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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Indazole, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Indazole 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 Indazole-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.

Indazole Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Methylindazole-3-carboxylic Acid Stable Isotopes CS-T-34095 34252-44-3 Enquire
5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trideuter... Stable Isotopes CS-O-53750 2866168-44-5 Enquire
Granisetron-d3 (N-Methyl-d3 Indazole) Stable Isotopes CS-T-79698 1224925-76-1 In Stock
N,​N-​Diethyl-​1,​3-​dihydro-​α-​methyl-​3-​oxo-​1-​phenyl-2... Stable Isotopes CS-T-100458 Not Available Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"4,5,6,7-Tetrahydro-1H-indazole-3-carboxylic acid" Impurities CS-M-07057 6076-13-7 Enquire
"4,5,6,7-Tetrahydro-2H-indazole" Impurities CS-M-47591 2305-79-5 Enquire
"5,7-Dimethyl-1H-indazole" Impurities CS-M-26036 43067-41-0 Enquire
"5-Methyl-4,5,6,7-tetrahydro-2H-indazole-3-carboxylic acid" Impurities CS-M-07632 842972-14-9 Enquire
"5-tert-Butyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic ac... Impurities CS-M-10486 650603-95-5 Enquire
"Bromomethyl-1-(tetrahydro-pyran-2-yl)-1H-indazole," Impurities CS-CW-00122 368426-64-6 Enquire
(E)-6-Iodo-3-[2-(pyridin-2-yl)ethenyl]-1-(tetrahydro-2H-pyra... Impurities CS-T-93485 886230-77-9 In Stock
1-Acetyl-6-iodo-1H-indazole Impurities CS-O-40131 850363-52-9 Enquire
1-Boc-5-fluoro-3-indazole-carboxylic Acid Impurities CS-T-07558 886368-29-2 Enquire
1H-INDAZOLE, 1,3-DIMETHYL-6-NITRO- Impurities CS-ZE-30424 1354224-47-7 In Stock
1H-Indazole-5-methanamine Hydrochloride Impurities CS-T-29256 943845-78-1 Enquire
1H-Indazole-6-carbonitrile Impurities CS-M-51752 141290-59-7 Enquire
1H-Indazole-6-carboxylic Acid Impurities CS-T-29261 704-91-6 Enquire
1-Methyl-1H-indazole-3-carboxylic Acid Anhydride Impurities CS-T-58293 1363173-34-5 Enquire
1-nitroso-1H-indazole-3-carbonitrile Impurities CS-O-39901 98556-68-4 Enquire
1-nitroso-1H-indazole-3-carboxylic acid Impurities CS-O-39902 Not Available Enquire
2,4,6,7-Tetrahydrospiro[1,3-dioxolane-2,5-indazole] hydrochl... Impurities CS-M-29157 1185012-60-5 Enquire
2-Methyl-6-nitroindazole Impurities CS-DL-00927 6850-22-2 Enquire
3-iodo-6-nitro-1-(tetrahydropyran-2-yl)-1H-indazole Impurities CS-O-31814 886230-74-6 Enquire
5-Bromo-4-chloro-1H-indazole Impurities CS-M-53175 1082041-90-4 Enquire
5-Bromo-6-methoxy-1H-indazole Impurities CS-M-53176 152626-78-3 Enquire
5-Bromo-7-chloro-1H-indazole Impurities CS-M-53174 635712-44-6 Enquire
5-Ethoxy-6-oxazol-2-yl-1H-indazole Impurities CS-DU-00364 1226902-30-2 Enquire
