Barium carbonate. cas number 513-77-9. suppliers (2) combined chemical services (uk) ltd ... the publisher does not guarantee the accuracy of the information held on the directory but does its best to ensure that all content is as accurately communicated as possible from the information given by all manufacturers and suppliers featured. views ... Barium carbonate, chemical formula baco3, molecular weight 197.35. white powder. insoluble in water, density 4.43 g / cm 3, melting point is 1740 ℃ (8820 kpa-90 barometric pressure). 1450 ℃ decomposition, release of carbon dioxide. Chapter 2, to profile the top manufacturers of barium carbonate powder, with price, sales, revenue and global market share of barium carbonate powder in 2017 and 2018. chapter 3, the barium carbonate powder competitive situation, sales, revenue and global market share of top manufacturers are analyzed emphatically by landscape contrast. Barium carbonate is a white, odourless and heavy salt of barium with the chemical formula baco 3 . it is widely used as flux in ceramics, as an ingredient in specialty glass and fine glassware, in the treatment of salt brines, etc.