Aqueous composition of alkali metal salts of partial alkyl esters of phosphoric acid, method for stabilization and a fiber finish

3-12 Stabilizing an aqueous solution of an alkali metal salt of partial alkyl esters of phosphoric acid by adding 1 to 10 weight percent of Cpolyhydric alcohol having three or more of hydroxyl groups to an alkali metal salt of partial alkyl esters of phosphoric acid having linear of branched-chain alkyl groups of 16 to 22 average carbon number, 0.6 to 1.0 degree of phosphorylation and 60 to 100% of neutralization degree, and providing a fiber finish containing the stabilized aqueous solution as a major component.