5-Fluoroindazole-3-carboxylic Acid Sodium Salt Impurities CS-T-74598 1391053-91-0 Enquire
6-Bromo-1-methyl-1H-indazole-3-carboxylic acid Impurities CS-M-51750 1021859-29-9 Enquire
6-iodo-3-(2-(pyridin-2-yl)ethyl)-1-(tetrahydro-2H-pyran-2-yl... Impurities CS-O-34212 Not Available Enquire
6-nitro-3-(2-(pyridin-2-yl)vinyl)-1-(tetrahydro-2H-pyran-2-y... Impurities CS-O-31815 886230-75-7 Enquire
7-(Benzyloxy)-1-methyl-1H-indazole-3-carboxylic Acid Impurities CS-T-06091 133841-13-1 Enquire
7-Azaindazole Impurities CS-T-04457 271-73-8 Enquire
7-Methyl-1H-indazole-3-carbonitrile Impurities CS-BF-00428 90322-84-2 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"1,3-Dimethyl-1h-indazole-4-boronic acid" Intermediates CS-AC-06006 1260366-15-1 Enquire
"1,3-Dimethyl-1h-indazole-5-boronic acid" Intermediates CS-AC-05627 1310404-48-8 Enquire
"1,3-Dimethyl-1H-indazole-6-boronic acid" Intermediates CS-AC-06557 1310405-37-8 Enquire
"1,3-dimethyl-6-(tetramethyl-1,3,2-dioxaborolan-2-yl)indazol... Intermediates CS-T-66933 1300582-61-9 Enquire
"1,3-Dimethylindazole-5-boronic acid, pinacol ester" Intermediates CS-AC-06574 1220696-53-6 Enquire
"1,4-Dimethyl-1h-indazole-5-boronic acid" Intermediates CS-AC-06373 1310405-36-7 Enquire
"1,5-Dimethyl-1h-indazole-4-boronic acid" Intermediates CS-AC-06680 1262512-81-1 Enquire
"1,5-Dimethyl-1h-indazole-6-boronic acid" Intermediates CS-AC-05722 1310383-98-2 Enquire
"1,6-Dimethyl-1h-indazole-4-boronic acid" Intermediates CS-AC-06213 1310405-32-3 Enquire
"1,6-Dimethyl-1h-indazole-5-boronic acid" Intermediates CS-AC-06273 1310383-74-4 Enquire
"1,6-Dimethyl-3-iodo-1H-indazole" Intermediates CS-EL-30315 1257535-50-4 Enquire
"1,7-Dimethylindazole-5-boronic acid" Intermediates CS-AC-05258 1310383-75-5 Enquire
"1-chloro-7,8,9,10-tetrahydropyrazino[1,2-b]indazole" Intermediates CS-EL-29500 1602279-99-1 Enquire
"1h-indazole-4-carboxylic acid, 6-fluoro-, methyl ester" Intermediates CS-EM-03140 697739-05-2 Enquire
"1-Methyl-1h-indazole-4-boronic acid, HCl salt" Intermediates CS-AC-05587 1257527-53-9 Enquire
"1-Phenyl-4,5,6,7-tetrahydro-1h-indazole-3-carboxylic acid" Intermediates CS-AC-10832 32275-63-1 Enquire
"2,3-Dimethyl-2h-indazole-4-boronic acid, pinacol ester" Intermediates CS-AC-05821 1310383-43-7 Enquire
"2,6-dimethyl-5-nitro-2H-indazole" Intermediates CS-EL-30567 1092346-56-9 Enquire
"3,5-Dichloro-1H-indazole" Intermediates CS-M-50345 36760-20-0 Enquire
"3-Amino-4,5,6,7-tetrahydro-1H-indazole" Intermediates CS-DV-02109 55440-17-0 Enquire
"3-Oxo-1,3,4,5,6,7-hexahydro-2H-indazole-2-carboximidamide" Intermediates CS-M-31986 210417-14-4 Enquire
"4,5,6,7-tetrahydro-2H-indazole-3-carboxylic acid" Intermediates CS-EL-29699 714255-28-4 Enquire
"4,5-dihydro-2H-benzo[g]indazole-3-carboxylic acid" Intermediates CS-EL-05855 898796-47-9 Enquire
