Yamasa Corporation

Kentaro Miyoshi

Yusuke Ohba

Fumitaka Kano

[Problem] Provided is a method for easily and stably storing crystals of P,P-bis(5'-uridyl)tetraphosphate for a long term. [Solution] A method for storing packed crystals of P,P-bis(5&#x2032;-uridyl)tetraphosphate or a pharmaceutically acceptable salt thereof, wherein one of the following storage conditions (1) to (3): (1) a storage temperature of 0&#xb0; C. or more and less than 25&#xb0; C.; (2) a storage temperature of 25&#xb0; C. or more and less than 40&#xb0; C. and a crystal pH of 4.5 to 8.0; and (3) a storage temperature of 40&#xb0; C. or more and less than 60&#xb0; C. and a crystal pH of 5.0 to 6.4 is selected and the crystals of P,P-bis(5&#x2032;-uridyl)tetraphosphate or the pharmaceutically acceptable salt thereof are stored under the selected condition.

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Choshi, Japan

Kentaro Miyoshi