Impurity reference standards
Closantel impurities & reference standards
Characterised Closantel impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
11reference materials
1isotope-labelled
COAHPLC · NMR · MS on request
FAQs — Closantel impurities
Which Closantel impurities do you supply?
We list 11 Closantel-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Closantel impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Closantel impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Closantel impurity standards
We reply within one business day with price, pack options, lead time and documentation.