Sialic acid solid composition as well as preparation method and application thereof

The invention relates to the technical field of sialic acid preparations, in particular to a sialic acid solid composition as well as a preparation method and application thereof. The sialic acid solid composition provided by the invention comprises sialic acid and arginine, and the pH value of an aqueous solution of the composition is 6.0-8.0. The pH value of the sialic acid solid composition provided by the invention is within the applicable range of cosmetics, and the composition has relatively strong pH buffering capacity, and can better maintain the pH value of a system under the condition that alkaline and acidic substances are added. In addition, the homogeneity of the sialic acid solid composition is improved by optimizing the preparation process, and meanwhile, the relatively high sialic acid content in the solid composition is ensured. The sialic acid solid composition is suitable for being used as a cosmetic raw material, and a solution is provided for improving the applicability of sialic acid in