The Specialty Chemicals Market Volume Index, a tool created by the American Chemistry Council (ACC), entered the second quarter of 2016 on a soft note, slipping 0.3 percent on a three-month moving average basis in April.   The trend has been choppy and April’s decline was preceded by revised flat activity in March and a 0.1 percent drop in February, said the association. Weakness in oilfield chemicals and mining chemicals, among other segments, weighed on overall volumes. Of the twenty-eight s...