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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Carbazole, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Carbazole impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Carbazole-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Carbazole Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"rac-6-Cyano-3-N-methylamino-1,2,3,4-tetrahydrocarbazole-d3" Stable Isotopes CS-T-91939 1794979-58-0 Enquire
2-(phenyl-2,3,4,5,6-d5)-9H-Carbazole Stable Isotopes CS-O-42172 2375066-12-7 Enquire
3-​(phenyl-​2,​3,​4,​5,​6-​d5)​-9H-​Carbazole Stable Isotopes CS-O-42170 1628788-85-1 Enquire
3-Benzyloxy-4-oxiranylmethyl-d5-9H-carbazole N-Carboxylic Ac... Stable Isotopes CS-T-100782 Not Available Enquire
3-Bromocarbazole-d7 Stable Isotopes CS-O-54382 2764814-81-3 Enquire
4-(2,3-Epoxypropoxy-d5)carbazole Stable Isotopes CS-T-100353 51997-51-4 (Unlabelled) Enquire
4,4'-[9H-Carbazole-3,6-diyldi-(1E)-2,1-ethenediyl]bis[1-meth... Stable Isotopes CS-T-100686 647859-37-8(unlabeled) Enquire
5-([1,1'-biphenyl]-3-yl-d9)-5,8-dihydroindolo[2,3-c]carbazol... Stable Isotopes CS-O-53715 Not Available Enquire
9-(3-bromophenyl-2,4,5,6-d4)-9H-3,9'-bicarbazole-1,1',2,2',3... Stable Isotopes CS-O-60196 3060999-45-0 Enquire
9-(4-(3H-carbazol-9(4H)-yl)phenyl)-9H-carbazole - D20 Stable Isotopes CS-O-51609 Not Available Enquire
9-[4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl]-N3,N3,N6,N6-te... Stable Isotopes CS-O-51606 1613074-59-1(Unlabelled) Enquire
9-Methyl-3-(oxiran-2-ylmethoxy)-9H-carbazole-d3 Stable Isotopes CS-T-80426 1346602-04-7 Enquire
Carbazole D8 Stable Isotopes CS-T-93880 38537-24-5 In Stock
Carbazole-d7 Stable Isotopes CS-O-45901 86-74-8 (Unlabelled) In Stock
N-Phenylcarbazole-d13 Stable Isotopes CS-O-53544 2847910-31-8 In Stock


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
9-[4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl]-N3,N3,N6,N6-te... API Standards CS-O-51603 1613074-59-1 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxy Carbazole Metabolites CS-O-31211 52602-39-8 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"1,4-Dimethyl-9H-carbazole-3-carbaldehyde" Impurities CS-M-47129 14501-66-7 Enquire
"3-Methyl-2,3,4,9-tetrahydro-1H-carbazole" Impurities CS-M-47494 6933-54-6 Enquire
"5,11-Dihydro-2,10-dihydroxyindolo[3,2-b]carbazole-6-carboxa... Impurities CS-T-53038 549548-28-9 Enquire
"5,11-Dihydro-2,8-dihydroxyindolo[3,2-b]carbazole-6-carboxal... Impurities CS-T-53037 549548-29-0 Enquire
"5,11-Dihydro-2-hydroxyindolo[3,2-b]carbazole-6-carboxaldehy... Impurities CS-T-53100 549548-26-7 Enquire
"5,11-Dihydro-8-hydroxyindolo[3,2-b]carbazole-6-carboxaldehy... Impurities CS-T-53101 549548-25-6 Enquire
"5,12-dihydro-5-phenyl-Indolo[3,2-a]carbazole" Impurities CS-DV-02965 1247053-55-9 Enquire
