Ponceau-S, Sodium Salt (CAS 6226-79-5)

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Synonym:	Acid Red
Application:	A Ponceau azo dye for reversible protein staining
CAS Number:	6226-79-5
Purity:	≥90%
Molecular Weight:	760.57
Molecular Formula:	C₂₂H₁₂N₄Na₄O₁₃S₄

Description

Ponceau-S, Sodium Salt is a member of the Ponceau Azo Dye family that is commonly used as a protein dye for the rapid and reversible staining of protein bands on nitrocellulose, PVDF and cellulose acetate membranes in applications such as immunoblotting and Western Blots. This high purity grade, anionic acid dye is easily reversed with water washes.

Technical Information

Physical State:	Solid
Solubility:	Soluble in water (10 g/l) at 20 °C. Insoluble in ether.
Storage:	Store at 4° C
Melting Point:	300 °C
Density:	1.01 g/cm³ at 20 °C
Refractive Index:	n²⁰_D 1.34
Color Index Number:	27195

Safety and Reference Information

WGK Germany:	3
RTECS:	QJ6600000
PubChem CID:	6508672
MDL Number:	MFCD00003892
EC Number:	228-319-2
SMILES:	C1=CC(=CC=C1N=NC2=CC(=C(C=C2)N/N=C/3\C4=C(C=C(C=C4)S(=O)(=O)[O-])C=C(C3=O)S( =O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

References

1. Pesce, M.A., et al. 1973. Clin. Chem. 19: 1265-1267. PMID: 4128002
2. Aebersold, R.H., et al. 1987. Proc. Natl. Acad. Sci. U.S.A. 84: 6970-6974. PMID: 3313383
3. Shepard, M.D., et al. 1987. Clin Chem. 33: 792-795. PMID: 3594816
4. Klein, D., et al. 1995. Biochem. Mol. Biol. Int. 36: 59-66. PMID: 7545052

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