Acrylic acid is an important organic synthetic raw material and a synthetic resin monomer, and is a vinyl monomer having a very fast polymerization rate. It is the simplest unsaturated carboxylic acid consisting of a vinyl group and a carboxyl group. Pure acrylic acid is a colorless, clear liquid with a characteristic pungent odor. It is miscible with water, alcohol, ether and chloroform and is prepared from propylene obtained from a refinery.