"4,6-difluoro-1-methyl-1H-indazole-5-carbaldehyde" Intermediates CS-EL-05001 1185767-07-0 Enquire
"4-Bromo-1,7-dimethyl-1H-indazole" Intermediates CS-EL-02320 1159511-79-1 Enquire
"4-Bromo-2,5-dimethyl-2H-indazole" Intermediates CS-EL-07767 1159511-86-0 Enquire
"5,6-Diaminoindazole" Intermediates CS-T-16882 7404-68-4 Enquire
"5,6-Dinitroindazole" Intermediates CS-T-20693 59601-91-1 Enquire
"5,7-dibromo-4-nitro-1H-indazole,technical grade" Intermediates CS-EL-15923 1427460-60-3 Enquire
"5-Amino-1H-indazole, N1-BOC protected" Intermediates CS-EL-06007 129488-10-4 Enquire
"5-Bromo-1,3-dimethylindazole" Intermediates CS-AC-06969 552331-30-3 Enquire
"5-Bromo-1,6-dimethyl-1H-indazole" Intermediates CS-EL-05636 1159511-81-5 Enquire
"5-Bromo-1,7-dimethyl-1H-indazole" Intermediates CS-M-53083 1092352-34-5 Enquire
"5-Bromo-2,4-dimethyl-2H-indazole" Intermediates CS-M-53425 1159511-89-3 Enquire
"5-Bromo-2,7-dimethyl-2H-indazole" Intermediates CS-EL-07821 1146637-10-6 Enquire
"5-Carboxyindazole, HCl" Intermediates CS-AC-09718 915139-44-5 Enquire
"6,6-dimethyl-1(2),5,6,7-tetrahydro-4H-indazole-4-one" Intermediates CS-DV-03188 912259-11-1 Enquire
"6-Amino-1H-indazole, N1-BOC protected" Intermediates CS-EL-09314 219503-81-8 Enquire
"6-bromo-1,3-dimethyl-1H-indazole" Intermediates CS-EM-03123 1095539-84-6 Enquire
"6-Bromo-1,5-dimethyl-1H-indazole" Intermediates CS-EL-09519 1159511-83-7 Enquire
"6-Bromo-2,3-dimethyl-2H-indazole" Intermediates CS-AC-07217 1142189-49-8 Enquire
"6-Bromo-2,5-dimethyl-2H-indazole" Intermediates CS-EL-02864 1159511-92-8 Enquire
"6-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H... Intermediates CS-BF-00203 885698-71-5 Enquire
"Indazole-5-boronic acid, HCl" Intermediates CS-AC-06718 1257738-46-7 Enquire
1-(3-fluoro-4-methylphenyl)-4,5,6,7-tetrahydro-1H-indazole-3... Intermediates CS-ED-30053 926195-95-1 Enquire
1-(4-methoxybenzyl)-5-nitro-1H-indazole Intermediates CS-ED-30539 1071550-12-3 Enquire
1-(benzenesulfonyl)-4-bromo-1H-indazole Intermediates CS-EM-02523 1001415-32-2 Enquire
1,5-Dimethyl-1H-indazole-3-carbonitrile Intermediates CS-ED-26905 1015846-71-5 Enquire
1,5-Dimethyl-1H-indazole-3-carboxylic acid Intermediates CS-ED-26947 1033693-06-9 Enquire
1-[(4-fluorophenyl)methyl]-1H-indazole-3-carboxylic acid Intermediates CS-EL-10583 50264-63-6 Enquire
1-[3-chloro-5-(trifluoromethyl)-2-pyridinyl]-5-nitro-1H-inda... Intermediates CS-EL-02283 150149-16-9 Enquire
1-Acetyl-4-bromo-1H-indazole Intermediates CS-DJ-00968 885698-70-4 Enquire
1-Acetyl-4-chloro-1H-indazole Intermediates CS-AC-09824 145439-15-2 Enquire
1-Acetyl-5-nitro-1H-indazole Intermediates CS-AC-09796 13436-55-0 Enquire
1-Acetyl-6-benzyloxy-1H-indazole Intermediates CS-ED-38938 568596-29-2 Enquire
