BBC News Online was typical of many publications when it described tartrazine as “a dye made from coal tar”. A quick venture across the Internet will tell you that coal tar is described as the ...

while in the others it is made to enter in a liquid state." JOHN BETHELL's PROCESS. Patented in England in 1849. He applies the " creosote," or coal tar, in its liquid state, without any previous ...

"There's a reason coal tar has been made all these years: It works better and asphalt emulsion has some deficiencies." Chris Mariani, vice president of marketing for GemSeal, says the company ...

Grace Calvert, an eminent English chemist, made the extraordinary statement ... have been prepared from the alkalies of coal tar by Messr3. W. Perkins and A. H. Church, two rising discoverers ...