"9-bromo-8-methoxy-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo... Impurities CS-DV-03423 1256579-03-9 Enquire
(R)-(-)-4-(2,3-Epoxypropoxy)carbazole Impurities CS-T-54117 95093-96-2 Enquire
(S)-(+)-4-(2,3-Epoxypropoxy)carbazole Impurities CS-T-21824 95093-95-1 Enquire
2-Acetylcarbazole Impurities CS-T-00356 23592-74-7 Enquire
4-Hydroxy-9-methyl Carbazole Impurities CS-O-56555 247096-42-0 Enquire
5,11-Dihydro-4,8-dihydroxyindolo[3,2-b]carbazole-6-carboxald... Impurities CS-T-53039 549548-27-8 Enquire
6-Carboxamido-3-phthalimido-1,2,3,4-tetrahydrocarbazole Impurities CS-O-43269 147009-23-2 Enquire
6-Chloro-β,-β-dimethoxy-α-methyl-9H-carbazole... Impurities CS-T-50643 114041-35-9 Enquire
7H-Dibenzo[c,g]carbazole Impurities CS-T-52445 194-59-2 Enquire
9,9'-[[1,1'-Biphenyl]-4,4'-diyl]bis[3-ethenyl-9H-carbazole] Impurities CS-O-37291 908147-48-8 Enquire
9-Ethyl-6,11-dihydro-8-hydroxy-6,6-dimethyl-11-oxo-5H-benzo[... Impurities CS-T-76222 1256584-52-7 Enquire
9-Ethyl-6,6-dimethyl-8-(4-morpholinopiperidin-1-yl)-11-oxo-6... Impurities CS-O-35982 Not Available Enquire
9H-Carbazole 3-Oxoacetic Acid Impurities CS-T-71014 1094264-08-0 Enquire
9H-Carbazole,9-[1,1-biphenyl]-4-yl-3-(4,4,5,5-tetramethyl-1,... Impurities CS-DV-03425 1391729-66-0 Enquire
9-Methyl-9H-carbazole-3-carbaldehyde Impurities CS-M-17813 21240-56-2 Enquire
9-Methyl-9H-carbazole-3-carboxylic acid Impurities CS-M-07337 89374-79-8 Enquire
Carbazole Impurities CS-O-07543 86-74-8 In Stock
Nitroso-4 -Hydroxy Carbazole Impurities CS-O-45005 Not Available Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(R,S)-3-Boc-amino-9-boc-1,2,3,4-tetrahydro-carbazole-3-carb... Intermediates CS-T-68005 1031927-09-9 Enquire
"1,2,3,4-Tetrahydro-7-methoxycarbazole" Intermediates CS-T-43758 3382-43-2 Enquire
"2,3,4,9-tetrahydro-1H-carbazole" Intermediates CS-Q-01674 942-01-8 Enquire
"2,3,4,9-Tetrahydro-1H-carbazole-8-carboxylic acid" Intermediates CS-M-46341 65764-56-9 Enquire
"2,7-Dibromo-9H-carbazole" Intermediates CS-T-89110 136630-39-2 Enquire
"3,4-Cyclopentenopyrido[3,2-a]carbazole" Intermediates CS-T-51467 69477-66-3 Enquire
"3,6-dibromo-9-butyl-9H-carbazole" Intermediates CS-EL-04139 121602-03-7 Enquire
"3,6-Dibromo-9H-carbazole" Intermediates CS-M-58368 6825-20-3 Enquire
"3,6-Dibromo-9-Phenylcarbazole" Intermediates CS-CS-00034 57103-20-5 Enquire
"3,6-Diphenyl-9H-carbazole" Intermediates CS-DV-02065 56525-79-2 Enquire
"3R-6-Cyano-3-N-methylamino-1,2,3,4-tetrahydrocarbazole" Intermediates CS-T-13662 247939-84-0 Enquire
"4,9-Dihydro-1,4-dioxo-1H-carbazole-8-acetic Acid" Intermediates CS-T-91155 1293288-25-1 Enquire
"4-[1'-(3'-Azido-1',2'-propanediol)]carbazole" Intermediates CS-T-04623 1253696-17-1 Enquire