1-Acetyl-6-chloro-1H-indazole Intermediates CS-AC-09766 708-40-7 Enquire
1-Benzyl-1H-indazole-3-carboxylic acid Intermediates CS-AC-08645 41354-03-4 Enquire
1-Benzyl-3-(3-chloropropoxy)indazole Intermediates CS-T-05516 13109-79-0 Enquire
1-Benzyl-3-(chloromethyl)-1h-indazole Intermediates CS-AC-04982 131427-22-0 Enquire
1-Benzyl-3-hydroxy-1H-indazole Sodium Salt Intermediates CS-T-05736 13185-09-6 Enquire
1-Benzyl-3-methoxy-1H-indazole Intermediates CS-T-05779 4454-33-5 Enquire
1-Benzylindazole-3-carbaldehyde Intermediates CS-AC-01497 1186509-61-4 Enquire
1-Boc-3-bromo-5-fluoro-indazole Intermediates CS-T-67841 885271-57-8 Enquire
1-Boc-3-bromo-5-nitro-1h-indazole Intermediates CS-T-67230 473416-22-7 Enquire
1-Boc-3-iodoindazole Intermediates CS-M-14551 290368-00-2 Enquire
1-BOC-Indazole-5-boronic Acid Intermediates CS-T-67319 1167418-12-3 Enquire
1-Ethyl-5-nitroindazole Intermediates CS-AC-09826 5228-51-3 Enquire
1h-Indazole,3-(1,3-dioxolan-2-yl)-6-nitro- Intermediates CS-ED-27265 1082041-31-3 Enquire
1H-indazole-3,6-diol Intermediates CS-ED-26645 1000343-86-1 Enquire
1H-Indazole-3-carboxylic acid Intermediates CS-M-16725 4498-67-3 In Stock
1H-Indazole-3-carboxylic acid methyl ester Intermediates CS-AC-08318 43120-28-1 Enquire
1H-Indazole-4-carbaldehyde Intermediates CS-AC-01712 669050-70-8 Enquire
1H-Indazole-4-carboxylic acid Intermediates CS-M-52823 677306-38-6 Enquire
1H-Indazole-4-carboxylic acid methyl ester Intermediates CS-M-52861 192945-49-6 Enquire
1H-Indazole-5-boronic Acid Pinacol Ester Intermediates CS-DJ-00754 862723-42-0 Enquire
1H-Indazole-7-carbaldehyde Intermediates CS-AC-01667 312746-72-8 In Stock
1H-Indazole-7-carboxylic acid ethyl ester Intermediates CS-M-53553 885278-74-0 Enquire
1-Methyl-1H-indazole Intermediates CS-AC-09797 13436-48-1 Enquire
1-Methyl-1h-indazole-4-boronic acid pinacol ester Intermediates CS-AC-06432 885698-94-2 Enquire
1-Methyl-1H-indazole-4-carboxaldehyde Intermediates CS-M-52766 1053655-56-3 Enquire
1-Methyl-1h-indazole-5-carbonitrile Intermediates CS-AC-09235 189107-45-7 Enquire
1-Methyl-1H-indazole-6-carboxaldehyde Intermediates CS-M-52820 1092351-51-3 Enquire
1-Methyl-1H-indazole-6-carboxylic acid Intermediates CS-ED-31513 1031417-77-2 Enquire
1-Methyl-1H-indazole-6-carboxylic acid methyl ester Intermediates CS-M-52864 1007219-73-9 Enquire
1-Methyl-1H-indazole-6-methanamine Intermediates CS-T-58401 267413-31-0 Enquire
1-Methyl-1h-indazole-7-carbaldehyde Intermediates CS-AC-01774 951030-58-3 Enquire
1-Methyl-1H-indazole-7-carboxylic acid methyl ester Intermediates CS-M-52867 1092351-84-2 Enquire
1-Methyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid Intermediates CS-ED-15838 32286-99-0 Enquire
