Montelukast Sulfone with CAS No: 1266620-74-9 is an impurity standard of Montelukast. Montelukast is a medication primarily used to manage and prevent asthma symptoms and to relieve symptoms of allergic rhinitis.Montelukast is belongs to a class of drugs known as leukotriene receptor antagonists.Montelukast is available in tablet, chewable tablet, and granule forms Buy high quality Montelukast Sulfone from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Montelukast Sulfone