Ponceau S , Biologicalstain , 6226-79-5

Synonym(s):
3-Hydroxy-4-(2-sulfo-4-[4-sulfophenylazo]phenylazo)-2,7-naphthalenedisulfonic acid sodium salt

CAS NO.：6226-79-5

Empirical Formula: C22H17N4NaO13S4

Molecular Weight: 696.62

MDL number: MFCD00003892

EINECS: 228-319-2

PRODUCT Properties

• Density: 1.01 g/mL at 20 °C
• refractive index: n20/D 1.338
• storage temp.: Store at RT.
• solubility: H2O: soluble1mg/mL
• form: Powder/Solid
• Colour Index: 27195
• color: Red-brown
• PH: 9.0 (10g/l, H2O, 20℃)
• Water Solubility: 10 g/L
• Stability: Stable. Incompatible with strong oxidizing agents.
• CAS DataBase Reference: 6226-79-5(CAS DataBase Reference)
• EPA Substance Registry System: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[[2-sulfo-4-[(4-sulfophenyl)azo]phenyl]azo]-, tetrasodium salt (6226-79-5)

Description and Uses

Ponceau S dye 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. It is also suitable for electrophoresis, azo dye for reversible protein staining. This stain can also be used as a fiducial marker in mass spectrometric imaging.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H315-H319-H335
• Precautionary statements: P261-P280a-P304+P340-P305+P351+P338-P405-P501a
• Hazard Codes: Xi
• Risk Statements: 36/37/38
• Safety Statements: 26-36-37/39
• WGK Germany: 3
• RTECS: QJ6600000
• TSCA: Yes
• HS Code: 32041200