1-methyl-4,5,6,7-tetrahydro-1H-indazole-6-carboxylic acid Intermediates CS-ED-15990 1490736-66-7 Enquire
1-Methyl-5-nitro-1H-indazole Intermediates CS-M-30262 5228-49-9 Enquire
1-Methyl-6-nitro-1H-indazole Intermediates CS-M-33560 6850-23-3 Enquire
1-Methylindazole-3-carboxylic Acid Intermediates CS-T-34093 50890-83-0 In Stock
1-Methylindazole-5-boronic acid pinacol ester Intermediates CS-M-51742 1235469-00-7 Enquire
1-Methyl-indazole-5-carboxylic acid Intermediates CS-M-51746 1176754-31-6 Enquire
1-Methylindazole-6-boronic acid Intermediates CS-AC-06425 1150114-80-9 Enquire
1-Methylindazole-6-boronic acid pinacol ester Intermediates CS-AC-05127 1256359-09-7 Enquire
1-Methylindazole-7-boronic acid pinacol ester Intermediates CS-AC-06496 1313738-64-5 Enquire
1-N-Ethoxycarbonyl-indazole-5-boronic acid pinacol ester Intermediates CS-T-75317 947191-19-7 Enquire
1-Pentyl-1H-indazole-3-carboxylic Acid Intermediates CS-T-84683 1283576-17-9 Enquire
1-propyl-1H-indazole-6-carboxylic acid Intermediates CS-ED-32909 946932-84-9 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Benzyl-3-(3-diethylaminopropyloxy)-1H-indazole Fine Chemicals CS-M-42724 47448-66-8 Enquire
1H-Indazole-3-carbaldehyde Fine Chemicals CS-MM-60738 5235-10-9 Enquire
3-Bromoindazole Fine Chemicals CS-T-68641 40598-94-5 Enquire
4-Bromo-1H-indazole Fine Chemicals CS-M-33728 186407-74-9 Enquire
5-Bromo-1H-indazole Fine Chemicals CS-M-52809 53857-57-1 Enquire
6-Amino-2,3-dimethyl-2H-indazole Fine Chemicals CS-EL-01205 444731-72-0 In Stock
6-Amino-3-methylindazole Fine Chemicals CS-MM-23179 79173-62-9 Enquire
6-Bromo-1H-indazole Fine Chemicals CS-M-33711 79762-54-2 Enquire
6-Bromo-5-fluoro-1H-indazole Fine Chemicals CS-ED-42029 1286734-85-7 Enquire
6-Iodoindazole Fine Chemicals CS-M-51976 261953-36-0 In Stock
7-Bromo-1H-indazole Fine Chemicals CS-M-33866 53857-58-2 Enquire
7-Methoxy-1H-indazole-3-carboxylic Acid Fine Chemicals CS-T-57712 133841-08-4 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1H-Indazole-6-boronic acid Building Blocks CS-M-53070 885068-10-0 Enquire
1-Methyl-1H-indazole-3-carbonyl Chloride Building Blocks CS-T-94060 106649-02-9 Enquire
1-Methyl-1H-indazole-4-boronic acid Building Blocks CS-M-52699 1001907-60-3 Enquire
1-Methyl-1H-indazole-5-boronic acid Building Blocks CS-M-52708 590418-08-9 Enquire
2-Methylindazole-4-boronic acid Building Blocks CS-DV-01819 1001907-56-7 Enquire
3-Methyl-7-nitro-1H-indazole Building Blocks CS-O-36821 101420-66-0 Enquire
4-Bromo-7-(trifluoromethyl)-1H-indazole Building Blocks CS-EM-03270 1186334-79-1 Enquire
7-Methyl-1H-indazole-5-boronic acid Building Blocks CS-M-53137 1245816-07-2 Enquire
N-Boc-indazole-5-boronic acid pinacol ester Building Blocks CS-DV-03650 864771-44-8 Enquire