Myriant Expands Senior Management Team with the Appointment of Arne P. Duss, Ph.D., as Senior Vice
President of Strategy and Corporate Development

Quincy, Massachusetts – August 14, 2012 — Myriant Corporation, a global renewable chemicals company, announced today the appointment of Dr. Arne Philipp Duss as Senior Vice President of Strategy and Corporate Development. In this newly created position, Dr. Duss will be responsible for accelerating Myriant's strategic growth initiatives and creating opportunistic development opportunities that further solidify the Company's leadership position in the renewable chemicals market. Dr. Duss will report directly to Stephen J. Gatto, Chairman and Chief Executive Officer.

Dr. Duss has more than 15 years of experience developing diversified growth strategies for multi-billion dollar international businesses in a diverse array of industries, including agriculture, chemical and industrial products. His expertise includes expanding businesses into global markets through acquisitions and joint ventures, devising corporate growth initiatives, and identifying and implementing operational efficiencies, all with a focus on revenue generation and value creation. Most recently, Dr. Duss was the Assistant Vice President of Strategy and Business Development for Cargill, where he developed division and business unit strategies for Cargill's trading, energy, food ingredients, animal nutrition, and animal protein businesses. Dr. Duss also led acquisition and divestiture activities, initiated and executed high-value joint ventures in international markets, as well as identified and developed new product segments with high-growth revenue potential.

"The race to commercialize green chemicals will be determined not only by tenacity, but also by an ability to couple creative thinking with strategic insight and a singular focus on value creation. Arne's unique capabilities and industry expertise will serve us well as we identify and execute various pathways to build our business and create value for our shareholders. Arne is a proven leader and we are excited to welcome him to the Myriant team," said Stephen Gatto.

Previous to his tenure at Cargill, Dr. Duss was an Associate Partner at the Monitor Group, a global professional services firm, where he was primarily responsible for developing and implementing growth strategies for the firm's chemicals and basic materials clients across the globe. Dr. Duss also served as an Associate at London-based, international strategy and consulting firm, the Mitchell Madison Group.

Dr. Duss received his Bachelor's degree with High Honors in Business Administration from Otto-Friedrich University in Germany. He received his Master's of Management with Highest Honors and a Ph.D. in Business Administration, Strategic Planning with the distinction of High Honors from ESCP Europe.

About Myriant Corporation

Myriant utilizes proprietary technology to provide innovative, performance-based renewable chemicals utilizing low-cost sugars. In December 2010, Myriant broke ground on its 30 million pound commercial succinic acid facility in Lake Providence, Louisiana. The company's D(-) lactic acid started production at commercial scale in June 2008 for use in polylactic acid. Myriant has agreements with Uhde GmbH for engineering, Davy Process Technology for the integration of Myriant's succinic acid process with the Davy butanediol process for the production of bio-based butanediol, and PTT Chemical for the commercialization of Myriant's technology in South East Asia. Myriant is headquartered in Quincy, Massachusetts. Details are available at www.myriant.com.

Contact:

Sue Hager SVP, Corporate Communications and Government Affairs
Myriant Corporation
shager@myriant.com
617-657-5222