This impurity is listed in Ph. Eur. monograph for Valaciclovir HCl as impurity P and Bis-valaciclovir in USP monograph (impurity K).Form:Off-white sticky solidMelting Point: N/ASolubility:DMSOStorage and Stability:Store at -80°C under inert atmosphere. Protect from light. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.