Phloroglucin 1%, aqueous, is a staining solution used primarily in histology and botany. Phloroglucin is a phenolic derivative used as a staining reagent to selectively stain lignin, an important structural component in lignified plant tissues.

In a 1% aqueous solution, phloroglucin may penetrate tissue samples more slowly and less uniformly than in an alcoholic solution, but it is still capable of effectively staining lignin structures. The aqueous solution provides a milder staining option that can be particularly useful for sensitive samples.

Phloroglucin reacts with lignin to form a red dye complex that is readily visible under the microscope. The stain is particularly useful in the study of wood and plant structures to visualize the distribution and organization of lignin in tissue.

The 1% aqueous phloroglucin solution is specifically designed for professional use in histological and botanical laboratories and provides a gentle and effective method for staining lignin in tissue sections and plant preparations.