-
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.
Carvedilol-d4
CAT No: VS-A186027
CAS No: 1133705-56-2
Mol.F.: C24H26N2O4
Mol.Wt.: 410.5
Status: In Stock
Cilostazol-D11
CAT No: VS-A186029
CAS No: 1073608-02-2
Mol.F.: C20H16D11N5O2
Mol.Wt.: 380.52
Status: In Stock
Citalopram Hydrobromide-D3
CAT No: VS-A186030
CAS No: NA
Mol.F.: C20H19D3BrFN2O
Mol.Wt.: 408.33
Status: In Stock
Cyclizine D3
CAT No: VS-A186031
CAS No: 1170155-67-5
Mol.F.: C18H19D3N2
Mol.Wt.: 269.41
Status: In Stock
Cyclosporin D4
CAT No: VS-A186032
CAS No: NA
Mol.F.: C62H107D4N11O12
Mol.Wt.: 1206.64
Status: In Stock
Cyproterone Acetate D3
CAT No: VS-A186033
CAS No: NA
Mol.F.: C24H26D3ClO4
Mol.Wt.: 419.96
Status: In Stock
Dabigatran D4
CAT No: VS-A186034
CAS No: 1618637-32-3
Mol.F.: C25H21D4N7O3
Mol.Wt.: 475.54
Status: In Stock
Daclatasvir-D6
CAT No: VS-A186035
CAS No: 1801709-41-0
Mol.F.: C40H44D6N8O6
Mol.Wt.: 744.91
Status: In Stock
Dapagliflozin-D5
CAT No: VS-A186036
CAS No: 1204219-80-6
Mol.F.: C21H20D5ClO6
Mol.Wt.: 413.9
Status: In Stock
Darolutamide D4
CAT No: VS-A186037
CAS No: NA
Mol.F.: C19H15D4ClN6O2
Mol.Wt.: 402.9
Status: In Stock
Dasatinib-d4
CAT No: VS-A186038
CAS No: 1160297-08-4
Mol.F.: C22H22D4ClN7O2S
Mol.Wt.: 492.01
Status: In Stock
Deferasirox-d4
CAT No: VS-A186039
CAS No: 1133425-75-8
Mol.F.: C21H11D4N3O4
Mol.Wt.: 377.39
Status: In Stock
Diazoxide-d3
CAT No: VS-A186041
CAS No: 1432063-51-8
Mol.F.: C8H4D3ClN2O2S
Mol.Wt.: 233.69
Status: In Stock
Digoxin D3
CAT No: VS-A186042
CAS No: 127299-95-0
Mol.F.: C41H61O14D3
Mol.Wt.: 783.96
Status: In Stock
Diltiazem D4
CAT No: VS-A186043
CAS No: 112259-41-3
Mol.F.: C22H22D4N2O4S
Mol.Wt.: 418.5
Status: In Stock
Dipyridamole D20
CAT No: VS-A186044
CAS No: 1189983-52-5
Mol.F.: C24H20D20N8O4
Mol.Wt.: 524.8
Status: In Stock
Domperidone D6
CAT No: VS-A186045
CAS No: 1329614-18-7
Mol.F.: C22H18D6ClN5O2
Mol.Wt.: 432
Status: In Stock
Doxazosin D8
CAT No: VS-A186046
CAS No: 1126848-44-9
Mol.F.: C23H17D8N5O5
Mol.Wt.: 459.5
Status: In Stock
Edoxaban D6
CAT No: VS-A186048
CAS No: 1304701-57-2
Mol.F.: C24H24D6ClN7O4S
Mol.Wt.: 554.1
Status: In Stock
Eliglustat – D15
CAT No: VS-A186050
CAS No: NA
Mol.F.: C23H21D15N2O4
Mol.Wt.: 419.64
Status: In Stock
Enzalutamide D3
