Storage-stable solutions containing cyanamide

A solution containing cyanamide, comprising

• a) 15 to 60% by weight of cyanamide,
• b) 0.01 to 4% by weight of a stabilizer comprising one or more compounds from the group of phosphorus-containing acids or the salts thereof,
• c) 0.01 to 4% by weight of a nonionic surfactant containing one or more compounds selected from the group of ethoxylates according to formula (I), fatty alcohol glucosides according to formula (II) or mixtures thereof, wherein for formula (I) and (II) the following applies,
• wherein for the radicals R1, R2 and the indices n, m, the following applies, together or independently:
• R1=a linear or branched alkyl or alkenyl group having 6 to 24 carbon atoms, a partially or fully fluorinated alkyl group having 6 to 18 carbon atoms, a phenyl group, an alkyl-substituted phenyl group, a mono- or polyfunctional siloxane group,
• R2=a linear or branched alkyl or alkenyl group having 6 to 24 carbon atoms,
• n=a number from 2 to 20,
• m=a number from 1 to 5,
• d) balance water,
• wherein the components a) and c) are present in a weight ratio of cyanamide to nonionic surfactant in the range from 500:1 to 5:1.