Ibuprofen EP Impurity L with CAS No: 53949-53-4 is an impurity standard of Ibuprofen. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to relieve pain, reduce inflammation and lower fever.Ibuprofen is available over-the-counter (OTC) and in prescription forms at higher doses. Ibuprofen works by inhibiting enzymes in the body (COX-1 and COX-2) that are involved in the production of prostaglandins which are chemicals that contribute to pain, inflammation and fever. Buy high quality Ibuprofen EP Impurity L from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Ibuprofen EP Impurity L