胶原蛋白标记

Direct Red 80 (Sirius Red) 是一种聚偶氮染料，在降解时不会释放联苯胺，比许多传统的直接染料更安全，主要用于胶原蛋白和淀粉样蛋白的染色方法。

Biebrich scarlet is a scarlet dye, it has been used in Masson’s trichrome stain for the staining of collagen. It has also been used for the staining of eosinophil.