Also available in and bulk. Please contact Fisher for quotes. Cytidine-5'-triphosphate disodium (CTP) is a pyrimidine nucleoside triphosphate that is involved in a variety of biochemical reactions. Cytidine-5'-triphosphate disodium is used in the synthesis of RNA by RNA polymerases. In the formation of phosphatidylcholine (PC), Cytidine-5'-triphosphate disodium reacts with phosphocholine, via CTP,phosphocholine cytidylyltransferases, to produce CDP-choline and diphosphate. purity: 97%