Detergent compositions, preferably tablets, comprise an improved solubility aid wherein the solubility aid contains an organic molecule, which has a first polar group and a second polar group separated from each other by less than 5 aliphatic carbon atoms. The use of the solubility aid provides detergent tablets which are both strong and durable to resist breakage during storage and transportation, but which also disintegrate rapidly upon contact with an aqueous wash solution so that the components of the tablet can provide detersive benefits during the wash process.