Loratadine Impurity 1, chemically identified as 4-(2-chlorophenyl)-9-ethyl-6-nitro-1,2,3,4-tetrahydrocarbazole-2-carboxylic acid, is a critical degradation product and synthetic intermediate in the manufacturing of the antihistamine Loratadine. Its molecular formula is C18H17ClN2O3 with CAS number 105837-94-5. This impurity arises primarily from incomplete cyclization or nitration side reactions during the key synthesis steps.
Strictly store in a cool, dry place away from light and moisture to prevent hydrolysis. Handle with appropriate PPE including nitrile gloves and safety goggles due to potential irritant properties. Not intended for direct clinical use; only for analytical and industrial quality assurance purposes within GMP facilities.