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

Sulfamethoxazole Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Acetyl Sulfamethoxazole-13C6 Stable Isotopes CS-T-100930 Not Available Enquire
N-Acetyl Sulfamethoxazole-d4 (major) Stable Isotopes CS-T-64289 1215530-54-3 In Stock
Sulfamethoxazole-13C6 Stable Isotopes CS-O-00762 1196157-90-0 In Stock
Sulfamethoxazole-d4 Stable Isotopes CS-K-00143 1020719-86-1 In Stock
Sulfamethoxazole-d4 N4-glucoside Stable Isotopes CS-T-99100 Not Available Enquire
4-Nitrososulfamethoxazole 13C6 Stable Isotopes CS-EK-00899 131549-85-4 unlabeled Enquire
N-(4-Aminobenzenesulfonyl) Sulfamethoxazole-d4 Stable Isotopes CS-T-64620 1346603-52-8 Enquire
Sulfamethoxazole-d4 β-D-Glucuronide Stable Isotopes CS-T-95189 Not Available Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfamethoxazole API CS-O-11749 723-46-6 In Stock
Sulfodoxine Impurity A API CS-T-86769 63-74-1 In Stock


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Chloro Sulfamethoxazole Impurity CS-O-59482 151928-90-4 Enquire
4-Amino-N-(5-methyl-4-oxazolyl)benzenesulfonamide Impurity CS-O-47024 1258421-06-5 Enquire
Sulfamethoxazole EP Impurity A Impurity CS-T-01135 21312-10-7 In Stock
Sulfamethoxazole EP Impurity B Impurity CS-T-01916 135529-16-7 In Stock
Sulfamethoxazole EP Impurity C Impurity CS-T-03011 1072-67-9 In Stock
Sulfamethoxazole EP Impurity F Impurity CS-O-14712 17103-52-5 In Stock
Sulfamethoxazole Impurity 2 Impurity CS-EO-03021 51821-47-7 Enquire
N4-acetyl 5-methyl hydroxy sulfamethoxazole Impurity CS-O-34024 75144-40-0 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Hydroxy Sulfamethoxazole Intermediate CS-T-28719 114438-33-4 In Stock
Sulfamethoxazole N4-glucoside (alpha/beta mixture) Intermediate CS-T-61454 119691-75-7 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfamethoxazole β-D-Glucuronide Glucuronide CS-T-87332 14365-52-7 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Nitroso Sulfamethoxazole Nitrosamine CS-T-37303 131549-85-4 Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfamethoxazole Secondary Standards CS-SS-24025-1GM 723-46-6 Enquire
Sulfamethoxazole Secondary Standards CS-SS-24025 723-46-6 Enquire
Sulfamethoxazole Secondary Standards CS-SS-24025-250MG 723-46-6 Enquire
Sulfamethoxazole Impurity A Secondary Standards CS-SS-25392-30MG 21312-10-7 Enquire
Sulfamethoxazole Related Compound B Secondary Standards CS-SS-26210-40MG 135529-16-7 Enquire
Sulfamethoxazole Related Compound C Secondary Standards CS-SS-25391-100MG 1072-67-9 Enquire