AminopterinFolic acid antagonist. Potent dihydrofolate reductase inhibitor.Product SpecificationAlternative Name: 4-Aminofolic acid, 4-Aminopteroylglutamic acid, 4-Amino-PGA Formula: C19H20N8O5 MW: 440.4 CAS: 54-62-6 MI: 14: 472 Purity: ≥98% (HPLC) Appearance: Yellow solid. Solubility: Soluble in dilute aqueous base or DMSO; slightly soluble in water or ethanol. Long Term Storage: Ambient Handling: Protect from light.