chemical barrels of dichloromethane solvent for industrial use, scientific research, and label of toxicity, hazardous chemical

toxic chemical label barrel warning symbol solvent industry industrial denger dangerous dichloromethane hazard materail flammable icon health healthy medical safety toxicity container methanol ethanol bottle tank drum gallon factory manufactury healthcare organic gass substance liquid poison environment analysis lab caution chemistry medicine technology science scientific hazardous laboratory sign experiment research blue green color barrels use show use