label of flammable liquid, hazardous chemical warning on the chemical barrel show caution for use, dimethylbutane, methanol

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