CAT No: VS-A186051
CAS No: 1443331-82-5
Mol.F.: C21H13D3F4N4O2S
Mol.Wt.: 467.5
Status: In Stock
Enzalutamide-D6
CAT No: VS-A186052
CAS No: 1443331-94-9
Mol.F.: C21H10D6F4N4O2S
Mol.Wt.: 470.5
Status: In Stock
Erlotinib D6
CAT No: VS-A186053
CAS No: 1034651-23-4
Mol.F.: C22H17D6N3O4
Mol.Wt.: 399.5
Status: In Stock
Escitalopram D3 oxalate
CAT No: VS-A186054
CAS No: NA
Mol.F.: C22H20D3FN2O5
Mol.Wt.: 417.45
Status: In Stock
Clonazepam D4
CAT No: VS-A186158
CAS No: 170082-15-2
Mol.F.: C15H6D4ClN3O3
Mol.Wt.: 319.7
Status: In Stock
Efinaconazole D4
CAT No: VS-A186163
CAS No: NA
Mol.F.: C18H18D4F2N4O
Mol.Wt.: 352.42
Status: In Stock
Colchicine-D6
CAT No: VS-A186168
CAS No: 1217651-73-4
Mol.F.: C22H19D6NO6
Mol.Wt.: 405.5
Status: In Stock
Deucravacitinib
CAT No: VS-A186183
CAS No: 1609392-27-9
Mol.F.: C20H19D3N8O3
Mol.Wt.: 425.47
Status: Custom Synthesis
Cetirizine D4
CAT No: VS-A186191
CAS No: 1219803-84-5
Mol.F.: C21H21D4ClN2O3
Mol.Wt.: 392.9
Status: Custom Synthesis
Eplerenone D3
CAT No: VS-A186205
CAS No: NA
Mol.F.: C24H27D3O6
Mol.Wt.: 417.5
Status: Custom Synthesis
Dydrogesterone-d6
CAT No: VS-A186220
CAS No: NA
Mol.F.: C21H22D6O2
Mol.Wt.: 318.5
Status: Custom Synthesis
COTI-219 D8
CAT No: VS-A186230
CAS No: NA
Mol.F.: C17H10D8N6S
Mol.Wt.: 346.48
Status: Custom Synthesis
Clobetasol 17-Propionate-d5
CAT No: VS-A186241
CAS No: 2280940-18-1
Mol.F.: C25H27D5ClFO5
Mol.Wt.: 472
Status: Custom Synthesis
Cinacalcet D3
CAT No: VS-A186255
CAS No: 1228567-12-1
Mol.F.: C22H19D3F3N
Mol.Wt.: 360.4
Status: Custom Synthesis
Dolutegravir D3
CAT No: VS-A186262
CAS No: 2673270-25-0
Mol.F.: C20H16D3F2N3O5
Mol.Wt.: 422.4
Status: Custom Synthesis
Chlorthalidone D4
CAT No: VS-A186267
CAS No: 1794941-44-8
Mol.F.: C14H7D4ClN2O4S
Mol.Wt.: 342.8
Status: Custom Synthesis
Deflazacort-D7
CAT No: VS-A186286
CAS No: NA
Mol.F.: C25H24D7NO6
Mol.Wt.: 448.57
Status: Custom Synthesis
Deflazacort-D5
CAT No: VS-A186288
CAS No: NA
Mol.F.: C25H26D5NO6
Mol.Wt.: 446.55
Status: Custom Synthesis
Cyclosporin A-D4
CAT No: VS-A186303
CAS No: NA
Mol.F.: C62H107D4N11O12
Mol.Wt.: 1206.7
Status: Custom Synthesis
Dehydro Cyclosporin A-D4
CAT No: VS-A186304
CAS No: NA
Mol.F.: C62H105D4N11O11
Mol.Wt.: 1188.62
Status: Custom Synthesis
Deflazacort-D3