"5-(Oxiranylmethoxy)-2,3,4,9-tetrahydrocarbazole" Intermediates CS-T-59992 58457-32-2 Enquire
"5,6,8,9-Tetrahydro-7H-dibenzo[c,g]carbazole" Intermediates CS-T-61810 117766-87-7 Enquire
"5-Bromo-1,2,3,4-tetrahydrocarbazole" Intermediates CS-T-08981 78863-98-6 Enquire
"5-Hydroxy-2,3,4,9-tetrahydrocarbazole" Intermediates CS-T-28785 35618-96-3 Enquire
"6-Bromo-2,3,4,9-tetrahydro-1H-carbazole" Intermediates CS-M-25532 21865-50-9 Enquire
"6-Chloro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxylic acid" Intermediates CS-M-05758 50639-66-2 Enquire
"6-Fluoro-2,3,4,9-tetrahydro-1H-carbazole" Intermediates CS-M-25534 2367-17-1 Enquire
"6-fluoro-2,3,4,9-tetrahydro-1H-carbazole-1-carboxamide" Intermediates CS-EL-10825 1092346-28-5 Enquire
"9-{[1,1-biphenyl]-4-yl}-9H,9H-3,3-bicarbazole" Intermediates CS-DV-03418 1346669-48-4 Enquire
"9-benzyl-1,4-dimethyl-9H-carbazole" Intermediates CS-EL-30962 120090-53-1 Enquire
"9-Benzyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)car... Intermediates CS-AC-05893 1357387-29-1 Enquire
"9-Ethyl-8-oxo-6,7,8,9-tetrahydro-5H-carbazole-3-carboxylic ... Intermediates CS-M-05667 354993-58-1 Enquire
"9-Methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)car... Intermediates CS-AC-06301 1217891-71-8 Enquire
[3-(carbazole-9H)Phenyl]Pinacol ester Intermediates CS-O-43915 870119-58-7 Enquire
1,2,3,4-Tetrahydro-5-methoxycarbazole Intermediates CS-T-43759 68962-14-1 Enquire
1,2,3,9-Tetrahydro-9[H]-Carbazole-4-One Intermediates CS-O-31408 15128-52-6 Enquire
1,3,6,8-Tetrabromocarbazole Intermediates CS-T-86854 55119-09-0 Enquire
1,9′-Bicarbazole Intermediates CS-O-50004 27825-35-0 Enquire
10,15-Dihydro-5H-diindolo[3,2-a:3',2'-c]carbazole Intermediates CS-ED-26567 109005-10-9 Enquire
10-Bromo-7H-benzo[c]carbazole Intermediates CS-T-49625 1698-16-4 Enquire
11-Phenyl-11,12-dihydroindolo[2,3-a]carbazole Intermediates CS-ED-33260 1024598-06-8 Enquire
12,12-dimethyl-11,12-dihydroindeno[2,1-a]carbazole Intermediates CS-BX-02640 1329054-41-2 Enquire
1-bromo-9H-carbazole Intermediates CS-DV-00868 16807-11-7 Enquire
2-(1-Hydroxyethyl)-6-chlorocarbazole Intermediates CS-ED-00319 92841-21-9 Enquire
2,3,4,9-tetrahydro-1H-carbazole-6-carbonitrile Intermediates CS-ED-18277 100723-77-1 Enquire
2,7-dibromo-9-(heptadecan-9-yl)-9H-carbazole Intermediates CS-ED-26128 955964-73-5 Enquire
2-Bromo-9H-carbazole Intermediates CS-AC-04615 3652-90-2 Enquire
2-Bromo-9-phenylcarbazole Intermediates CS-DJ-00452 94994-62-4 Enquire
2-bromo-Indolo[3,2,1-jk]carbazole Intermediates CS-DV-01580 1174032-81-5 Enquire
3-(4-Bromophenyl)-9-phenyl-9H-carbazole Intermediates CS-H-00304 1028647-93-9 Enquire
3,6-dibromo-9-{4-[(2-ethylhexyl)oxy]phenyl}-9H-carbazole Intermediates CS-ED-26267 946491-48-1 Enquire
