They made the call at a press conference at the Jatiya Press Club in the capital.
BSMOA president Nurul Kabir read out a statement at the press conference.
"A syndicate is importing harmful white sodium sulphate for mixing it with salt. As a result, local millers and cultivators are facing huge losses. More than 50 percent salt mills have been closed due to import harmful white sodium,” he said.
The BSMOA president called upon the authorities of Bangladesh Small and Cottage Industries Corporate (BSCIC) to give true information about salt production and the country's demand.
"BSCIC new chairman told the country's annual salt demand is 4.37 lakh metric tonnes which is not right information. The wrong information can affect the slat market ahead of Eid-Ul-Azha," he also said.