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

Benzenesulfonic Acid Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-((ethyl(nitroso)amino)methyl)benzenesulfonic acid (D4-Ring... Stable Isotopes CS-O-44282 Not Available Enquire
3-((ethyl-D5(nitroso)amino)methyl)benzenesulfonic acid Stable Isotopes CS-O-44281 Not Available Enquire
4-​Methyl-​benzenesulfonic Acid (2E)​-​[(5R)​-​2-​Methyl-​5-... Stable Isotopes CS-T-102644 510753-48-7(Unlabelled) Enquire
4-Chlorobenzenesulfonic Acid-d4 Sodium Salt Stable Isotopes CS-T-102403 2514953-11-6 Enquire
4-Hydroxybenzenesulfonic Acid-13C6 Stable Isotopes CS-T-103123 98-67-9(Unlabelled) Enquire
4-Acetamidobenzenesulfonic Acid-d4 Stable Isotopes CS-T-46924 1388717-85-8 Enquire
4-Acetamidobenzenesulfonic Acid-d4 Pyridine (Major) Stable Isotopes CS-T-64189 1794782-52-7 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Benzenesulfonic Acid Isopropyl Ester Metabolite CS-O-07355 6214-18-2 In Stock
Benzenesulfonic Acid Butyl Ester Metabolite CS-O-07353 80-44-4 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,6-Difluorobenzenesulfonic acid Impurity CS-O-45558 686258-75-3 In Stock
4-(trifluoromethyl)benzenesulfonic acid Impurity CS-O-54958 109787-11-3 Enquire
4-acetamido-3-methylbenzenesulfonic acid, sodium salt Impurity CS-O-45635 102568-34-3 Enquire
Benzenesulfonic Acid Ethyl Ester Impurity CS-O-07354 515-46-8 In Stock
Epinephrine 5- benzenesulfonic acid Impurity CS-O-51550 2469755-95-9 Enquire
Epinephrine 6-benzenesulfonic acid Impurity CS-O-51551 2731964-60-4 Enquire
2-amino-4-chloro-5-sulfamoylbenzenesulfonic acid Impurity CS-O-41337 Not Available Enquire
3-Aminobenzenesulfonic acid Impurity CS-M-42936 121-47-1 Enquire
3-Amino-Benzenesulfonic Acid Ethyl Ester Impurity CS-P-08657 1071394-78-9 Enquire
3-Chlorobenzenesulfonic Acid Impurity CS-ZH-12583 20677-52-5 Enquire
3-nitro-4-(((tetrahydro-2H-pyran-4-yl)methyl)amino)benzenesu... Impurity CS-O-36797 Not Available Enquire
4-(Acetylamino)-2-aminobenzenesulfonic Acid Impurity CS-T-00338 88-64-2 Enquire
4-(Diazonium)benzenesulfonic Acid, Fluoroborate Salt Impurity CS-T-16977 2145-24-6 Enquire
4-Acetamidobenzenesulfonic Acid Impurity CS-T-00142 121-62-0 Enquire
4-acetylamino-3-chloro-5-methyl-benzenesulfonic acid Impurity CS-O-38191 Not Available Enquire
4-amino-2-chloro-5-sulfamoylbenzenesulfonic acid Impurity CS-O-40337 17277-91-7 Enquire
4-Amino-3-chloro-5-methyl-benzenesulfonic acid Impurity CS-O-38192 6387-14-0 Enquire
4-Hydroxybenzenesulfonic acid Impurity CS-DV-02821 98-67-9 Enquire
4-Methylbenzenesulfonic Acid 2-[(4-Hydroxyphenyl)phenylmethy... Impurity CS-T-57538 147169-63-9 Enquire
5-(2-amino-1-hydroxyethyl)-2,3-dihydroxybenzenesulfonic acid Impurity CS-O-36355 Not Available Enquire
Dodecylbenzenesulfonic acid (soft type) (LAS 12) Impurity CS-AZ-00151 27176-87-0 Enquire
N-Acetyl-Sulfanilic Acid Methyl Ester Impurity CS-P-08933 64704-11-6 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Hydroxy-3-mercapto-5-(tert-pentyl)benzenesulfonic acid Intermediate CS-O-57522 ---- Enquire
