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CAS 6226-79-5

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Ponceau S

Description:
Ponceau S, with the CAS number 6226-79-5, is a synthetic azo dye commonly used in various applications, including food coloring, biological staining, and as a pH indicator. It is characterized by its bright red hue, which is attributed to the presence of azo groups (-N=N-). Ponceau S is water-soluble, allowing it to easily dissolve in aqueous solutions, making it suitable for use in various laboratory and industrial settings. The dye is often employed in histology and microscopy for staining proteins and other biological materials, as it provides good contrast and visibility. In food applications, it is used to enhance the visual appeal of products, although its use is regulated in many countries due to potential health concerns. Ponceau S is also known for its stability under acidic conditions but may degrade under alkaline conditions or prolonged exposure to light. Overall, it is a versatile compound with significant utility in both scientific and commercial fields.
Formula:C22H16N4O13S4·4Na
InChI: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);;;;
InChI key:InChIKey=NTBFSRIJWHXCHG-UHFFFAOYSA-N
SMILES:N(=NC1=C(S(=O)(=O)O)C=C(N=NC2=CC=C(S(=O)(=O)O)C=C2)C=C1)C=3C4=C(C=C(S(=O)(=O)O)C3O)C=C(S(=O)(=O)O)C=C4.[Na]
Synonyms:
  • 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[2-[2-sulfo-4-[2-(4-sulfophenyl)diazenyl]phenyl]diazenyl]-, sodium salt (1:4)
  • 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[[2-sulfo-4-[(4-sulfophenyl)azo]phenyl]azo]-, tetrasodium salt
  • 3-Hydroxy-4-[2-sulfo-4-(4-sulfophenylazo)phenylazo]-2,7-naphthalenedisulfonic acid, tetrasodium salt
  • Acid red 112
  • Ponceau Red S
  • Ponceau S Extra
  • Ponceau S solution
  • Tetrasodium 3-Hydroxy-4-(2-Sulphonato-4-(4-Sulphonatophenylazo)Phenylazo)Naphthalene-2,7-Disulphonat
  • tetrasodium 3-hydroxy-4-[(E)-{2-sulfonato-4-[(E)-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl]naphthalene-2,7-disulfonate
  • C.I. Acid Red 112
  • See more synonyms
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