A new flux system, Li2O-MoO3, has been applied to growing BPO4 single crystals. Transparent BPO4 single crystals with sizes up to 31 x 18 x 16 mm(3) have been successfully grown from the new flux by the top-seeded solution growth method. The viscosity of solution using this new flux decreased significantly compared with that of previously utilized Li4P2O7-Li2O flux. The solubility was measured and favorable concentration for BPO4 crystal growth was in the range of 55-64%. The powder SHG effect of as-grown BPO4 crystal was observed and its intensity was about twice as large as that of KDP. The laser damage threshold of BPO4 crystal at lambda=1.064 nm and tau=8.0 ns is about 10.3 GW/cm(2). (c) 2009 Elsevier B.V. All rights reserved.