3-Amino-1-phenyl-2-pyrazolin-5-one

• CAT Number: R065620
• CAS Number: 4149-06-8
• Molecular Formula: C9H9N3O
• Molecular Weight: 175.191
• Purity: ≥95%
• Storage: -20°C
• IUPAC Name: 5-amino-2-phenyl-4H-pyrazol-3-one
• InChI: InChI=1S/C9H9N3O/c10-8-6-9(13)12(11-8)7-4-2-1-3-5-7/h1-5H,6H2,(H2,10,11)
• InChIKey: LPOVZHYARSAVIZ-UHFFFAOYSA-N
• SMILES: C1C(=NN(C1=O)C2=CC=CC=C2)N

3-Amino-1-phenyl-2-pyrazolin-5-one, also known as Aminophenazone, is a synthetic compound used as an analgesic and antipyretic medication. It belongs to the pyrazolone class of drugs and works by inhibiting prostaglandin synthesis, which reduces pain and fever. Aminophenazone has been used historically in over-the-counter pain relief medications but is now less commonly used due to safety concerns. Despite its efficacy, it has been associated with rare but serious adverse effects, including agranulocytosis. Ongoing research focuses on safer alternatives for pain management with similar mechanisms of action.