Ketorolac EP Impurity B with CAS No: 113502-52-6 is an impurity standard of Ketorolac. Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve moderate to severe pain. Ketorolac is available in oral and injectable forms and is often used for short-term pain relief after surgery or injury. Ketorolac works by inhibiting enzymes involved in the production of pain-causing chemicals called prostaglandins. Buy high quality Ketorolac EP Impurity B from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Ketorolac EP Impurity B