CAT No: VS-A186311
CAS No: 2280940-17-0
Mol.F.: C25H28D3NO6
Mol.Wt.: 444.54
Status: Custom Synthesis
Chenodeoxycholic Acid-D4
CAT No: VS-A186324
CAS No: 99102-69-9
Mol.F.: C24H36D4O4
Mol.Wt.: 396.6
Status: Custom Synthesis
Clonidine D4
CAT No: VS-A186326
CAS No: 62497-68-1
Mol.F.: C9H5D4Cl2N3
Mol.Wt.: 234.1
Status: Custom Synthesis
Delamanid D4
CAT No: VS-A186327
CAS No: 2747917-54-8
Mol.F.: C25H21D4F3N4O6
Mol.Wt.: 538.5
Status: Custom Synthesis
Donepezil-D7 Hydrochloride
CAT No: VS-A186343
CAS No: 1261394-20-0
Mol.F.: C24H23D7ClNO3
Mol.Wt.: 423.0
Status: Custom Synthesis
Cyclosporin A-D4 Acetate
CAT No: VS-A186347
CAS No: NA
Mol.F.: C64H109D4N11O13
Mol.Wt.: 1248.67
Status: Custom Synthesis
Clonidine D4 Hydrochloride
CAT No: VS-A186353
CAS No: 67151-02-4
Mol.F.: C9H5D4Cl2N3 : HCl
Mol.Wt.: 234.1 : 36.5
Status: Custom Synthesis
Chlorzoxazone-4,6,7 D3
CAT No: VS-A186367
CAS No: 1185173-60-7
Mol.F.: C7HD3ClNO2
Mol.Wt.: 172.6
Status: Custom Synthesis
Desipramine-2,4,6,8-d4 Hydrochloride
CAT No: VS-A186378
CAS No: 61361-34-0
Mol.F.: C18H18D4N2 : HCl
Mol.Wt.: 270.4 : 36.5
Status: Custom Synthesis
Deoxycholic Acid-D4
CAT No: VS-A186380
CAS No: 112076-61-6
Mol.F.: C24H36D4O4
Mol.Wt.: 396.6
Status: Custom Synthesis
Ciprofloxacin D8 Hydrochloride
CAT No: VS-A186388
CAS No: 1216659-54-9
Mol.F.: C17H10D8FN3O3 : HCl
Mol.Wt.: 339.4 : 36.5
Status: Custom Synthesis
Chlorpromazine D6 Hydrochloride
CAT No: VS-A186456
CAS No: 1228182-46-4
Mol.F.: C17H13D6ClN2S : HCl
Mol.Wt.: 324.9 : 36.5
Status: Custom Synthesis
Coumarin-D4
CAT No: VS-A186461
CAS No: 185056-83-1
Mol.F.: C9H2D4O2
Mol.Wt.: 150.15
Status: Custom Synthesis
Dehydro Aripiprazole-D8 Hydrochloride
CAT No: VS-A186463
CAS No: 1215383-78-0
Mol.F.: C23H17D8Cl2N3O2 :HCl
Mol.Wt.: 454.4 : 36.5
Status: Custom Synthesis
Clozapine D8
CAT No: VS-A186468
CAS No: 1185053-50-2
Mol.F.: C18H11D8ClN4
Mol.Wt.: 334.9
Status: Custom Synthesis
Dothiepin-D3
CAT No: VS-A186474
CAS No: 136765-31-6
Mol.F.: C19H18D3NS
Mol.Wt.: 298.46
Status: Custom Synthesis
Citalopram D6
CAT No: VS-A186479
CAS No: 1190003-26-9
Mol.F.: C20H15D6FN2O
Mol.Wt.: 330.4
Status: Custom Synthesis
Drotaverine-d10 Hydrochloride
CAT No: VS-A186481
CAS No: NA
Mol.F.: C24H22D10ClNO4
Mol.Wt.: 444.03
