Description

Ponceau S: Ponceau S is the sodium salt of a diazo dye. It is used to make a stain for rapid reversible staining of protein bands on nitrocellulose or PVDF membranes (Western blots) and also for staining protein on cellulose acetate membranes. The stain is reversed with water washes and aids in subsequent immunological detection.

Specification

Grade	Indicator
Formula	C₂₂H₁₂N₄Na₄O₁₃S₄
MW	760.61
CAS	6226-79-5
Appearance	Red-brown to dark-brown Powder
Identification	To pass test
Lambda max.	~520 (352) nm in water
Dye content	>80%
Loss on drying	<10%
Solubility	Readily soluble in water to give a clear red solution
Storage	R.T

Documents

COA

SDS

Disclaimer: For laboratory research use only.