An aqueous liquid composition characterized by containing an alkali salt, an alkali metal salt, an alkali earth metal salt or an ammonium salt of a compound represented by the following formula (1). ##STR1##

in the form of free acid in an amount of 10-40 mass % and inorganic salt in an amount of 1.1-10 mass % can easily be produced without a desalting process or the like which has been included in a conventional process and it has an excellent storage stability and excellent fluorescent brightening effect.