Status: Custom Synthesis
Dimethylamine-D6 Hydrochloride
CAT No: VS-A186499
CAS No: 53170-19-7
Mol.F.: C2H2D6ClN
Mol.Wt.: 87.58
Status: Custom Synthesis
Carbofuran-D3
CAT No: VS-A186524
CAS No: 1007459-98-4
Mol.F.: C12H12D3NO3
Mol.Wt.: 224.27
Status: Custom Synthesis
Dazomet-D6
CAT No: VS-A186540
CAS No: NA
Mol.F.: C5H4D6N2OS
Mol.Wt.: 152.24
Status: Custom Synthesis
Chlorotoluron D6
CAT No: VS-A186551
CAS No: 1219803-48-1
Mol.F.: C10H7D6ClN2O
Mol.Wt.: 218.71
Status: Custom Synthesis
Dicamba D3
CAT No: VS-A186552
CAS No: 349553-95-3
Mol.F.: C8H3D3Cl2O3
Mol.Wt.: 224.06
Status: Custom Synthesis
Dicamba methyl ester-d6
CAT No: VS-A186553
CAS No: NA
Mol.F.: C9H2D6Cl2O3
Mol.Wt.: 241.1
Status: Custom Synthesis
Dichlorprop-methyl ester-d3
CAT No: VS-A186555
CAS No: NA
Mol.F.: C10H7D3Cl2O3
Mol.Wt.: 252.11
Status: Custom Synthesis
Chlomethoxyfen-d3
CAT No: VS-A186559
CAS No: NA
Mol.F.: C13H6D3Cl2NO4
Mol.Wt.: 317.14
Status: Custom Synthesis
Cymoxanil-D3
CAT No: VS-A186562
CAS No: 2140803-92-3
Mol.F.: C7H7D3N4O3
Mol.Wt.: 201.2
Status: Custom Synthesis
Dimethyl phthalate-D6
CAT No: VS-A186565
CAS No: 85448-30-2
Mol.F.: C10H4D6O4
Mol.Wt.: 200.22
Status: Custom Synthesis
Desmedipham-D5
CAT No: VS-A186574
CAS No: NA
Mol.F.: C16H16N2O4
Mol.Wt.: 305.34
Status: Custom Synthesis
Dansyl Acid-d6
CAT No: VS-A186583
CAS No: 1329836-02-3
Mol.F.: C12H7D6NO3S
Mol.Wt.: 257.34
Status: Custom Synthesis
Dansyl Chloride-d6
CAT No: VS-A186584
CAS No: 1276379-68-0
Mol.F.: C12H6D6ClNO2S
Mol.Wt.: 275.78
Status: Custom Synthesis
Dibutyl Phthalate D4
CAT No: VS-A186591
CAS No: 93952-11-5
Mol.F.: C16H18D4O4
Mol.Wt.: 282.37
Status: Custom Synthesis
Diethyl Phthalate-d4(ring-d4)
CAT No: VS-A186592
CAS No: 93952-12-6
Mol.F.: C12H10D4O4
Mol.Wt.: 226.26
Status: Custom Synthesis
Dipentyl phthalate-D4
CAT No: VS-A186593
CAS No: 358730-89-9
Mol.F.: C18H22D4O4
Mol.Wt.: 310.42
Status: Custom Synthesis
Clenbuterol-D9
CAT No: VS-A186622
CAS No: 129138-58-5
Mol.F.: C12H9D9Cl2N2O
Mol.Wt.: 286.25
Status: Custom Synthesis
Clenproperol-D6
CAT No: VS-A186623
CAS No: 2022196-71-8
Mol.F.: C11H10D6Cl2N2O
Mol.Wt.: 269.2
Status: Custom Synthesis
Clenproperol-D7
CAT No: VS-A186624
CAS No: 1173021-09-4
Mol.F.: C11H9D7Cl2N2O
Mol.Wt.: 270.21
Status: Custom Synthesis
