SAFC Hitech Well Positioned for High-Brightness LED Manufacturing Boom With TMG Expansion at Bromborough UK Plant SAFC Hitech®, a business segment within SAFC®, a division of the Sigma-Aldrich® Group, today announced it plans to invest $2m (approximately 1.2m pounds Sterling) in expanding production of trimethylgallium (TMG) at its Bromborough, Wirral, UK manufacturing plant.