A flowable detergent preparation containing, based on the total weight thereof, a) 0.1 to 5 wt.% of at least one catechol compound of formula wherein R1 and R2 represent, independently of one another, a hydrocarbon functional group having 1 to 20 carbon atoms that is optionally substituted by at least one functional group selected from hydroxy, (C1-C4)-alkoxy, (C1-C4)-alkoxy(CH2CH2O)n-, -NR'R" or -N+R'R"R′′′ X-, where n = 1 to 10, R', R" and R′′′ represent, independently of one another, H or a linear or branched aliphatic hydrocarbon functional group having 1 to 3, preferably 1 to 2, carbon atoms and X- represents an anion; b) 0.1 to 0.9 wt.% of at least one phosphonate; c) 0.5 to 10 wt.% of a polyalkoxylated amine having a weight-average molecular weight Mw in the range from 600 g/mol to 10000 g/mol, which is obtainable by reacting hydroxyalkylamines having a molecular weight of less than 200 g/mol with alkylene oxides, wherein the polyalkoxylated amine satisfies the general formula in which R represents a -(CH2CHR'O)n"-(CH2CHR"O)m"-H group, R' and R" represent, independently of one another, H, CH3 or CH2CH3, n, n' and n" represent, independently of one another, numbers from 0 to 30, preferably from 0 to 10 and in particular 0 to 5, and m, m' and m" represent, independently of one another, numbers from 0 to 30, preferably from 5 to 20 and in particular from 12 to 16, with the proviso that the sum n + n' + n" + m + m' + m" is at least 14, preferably in the range from 18 to 100 and in particular in the range from 20 to 70; d) less than 20 wt.% of water. a) 0.1 to 5 wt.% of at least one catechol compound of formula wherein R1 and R2 represent, independently of one another, a hydrocarbon functional group having 1 to 20 carbon atoms that is optionally substituted by at least one functional group selected from hydroxy, (C1-C4)-alkoxy, (C1-C4)-alkoxy(CH2CH2O)n-, -NR'R" or -N+R'R"R′′′ X-, where n = 1 to 10, R', R" and R′′′ represent, independently of one another, H or a linear or branched aliphatic hydrocarbon functional group having 1 to 3, preferably 1 to 2, carbon atoms and X- represents an anion; b) 0.1 to 0.9 wt.% of at least one phosphonate; c) 0.5 to 10 wt.% of a polyalkoxylated amine having a weight-average molecular weight Mw in the range from 600 g/mol to 10000 g/mol, which is obtainable by reacting hydroxyalkylamines having a molecular weight of less than 200 g/mol with alkylene oxides, wherein the polyalkoxylated amine satisfies the general formula in which R represents a -(CH2CHR'O)n"-(CH2CHR"O)m"-H group, R' and R" represent, independently of one another, H, CH3 or CH2CH3, n, n' and n" represent, independently of one another, numbers from 0 to 30, preferably from 0 to 10 and in particular 0 to 5, and m, m' and m" represent, independently of one another, numbers from 0 to 30, preferably from 5 to 20 and in particular from 12 to 16, with the proviso that the sum n + n' + n" + m + m' + m" is at least 14, preferably in the range from 18 to 100 and in particular in the range from 20 to 70; in which R represents a -(CH2CHR'O)n"-(CH2CHR"O)m"-H group, R' and R" represent, independently of one another, H, CH3 or CH2CH3, n, n' and n" represent, independently of one another, numbers from 0 to 30, preferably from 0 to 10 and in particular 0 to 5, and m, m' and m" represent, independently of one another, numbers from 0 to 30, preferably from 5 to 20 and in particular from 12 to 16, with the proviso that the sum n + n' + n" + m + m' + m" is at least 14, preferably in the range from 18 to 100 and in particular in the range from 20 to 70; d) less than 20 wt.% of water.