In addition to the surfactants containing the organic compounds shown in the above chemical formula 1, surfactants obtained on mixing one or more of ethers, such as polyoxyethylene alkyl ethers or polyoxyethylene alkylphenyl ethers, esters, such as polyoxyethyelen fatty acid esters, polyoxyethylene polyoxypropylene copolymers, polyoxyethylene alkylamine ethers, or nitrogen-containing compounds, su