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Chemical structure of Ponceau S

GC16623

Ponceau S

Also known as tetrasodium;3-hydroxy-4-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]naphthalene-2,7-disulfonate

Ponceau S (Acid Red 112) is the most commonly used stain for Western blotting

ChemicalCAS6226-79-5MW760.57FormulaC22H12N4Na4O13S4
CAS number
6226-79-5
Molecular weight
760.57
Formula
C22H12N4Na4O13S4
Solubility
DMF： 0·5 mg/ml,DMSO： 10 mg/ml,Ethanol： 0·5 mg/ml,PBS (pH 7·2)： 10 mg/ml
InChIKey
KQHKSGRIBYJYFX-UHFFFAOYSA-J
Catalogue number
GC16623
Brand
GLPBIO
Computed properties PubChem CID 2723873 · TPSA 332 Ų · H-bond donors 1 · H-bond acceptors 17
TPSA
332 Ų
H-bond donors
1
H-bond acceptors
17
Rotatable bonds
4
Heavy atoms
47

SMILES C1=CC(=CC=C1N=NC2=CC(=C(C=C2)N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]

Computed descriptors from PubChem (CID 2723873), public domain. Identity cross-checked against the supplier's molecular formula and weight — verify before use.

Ordering in Israel

Lead time
Ships from the manufacturer to your lab in 8–14 business days; customs and cold chain handled by LABO Scientific.
Pricing
Quoted in ILS, excl. VAT. Add the item to your quote and we confirm the final price, usually the same business day.
Documents
Lot certificate of analysis and manufacturer SDS are emailed with your order confirmation.
Who we serve
Universities, hospitals and biotech companies across Israel. Research use only — not for diagnostic or therapeutic use.