy)phenyl)-1H-benzo[d]imidazol-3-ium
CAT No: VS-A186444
CAS No: NA
Mol.F.: C52H31D10ClN4O
Mol.Wt.: 783.44
Status: Custom Synthesis
4-(tert-butyl)-2-(2-(methyl-d3)propan-2-yl-1,1,1,3,3,3-d6)phenol
CAT No: VS-A186447
CAS No: 2342594-40-3
Mol.F.: C14H13D9O
Mol.Wt.: 215.38
Status: Custom Synthesis
1-(4-chloro-6-(2,5-dimethyl-1H-pyrrol-1-yl)pyridin-3-yl)propan-1-one-3,3,3-d3
CAT No: VS-A186448
CAS No: NA
Mol.F.: C14H12D3ClN2O
Mol.Wt.: 265.76
Status: Custom Synthesis
7-Methoxycoumarin-D3
CAT No: VS-A186452
CAS No: NA
Mol.F.: C12H7D3O5
Mol.Wt.: 237.22
Status: Custom Synthesis
4-Hydroxy-3-methoxymandelic Acid-D3
CAT No: VS-A186475
CAS No: 74495-70-8
Mol.F.: C9H7D3O5
Mol.Wt.: 201.19
Status: Custom Synthesis
3,3',5,5'-Tetrabromobisphenol A-d10
CAT No: VS-A186486
CAS No: 2732834-96-5
Mol.F.: C15H2Br4D10O2
Mol.Wt.: 553.93
Status: Custom Synthesis
1-Bromo-4-nitrobenzene-D4
CAT No: VS-A186492
CAS No: 350820-19-8
Mol.F.: C6D4BrNO2
Mol.Wt.: 206.03
Status: Custom Synthesis
4-Nitrobenzonitrile D4
CAT No: VS-A186493
CAS No: 1219798-46-5
Mol.F.: C7D4N2O2
Mol.Wt.: 152.15
Status: Custom Synthesis
4-Nitrobenzoic Acid-d4
CAT No: VS-A186494
CAS No: 171777-66-5
Mol.F.: C7HD4NO4
Mol.Wt.: 171.14
Status: Custom Synthesis
4-Nitrobenzaldehyde-D5
CAT No: VS-A186495
CAS No: NA
Mol.F.: C7H5NO3
Mol.Wt.: 156.15
Status: Custom Synthesis
2,4-Dinitrophenylhydrazine-D3
CAT No: VS-A186500
CAS No: 259824-49-2
Mol.F.: C6H3D3N4O4
Mol.Wt.: 201.15
Status: Custom Synthesis
2-Propanol-1,1,1,3,3,3-d6
CAT No: VS-A186501
CAS No: 3976-29-2
Mol.F.: C3H2D6O
Mol.Wt.: 66.13
Status: Custom Synthesis
2-Bromopropane-d6
CAT No: VS-A186502
CAS No: 52809-76-4
Mol.F.: C3HD6Br
Mol.Wt.: 129.03
Status: Custom Synthesis
4-Methoxybenzenemethanamine-D3
CAT No: VS-A186508
CAS No: NA
Mol.F.: C8H8D3NO
Mol.Wt.: 140.2
Status: Custom Synthesis
(bromomethyl-d)benzene
CAT No: VS-A186512
CAS No: 66343-88-2
Mol.F.: C7H6BrD
Mol.Wt.: 172.04
Status: Custom Synthesis
2,2'-Dipyridyl D8
CAT No: VS-A186514
CAS No: 32190-42-4
Mol.F.: C10D8N2
Mol.Wt.: 164.23
Status: Custom Synthesis
4,4'-Dipyridyl D8
CAT No: VS-A186515
CAS No: 132125-39-4
Mol.F.: C10D8N2
Mol.Wt.: 164.24
Status: Custom Synthesis
接觸
040-23076623, 040-4852 9278
電子郵件