3,6-Dibromo-α-[[(2-chlorophenyl)amino]methyl]-9H-carbazole-9... Intermediates CS-T-88721 327026-16-4 Enquire
3,6-Dibromo-α-[[(4-bromophenyl)amino]methyl]-9H-carbazole-9-... Intermediates CS-T-88758 328076-93-3 Enquire
3,6-Diethynylcarbazole Intermediates CS-ED-26391 909342-65-0 Enquire
3,6-Difluorocarbazole Intermediates CS-O-49465 1041143-98-9 Enquire
3-Amino-9-ethylcarbazole Intermediates CS-CE-00635 132-32-1 Enquire
3-Bromo-9-ethyl-9H-carbazole Intermediates CS-H-00485 57102-97-3 Enquire
3-Bromo-9H-carbazole Intermediates CS-AC-03407 1592-95-6 Enquire
3-Bromo-9-naphthalen-1-yl-9H-carbazole Intermediates CS-H-00411 934545-83-2 Enquire
3-Bromo-N-phenylcarbazole Intermediates CS-AC-04625 1153-85-1 Enquire
3-Chloro-9H-carbazole Intermediates CS-O-33491 2732-25-4 Enquire
3-methyl-2,3,4,9-tetrahydro-1H-carbazole-8-carboxylic acid Intermediates CS-ED-15936 185556-32-5 Enquire
3-Nitrocarbazole Intermediates CS-T-59370 3077-85-8 Enquire
3-phenyl-9H-carbazole Intermediates CS-ED-33418 103012-26-6 Enquire
3S-6-Cyano-3-N-methylamino-1,2,3,4-tetrahydrocarbazole Intermediates CS-T-13664 1217755-82-2 Enquire
3-tert-Butyl-2,3,4,9-tetrahydro-1H-carbazole-6-carboxylic ac... Intermediates CS-M-20052 685862-13-9 Enquire
4-Bromo-9H-carbazole Intermediates CS-H-00486 3652-89-9 Enquire
4-hydroxy Carbazole Intermediates CS-M-34850 54989-33-2 In Stock
6-(9H-carbazol-9-yl)-9H-3,9-bicarbazole Intermediates CS-DV-03179 606129-90-2 Enquire
6-(Morpholin-4-ylcarbonyl)-2,3,4,9-tetrahydro-1H-carbazole Intermediates CS-ED-31123 931666-01-2 Enquire
6,7,8,9-Tetrahydro-5H-carbazole-2-carboxylic acid Intermediates CS-M-10205 729613-71-2 Enquire
6,7,8,9-Tetrahydro-5H-carbazole-3-carboxylic acid Intermediates CS-M-04380 36729-27-8 Enquire
6-amino-6,7,8,9-tetrahydro-5H-carbazole-3-carboxamide Intermediates CS-ED-40649 147009-17-4 Enquire
6-Chloro-2-ethyl-9H-carbazole Intermediates CS-ED-00321 92841-23-1 Enquire
6-Fluoro-2,3,4,9-tetrahydro-1H-carbazole-3-carboxylic acid Intermediates CS-ED-30044 907211-31-8 Enquire
6-Methyl-6,7,8,9-tetrahydro-5H-carbazole-3-carboxylic acid Intermediates CS-ED-15937 446829-41-0 Enquire
7H-Benzo(c)carbazole Intermediates CS-O-43918 205-25-4 Enquire
8-Chlorocarbazole-1-acetic Acid Intermediates CS-T-72296 131023-44-4 Enquire
9-([1,1-biphenyl]-3-yl)-3-broMo-9H-carbazole Intermediates CS-DV-03400 1428551-28-3 Enquire
9-([1,1'-Biphenyl]-4-yl)-3-(4-bromophenyl)-9H-carbazole Intermediates CS-ED-21290 1028648-25-0 Enquire
9-(1-Naphthyl)carbazole Intermediates CS-O-41880 22034-43-1 Enquire
9-(2-Bromophenyl)-9H-carbazole Intermediates CS-DV-03401 902518-11-0 In Stock
9-(2-Fluoro-4-nitrophenyl)carbazole Intermediates CS-T-76275 1820707-91-2 Enquire
9-(2-Nitrophenyl)carbazole Intermediates CS-AC-10276 6286-72-2 Enquire
9-(3-Bromophenyl)-9h-carbazole Intermediates CS-DV-03402 185112-61-2 Enquire
