Concentrated acid red 151 dye-surfactant solution of 15 to 25%

Claim 1

An improved aqueous-organic solvent solution having a pH between 10 and 13, of the disazo dye ##SPC6## wherein X is a cation selected from the group sodium, potassium, lithium, and ammonium, the improvement comprising the presence in the dye solution of a combination of i. 0.1% to 10.0%, by total weight, of an anionic surfactant, and ii. 0.1% to 3.0%, by total weight, of a nonionic surfactant, the ratio of anionic surfactant to nonionic surfactant being between 1 to 10 and 17 to 1, the dye solution having a dye concentration in the range of 15% to 25% based on the total weight of the solution, said solution being nongelling upon dilution with water, the anionic surfactant being a water-soluble salt of a substituted-benzene or -naphthalenesulfonic acid wherein the substituents are 1 to 3 alkyl groups of C 1 to C 14 , the nonionic surfactant being selected from at least one member of the group consisting of condensates of a. C 4 to C 24 alkyl primary amines and at least 5 moles of propylene oxide, b. C 4 to C 24 alkyl primary amines and at least 5 moles of ethylene oxide, c. C 12 to C 24 alcohols and at least 15 moles of ethylene oxide, d. C 12 to C 24 alcohols and a least 5 moles of propylene oxide, e. C 4 to C 24 alcohols and at least 8 moles ethylene oxide and 2 moles of propylene oxide, f. alkyl phenols and at least 8 moles of ethylene oxide, and g. ethylene oxide-propylene oxide copolymer having a molecular weight from about 1,000 to 10,000 and a proportion derived from ethylene oxide of 20 to 80 weight percent.