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

Topotecan Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Desethyl-4-deshydroxy-4-oxo-topotecan-d6 Stable Isotopes CS-T-100514 Not Available Enquire
5-Hydroxy Topotecan-d6 Stable Isotopes CS-T-97407 504413-73-4 Enquire
N-desmethyl N-Nitroso Topotecan-D3 Stable Isotopes CS-O-45827 Not Available Enquire
N-Desmethyl Topotecan-d3 (>90%) Stable Isotopes CS-T-97615 1217633-79-8 Enquire
Topotecan-d6 Stable Isotopes CS-T-101000 1044904-10-0 Enquire
Topotecan-d6 Carboxylic acid Sodium Stable Isotopes CS-T-62147 1263362-92-0 Enquire
Topotecan-d6 Hydrochloride Stable Isotopes CS-T-87161 1044746-98-6 Enquire
Topotecan-d5 Stable Isotopes CS-T-87157 1133355-98-2 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Topotecan API CS-O-02414 123948-87-8 In Stock
Topotecan Hydrochloride API CS-O-08329 119413-54-6 In Stock
Topotecan Related Compound C API CS-O-07471 7689-03-4 In Stock
Topotecan hydrochloride hydrate API CS-EK-02473 123948-87-8 free base Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Desmethyl Topotecan Impurity CS-O-08330 190710-79-3 In Stock
Topotecan Carboxylic Acid Sodium Impurity CS-O-08328 123949-08-6 Enquire
8-Methoxy Topotecan Impurity CS-O-08331 Not Available Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-desmethyl N-Nitroso Topotecan Nitrosamine CS-O-45826 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Topotecan Related Compound C Secondary Standards CS-SS-26027-50MG 7689-03-04 Enquire