Ponceau S (sodium salt) is a water-soluble azo dye used for rapid, reversible staining of proteins on nitrocellulose, PVDF, and cellulose acetate membranes. Supplied as a powder for solution preparation, it is commonly used to visualize protein bands during membrane transfer checks and prior to immunodetection workflows, and can be removed without affecting downstream analyses.
- Provides rapid, reversible staining of protein bands on membranes.
- Compatible with nitrocellulose, PVDF, and cellulose acetate membranes.
- Water-soluble dye formulated for acidic staining solutions.
- Supplied as a powder for on-demand solution preparation and storage.
- Typical dye content 75% for routine visualization.
- Removes easily to permit subsequent immunodetection steps.