Ponceau S
Description
A cherry red biological stain. Ponceau S is a diazo type dyes composed of the tetra sodium salt of 2,7-naphthalenedisulfonic acid. It forms a weakly acidic solution in water that can stain proteins. It has also been used as a silk and wool dye and as a former food colorant for maraschino cherries.
Synonyms and Related Terms
CI 27195
Other Properties
Soluble in water. Maximum absorption wavelength = 520 nm.
| Composition | C22H16N4O13S4.4Na |
|---|---|
| CAS | 6226-79-5 |
| Molecular Weight | mol. wt. = 764.62 |
Hazards and Safety
Mallinckrodt Baker: MSDS
Additional Information
R.Wolbers, G.Landry, "The Use of Direct Reactive Fluorescent Dyes for the Characterization of Binding Media in Cross Sectional Examinations" in Preprints of the AIC Meeting in Vancouver, 1987. M.Johnson, E.Packard, "Methods Used for Identification of Binding Media in Italian paintings of the 15th and 16th Centuries" Studies in Conservation, 16:145-164, 1971.
Authority
- Susan Budavari (ed.), The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7750
- Aldrich Chemical Catalog, Aldrich Chemical Catalog