Description_x000D_ Application_x000D_ Crystal Ponceau 6R has been used in the MSB (martius yellow–crystal scarlet–methyl blue) staining procedure for the staining of collagen fibers and erythrocytes._x000D_ Packaging_x000D_ 5 g in glass bottle_x000D_ Biochem/physiol Actions_x000D_ Crystal Ponceau 6R is mainly used in the MSB (martius yellow–crystal scarlet–methyl blue) staining procedure for the staining of connective tissue and fibrin.