An azo dye
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Acid Red 4

Item No. 44621

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
4-hydroxy-3-[2-(2-methoxyphenyl)diazenyl]-1-naphthalenesulfonic acid, monosodium salt
CAS Number
5858-39-9
Synonyms
  • ​Azoeosin C.I. No. 14710
  • Amacid Eosine
  • Azo Eosin
  • Azo Eosine G
  • C.I. 14710
Molecular Formula
C17H13N2O5S • Na
Formula Weight
380.4
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
DMSO: Soluble: ≥10 mg/ml
λmax
240, 306, 376, 506 nm
SMILES
O=S([O-])(C1=CC(N=NC2=C(C=CC=C2)OC)=C(C3=C1C=CC=C3)O)=O.[Na+]
InChi Code
InChI=1S/C17H14N2O5S.Na/c1-24-15-9-5-4-8-13(15)18-19-14-10-16(25(21,22)23)11-6-2-3-7-12(11)17(14)20;/h2-10,20H,1H3,(H,21,22,23);/q;+1/p-1
InChi Key
ZXGIHDNEIWPDFW-UHFFFAOYSA-M
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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Certificates of Analysis & Batch Specific Data

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    1 g

    $52

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    5 g

    $143

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    10 g

    $260

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    25 g

    $585

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    Product Description

    Acid red 4 is an azo dye.1 It displays an absorbance maximum at 508 nm. Formulations containing acid red 4 have been used as textile dyes.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Coughlin, M.F., Kinkle, B.K., and Bishop, P.L. Degradation of azo dyes containing aminonaphthol by Sphingomonas sp strain 1CX. J. Ind. Microbiol. Biotechnol. 23(4-5), 341-346 (1999).