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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
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
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


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfamethoxazole API Standards CS-O-11749 723-46-6 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Chloro Sulfamethoxazole Impurities CS-O-59482 151928-90-4 Enquire
4-Nitroso Sulfamethoxazole Impurities CS-T-37303 131549-85-4 Enquire
N4-acetyl 5-methyl hydroxy sulfamethoxazole Impurities CS-O-34024 75144-40-0 Enquire
Sulfamethoxazole EP Impurity A Impurities CS-T-01135 21312-10-7 In Stock
Sulfamethoxazole EP Impurity B Impurities CS-T-01916 135529-16-7 In Stock
Sulfamethoxazole EP Impurity C Impurities CS-T-03011 1072-67-9 In Stock
Sulfamethoxazole EP Impurity F Impurities CS-O-14712 17103-52-5 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfamethoxazole (S2100000) EP Standards CS-EG-01973 723-46-6 In Stock
Sulfamethoxazole (Secondary Standards traceble to EP) EP Standards CS-ER-02917 723-46-6 Enquire
Sulfamethoxazole impurity A (Y0000412) EP Standards CS-EG-02618 21312-10-7 In Stock
Sulfamethoxazole impurity F (Y0000413) EP Standards CS-EG-02619 17103-52-5 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Nitro Sulfamethoxazole Intermediates CS-T-37310 29699-89-6 Enquire
N(1)-Acetylsulfamethoxazole Intermediates CS-ED-37899 18607-98-2 Enquire
N-Hydroxy Sulfamethoxazole Intermediates CS-T-28719 114438-33-4 In Stock
Sulfamethoxazole N4-glucoside (alpha/beta mixture) Intermediates CS-T-61454 119691-75-7 In Stock


Glucuronides

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