Clencyclohexerol-D10
CAT No: VS-A186625
CAS No: 1346599-61-8
Mol.F.: C14H10D10Cl2N2O2
Mol.Wt.: 329.29
Status: Custom Synthesis
Clenpenterol-D5 Hydrochloride
CAT No: VS-A186626
CAS No: 1794793-20-6
Mol.F.: C13H16D5Cl3N2O
Mol.Wt.: 332.71
Status: Custom Synthesis
Cimaterol-D6
CAT No: VS-A186627
CAS No: NA
Mol.F.: C12H11D6N3O
Mol.Wt.: 225.32
Status: Custom Synthesis
Cimbuterol-D9
CAT No: VS-A186628
CAS No: 1246819-04-4
Mol.F.: C13H10D9N3O
Mol.Wt.: 242.36
Status: Custom Synthesis
Clorprenaline-D6
CAT No: VS-A186633
CAS No: 1648796-40-0
Mol.F.: C11H10D6ClNO
Mol.Wt.: 219.74
Status: Custom Synthesis
Crystal Violet-D6
CAT No: VS-A186650
CAS No: 1266676-01-0
Mol.F.: C25H24D6ClN3
Mol.Wt.: 414.02
Status: Custom Synthesis
Enrofloxacin-D5
CAT No: VS-A186652
CAS No: 1173021-92-5
Mol.F.: C19H17D5FN3O3
Mol.Wt.: 364.4
Status: Custom Synthesis
Ciprofloxacin D8
CAT No: VS-A186653
CAS No: 1130050-35-9
Mol.F.: C17H10D8FN3O3
Mol.Wt.: 339.4
Status: Custom Synthesis
Cinoxacin-D5
CAT No: VS-A186661
CAS No: 2732985-25-8
Mol.F.: C12H5D5N2O5
Mol.Wt.: 267.25
Status: Custom Synthesis
Difloxacin-D3
CAT No: VS-A186663
CAS No: 1173147-93-7
Mol.F.: C21H16D3F2N3O3
Mol.Wt.: 402.42
Status: Custom Synthesis
Difloxacin-D3 hydrochloirde
CAT No: VS-A186664
CAS No: 1173021-89-0
Mol.F.: C21H17D3ClF2N3O3
Mol.Wt.: 438.87
Status: Custom Synthesis
Danofloxacin-D3
CAT No: VS-A186665
CAS No: 1217683-55-0
Mol.F.: C19H17D3FN3O3
Mol.Wt.: 360.4
Status: Custom Synthesis
Desoxycarbadox-D3
CAT No: VS-A186674
CAS No: 1448350-02-4
Mol.F.: C11H7D3N4O2
Mol.Wt.: 233.25
Status: Custom Synthesis
Dimetridazole-D3
CAT No: VS-A186681
CAS No: 64678-69-9
Mol.F.: C5H4D3N3O2
Mol.Wt.: 144.15
Status: Custom Synthesis
Chloramphenicol D5
CAT No: VS-A186695
CAS No: 202480-68-0
Mol.F.: C11H7D5Cl2N2O5
Mol.Wt.: 328.16
Status: Custom Synthesis
Ent-Thiamphenicol-D3
CAT No: VS-A186700
CAS No: 1217723-41-5
Mol.F.: C12H12D3Cl2NO5S
Mol.Wt.: 359.24
Status: Custom Synthesis
Ent-Florfenicol-D3
CAT No: VS-A186701
CAS No: 1217619-10-7
Mol.F.: C12H11D3Cl2FNO4S
Mol.Wt.: 361.23
Status: Custom Synthesis
Ent-Florfenicol Amine-D3
CAT No: VS-A186702
CAS No: 1217625-88-1
Mol.F.: C10H11D3FNO3S
Mol.Wt.: 250.3
Status: Custom Synthesis
Contact
040-23076623, 040-4852 9278
E-Mail