9-(4-Bromo-4-biphenylyl)-9H-carbazole Intermediates CS-DV-03403 212385-73-4 Enquire
9-(4-bromobutyl)-9H-carbazole Intermediates CS-ED-21691 10420-20-9 Enquire
9-(4-Bromophenyl)-9H-carbazole Intermediates CS-T-68759 57102-42-8 Enquire
9-(6-bromohexyl)-9H-carbazole Intermediates CS-ED-21835 94847-10-6 Enquire
9-(Oxiran-2-ylmethyl)-9H-carbazole Intermediates CS-M-46241 52131-82-5 Enquire
9,9'-(5-bromo-1,3-phenylene)bis(9H-carbazole) Intermediates CS-O-43921 750573-24-1 Enquire
9,9'-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,3-ph... Intermediates CS-O-43956 1082549-89-0 Enquire
9-Acetyl-3,6-diiodocarbazole Intermediates CS-ED-36531 606129-89-9 Enquire
9-Acetyl-6-chloro-2-(2-chloro-1-oxopropyl)-9H-carbazole Intermediates CS-T-47177 114041-34-8 Enquire
9-Benzoyl-3,6-dibromo-9H-carbazole Intermediates CS-ED-17048 912850-81-8 Enquire
9-benzyl-3-bromo-9H-carbazole Intermediates CS-EL-02202 339576-55-5 Enquire
9-Biphenyl-4-yl-3-(4-chlorophenyl)-6-phenyl-9H-carbazole Intermediates CS-H-00351 1221238-04-5 Enquire
9-Biphenyl-4-yl-3-(4-chlorophenyl)-9H-carbazole Intermediates CS-H-00305 1219821-48-3 Enquire
9-Ethyl-3-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-9H-... Intermediates CS-ED-19225 1020657-86-6 Enquire
9-Ethyl-3-isothiocyanato-9H-carbazole Intermediates CS-ED-28829 95756-56-2 Enquire
9-ethyl-9H-carbazole-3-carboxylic acid Intermediates CS-Q-00016 57102-98-4 Enquire
9-Ethyl-carbazole-3-carbaldehyde Intermediates CS-H-00162 7570-45-8 Enquire
9-Fluoro-11H-benzo[a]carbazole Intermediates CS-ED-29937 1041143-65-0 Enquire
9-Methanesulfonylcarbazole Intermediates CS-AC-11645 2169-37-1 Enquire
9-Methyl-9H-carbazole-2-carbaldehyde Intermediates CS-M-07176 108793-90-4 Enquire
9-methyl-9H-carbazole-3-sulfonyl chloride Intermediates CS-ED-20632 905978-77-0 Enquire
9-Phenyl-9h-carbazole-3-boronic acid pinacol ester Intermediates CS-AC-06094 1126522-69-7 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-chloro-9H-carbazole Fine Chemicals CS-DV-01654 10537-08-3 Enquire
3-(tert-Butyl)-9H-carbazole Fine Chemicals CS-BL-00150 22401-74-7 Enquire
3,6-Di-tert-butyl-9H-carbazole Fine Chemicals CS-DV-02066 37500-95-1 Enquire
3-Bromo-9-naphthalen-2-yl-9H-carbazole Fine Chemicals CS-H-00412 934545-80-9 Enquire
3-Bromo-9-p-tolyl-9H-carbazole Fine Chemicals CS-H-00388 731016-44-7 Enquire
3-Chloro-6,7,8,9-tetrahydro-5H-carbazole-4-carboxylic acid Fine Chemicals CS-MM-41610 876885-94-8 Enquire
9-Biphenyl-4-yl-3-bromo-9H-carbazole Fine Chemicals CS-H-00413 894791-46-9 Enquire
N-Phenylcarbazole Fine Chemicals CS-O-38771 1150-62-5 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
9-(2-Fluorophenyl)-9H-carbazole Building Blocks CS-O-48786 1801146-47-3 Enquire
9H-4,9'-Bicarbazole Building Blocks CS-O-48745 1226810-17-8 Enquire