BRUNO BOCK Chemische Fabrik GmbH & Co. KG is a privately owned enterprise, founded in 1937 in Hamburg as trading company later specializing in manufacturing of ORGANIC SULFUR CHEMICALS.BRUNO BOCK is a leading producer of Thioglycolic Acid (CAS# 68-11-1). Production started 1950. In 1968 the company outgrew the available facilities in Hamburg and moved to Marschacht on the southern bank of the river Elbe 30 km east of Hamburg. Since the early 1990s besides Thioglycolic Acid and its derivatives the production of 3-Mercaptopropionic Acid (CAS# 107-96-0), Thiolactic Acid (CAS# 79-42-5) and their derivatives like Polythiols and