Determine the necessary mass, volume, or concentration for preparing a solution.
Suitable for molecular biology Suitable for molecular biology for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 11 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
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. The following are two common stain formulations: 0.1% Ponceau S (w/v) in 5% acetic acid 2% Ponceau S (w/v) in 30% TCA, 30% sulfosalicylic acid
| Pubchem Sid | 488192212 |
|---|---|
| Pubchem Sid Url | https://pubchem.ncbi.nlm.nih.gov/substance/488192212 |
| Sorrisos canónicos | 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+] |
| IUPAC Name | tetrasodium;3-hydroxy-4-[[2-sulfonato-4-[(4-sulfonatophenyl)diazenyl]phenyl]diazenyl]naphthalene-2,7-disulfonate |
| InChIKey | KQHKSGRIBYJYFX-UHFFFAOYSA-J |
| INCHI | 1S/C22H16N4O13S4.4Na/c27-22-20(43(37,38)39)10-12-9-16(41(31,32)33)6-7-17(12)21(22)26-25-18-8-3-14(11-19(18)42(34,35)36)24-23-13-1-4-15(5-2-13)40(28,29)30;;;;/h1-11,27H,(H,28,29,30)(H,31,32,33)(H,34,35,36)(H,37,38,39);;;;/q;4*+1/p-4 |
| SMILES isoméricas | 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+] |
| WGK Alemanha | 3 |
| RTECS | QJ6600000 |
| Peso molecular | 760.57 |
| Reaxy-Rn | 6265648 |
| Reaxys-RN_link_address | https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=6265648&ln= |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Benzenoids |
| Classe | Naphthalenes |
| Subclass | Naphthalene sulfonic acids and derivatives |
| Intermediate Tree Nodes | Naphthalene sulfonates |
| Direct Parent | 2-naphthalene sulfonates |
| Alternative Parents | Azobenzenes 2-naphthalene sulfonic acids and derivatives Benzenesulfonic acids and derivatives Benzenesulfonyl compounds 1-sulfo,2-unsubstituted aromatic compounds Phenoxides Sulfonyls Organosulfonic acids Azo compounds Propargyl-type 1,3-dipolar organic compounds Organopnictogen compounds Organooxygen compounds Organic sodium salts Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aromatic homopolycyclic compounds |
| Substituents | Azobenzene - 2-naphthalene sulfonic acid or derivatives - 2-naphthalene sulfonate - Benzenesulfonate - Arylsulfonic acid or derivatives - 1-sulfo,2-unsubstituted aromatic compound - Benzenesulfonyl group - Phenoxide - Monocyclic benzene moiety - Organic sulfonic acid or derivatives - Organosulfonic acid or derivatives - Organosulfonic acid - Sulfonyl - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organic alkali metal salt - Organic sodium salt - Organic oxygen compound - Organopnictogen compound - Organic oxide - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Hydrocarbon derivative - Organic salt - Organic nitrogen compound - Aromatic homopolycyclic compound |
| Descrição | This compound belongs to the class of organic compounds known as 2-naphthalene sulfonates. These are organic aromatic compounds that contain a naphthalene moiety that carries a sulfonic acid group at the 2-position. Naphthalene is a bicyclic compound that is made up of two fused benzene ring. |
| External Descriptors | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Data | Item |
|---|---|---|---|
| Certificate of Analysis | Sep 21, 2026 | P109022 | |
| Certificate of Analysis | Jul 25, 2026 | P109022 | |
| Certificate of Analysis | Jul 25, 2026 | P109022 | |
| Certificate of Analysis | Jul 25, 2026 | P109022 | |
| Certificate of Analysis | Mar 24, 2025 | P109022 | |
| Certificate of Analysis | Mar 24, 2025 | P109022 | |
| Certificate of Analysis | Mar 24, 2025 | P109022 | |
| Certificate of Analysis | Mar 24, 2025 | P109022 | |
| Certificate of Analysis | Feb 17, 2025 | P109022 | |
| Certificate of Analysis | Nov 26, 2024 | P109022 | |
| Certificate of Analysis | Oct 19, 2024 | P109022 | |
| Certificate of Analysis | Nov 17, 2022 | P109022 | |
| Certificate of Analysis | Nov 17, 2022 | P109022 | |
| Certificate of Analysis | Nov 17, 2022 | P109022 | |
| Certificate of Analysis | Nov 17, 2022 | P109022 | |
| Certificate of Analysis | Nov 17, 2022 | P109022 | |
| Certificate of Analysis | Aug 30, 2022 | P109022 |
| Solubilidade | Soluble in water (1 mg/ml). Insoluble in ether. |
|---|---|
| Peso molecular | 760.600 g/mol |
| XLogP3 | |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 17 |
| Rotatable Bond Count | 4 |
| Exact Mass | 759.887 Da |
| Monoisotopic Mass | 759.887 Da |
| Topological Polar Surface Area | 332.000 Ų |
| Heavy Atom Count | 47 |
| Formal Charge | 0 |
| Complexity | 1430.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 5 |
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