Ponceau S: Difference between revisions

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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 [[protein|proteins]]. It has also been used as a [[silk|silk]] and [[wool|wool]] dye and as a former food colorant for maraschino cherries.
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 [[protein|proteins]]. It has also been used as a [[silk|silk]] and [[wool|wool]] dye and as a former food colorant for maraschino cherries.
 
[[[SliderGallery rightalign|ponceau S.jpg~Chemical structure]]]
== Synonyms and Related Terms ==
== Synonyms and Related Terms ==


CI 27195
Acid Red 112; CI 27195
 
[[[SliderGallery rightalign|ponceau S.jpg~Chemical structure]]]
 
== Other Properties ==


Soluble in water. Maximum absorption wavelength = 520 nm.
==Risks==
* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC161471000&productDescription=PONCEAU+S%2C+PURE++++++++++100GR&vendorId=VN00032119&countryCode=US&language=en SDS]
== Physical and Chemical Properties ==


{| class="wikitable"
* Soluble in water.
|-
* Maximum absorption wavelength = 520 nm.
! scope="row"| Composition
* Composition = C22H16N4O13S4.4Na
| C22H16N4O13S4.4Na
* CAS = 6226-79-5
|-
* Molecular Weight = 764.62
! scope="row"| CAS
| 6226-79-5
|-
! scope="row"| Molecular Weight
| mol. wt. = 764.62
|}


== Hazards and Safety ==
==Resources and Citations===
 
Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/p5328.htm 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.
 
== Sources Checked for Data in Record ==


*  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.
* ''The Merck Index'', Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996  Comment: entry 7750
* ''The Merck Index'', Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996  Comment: entry 7750
* Aldrich Chemical Catalog
* Aldrich Chemical Catalog
 
* Wikipedia: [https://en.wikipedia.org/wiki/Ponceau_S Ponceau S] Accessed April 2026




[[Category:Materials database]]
[[Category:Materials database]]

Latest revision as of 09:51, 29 April 2026

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.

Chemical structure

Ponceau S.jpg

Synonyms and Related Terms

Acid Red 112; CI 27195

Risks

  • ThermoFisher: SDS

Physical and Chemical Properties

  • Soluble in water.
  • Maximum absorption wavelength = 520 nm.
  • Composition = C22H16N4O13S4.4Na
  • CAS = 6226-79-5
  • Molecular Weight = 764.62

Resources and Citations=

  • 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.
  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7750
  • Aldrich Chemical Catalog
  • Wikipedia: Ponceau S Accessed April 2026
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