Caustic soda CAS : 1310-73-2 HS : 281511 UN : 1823 Danger Class: 8 Appearance: white flakes Packing: 25kg/bag Application: â?¢ Used as raw material of chemicals â?¢ Water treatment â?¢ Used in textile, printing and dyeing industry Item Specification Main content 98% Min NA3CO3 0,8%Max NACL 0,05% Max