4-Amino-5-methoxy-2-methylbenzenesulfonic Acid Intermediate CS-T-02878 6471-78-9 In Stock
4-Methylbenzenesulfonhydrazide Intermediate CS-M-57930 1576-35-8 In Stock
Propargyl Bezensulfonate Intermediate CS-O-31855 6165-75-9 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,4,6-Trinitrobenzenesulfonic acid Fine Chemicals CS-DV-01267 2508-19-2 In Stock
3-[(Ethylamino)methyl]benzenesulfonic acid Fine Chemicals CS-O-58654 25938-58-3 Enquire
4-[(2-hydroxy-1-naphthalenyl) azo]-5-methoxy-2-methylbenzene... Fine Chemicals CS-RS-00127 61660-27-3 In Stock
4-methylbenzenesulfonic acid Fine Chemicals CS-BX-01316 104-15-4 Enquire
Benzene Sulphonic Acid Fine Chemicals CS-O-00954 98-11-3 In Stock
2,3-dihydroxy-6-[(1r)-1-hydroxy-2-(methylamino)ethyl]benzene... Fine Chemicals CS-O-38206 Not Available Enquire
2-Hydroxy-4-methylbenzenesulfonic acid Fine Chemicals CS-ZG-30096 22356-80-5 Enquire
3,4-dichlorobenzenesulfonic acid Fine Chemicals CS-ED-01136 939-95-7 Enquire
3,5-Dichloro-4-methylbenzenesulfonic acid Fine Chemicals CS-O-37842 2225-18-5 Enquire
4-(5-(p-tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesu... Fine Chemicals CS-O-40867 921617-76-7 Enquire
4-(Acetylamino)-3-methylbenzenesulfonic acid Fine Chemicals CS-O-36599 76382-58-6 Enquire
4,4'-(Diazoamino)dibenzenesulfonic acid Fine Chemicals CS-ED-01351 17596-06-4 Enquire
4,4'-(Hydrazine-1,2-diyl)dibenzenesulfonic acid Fine Chemicals CS-O-38687 732921-44-7 Enquire
4-[(2-hydroxy-1-naphthalenyl) azo]-5-methoxy-2-methylbenzene... Fine Chemicals CS-O-35822 779270-03-0 Enquire
4-acetamido-3-chloro-5-methylbenzenesulfonic acid Fine Chemicals CS-O-36600 408508-13-4 Enquire
4-Chloro-3-nitrobenzenesulfonic Acid Fine Chemicals CS-T-93330 121-18-6 Enquire
4-Diazobenzenesulfonic acid Fine Chemicals CS-MM-49711 305-80-6 Enquire
4-Tert-butylbenzenesulfonic acid Fine Chemicals CS-BX-00793 1133-17-1 Enquire
Benzenesulfonate Fine Chemicals CS-ED-02303 3198-32-1 Enquire
Benzenesulfonic acid, 4-(acetylamino)-, ethyl ester Fine Chemicals CS-ED-02080 6034-55-5 Enquire
Benzenesulfonic acid, mono-​C10-​13-​alkyl derivs., compds. ... Fine Chemicals CS-O-37917 85480-55-3 Enquire
Linear alkylbenzenesulfonic acid Fine Chemicals CS-O-40147 68584-22-5 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,4-dinitrobenzenesulfonic acid Building Blocks CS-T-102299 89-02-1 Enquire
4-((2-chloro-4-hydroxyphenyl)diazenyl)benzenesulfonic acid Building Blocks CS-T-94537 253801-34-2 Enquire
5-(1,1-Dimethylpropyl)-2-hydroxybenzenesulfonic acid Building Blocks CS-O-57521 752958-44-4 Enquire
Diazobenzenesulfonic acid Building Blocks CS-ED-41468 2154-66-7 Enquire
4-(bromomethyl)benzenesulfonic acid Building Blocks CS-ED-01233 82835-61-8 Enquire
4-Hydroxy-2-methylbenzenesulfonic Acid Building Blocks CS-TB-71327 7134-05-6 Enquire
4-Hydroxybenzenesulfonic Acid Ammonium Salt Building Blocks CS-T-78779 856777-15-6 Enquire