Minneapolis, MN November 8, 2011 – BioAmber, a next-generation chemicals company, and Mitsui & Co., a leading global trading company, have partnered to build and operate the previously announced manufacturing facility in Sarnia, Ontario, Canada.

The initial phase of the facility is expected to have production capacity of 17,000 metric tons of biosuccinic acid and commence commercial production in 2013. The partners intend to subsequently expand capacity and produce 35,000 metric tons of succinic acid and 23,000 metric tons of 1,4 butanediol (BDO) on the site. Bioamber and Mitsui also intend to jointly build and operate two additional facilities that, together with Sarnia, will have a total cumulative capacity of 165,000 tons of succinic acid and 123,000 tons of BDO. BioAmber will be the majority shareholder in the plants.