Isopropanol → n-(2-Hydroxyethyl)ammonium methyl sulfate

Triethanol amine (149 g) and 547 g of hydrogenated tallow fatty acid were used and subjected to an esterification reaction at 200° C. under nitrogen atmosphere for 10 hours, and to this was added 139 g of isopropanol, and this was subjected to a quaternizing reaction at 60° C. by using 126 g of dimethyl sulfate to obtain a propanol solution of N-methyl-N,N-bis (hydrogenated tallow alkanoyl oxyethyl)-N-(2-hydroxyethyl)ammonium methyl sulfate. It was found through NMR measurements that this solution had a long-chain alkyl quaternary ammonium salt content of 12%, a di-long-chain alkyl quaternary ammonium salt content of 35% and mono-long-chain alkyl quaternary ammonium salt content of 15%. The resulting isopropanol solution was taken in a manner so as to set the total amount of quaternary ammonium salt to 5 g, and this was mixed with 2 g of ethyleneoxide 12 mole adduct (HLB=14.0) of hydrogenated tallow fatty acid methyl ester, in the same manner as Example 1 to prepare 100 g of softener composition.