Description

• General description: Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.Methotrexate is an antagonist of folic acid that inhibits dihydrofolate reductase (DHFR) enzyme, reversibly and results in impaired DNA synthesis and cellular replication.[1] Methotrexate has been used in treatment of rheumatoid arthritis[2] and also for maintenance therapy in childhood acute lymphocytic leukemia (ALL).[3]
• Application: Methotrexate may be used as a pharmaceutical secondary reference standard for the determination of the analyte in plasma samples[4] and pharmaceutical formulations[5] by various techniques.
• Analysis Note: These secondary standards offer multi-traceability to the USP, EP (PhEur) and BP primary standards, where they are available.
• Other Notes: This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.
• Footnote: To see an example of a Certificate of Analysis for this material enter LRAB9958 in the slot below. This is an example certificate only and may not be the lot that you receive.
• Recommended products: Find a digital Reference Material for this product available on our online platform ChemisTwin® for NMR. You can use this digital equivalent on ChemisTwin® for your sample identity confirmation and compound quantification (with digital external standard). An NMR spectrum of this substance can be viewed and an online comparison against your sample can be performed with a few mouseclicks. Learn more here and start your free trial.