An azo dye
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Acid Red 27

Item No. 44512

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
3-hydroxy-4-[2-(4-sulfo-1-naphthalenyl)diazenyl]-2,7-naphthalenedisulfonic acid, trisodium salt
CAS Number
915-67-3
Synonyms
  • Amaranth
  • AR27
  • C.I. 16185
  • C.I. Acid Red 27
  • FD&C Red No. 2
Molecular Formula
C20H11N2O10S3 • 3Na
Formula Weight
538.5
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
PBS (pH 7.2): Soluble: ≥ 10 mg/ml
λmax
218, 524 nm
SMILES
[O-]S(=O)(C1=C(O)C(N=NC(C2=C3C=CC=C2)=CC=C3S([O-])(=O)=O)=C4C(C=C(S([O-])(=O)=O)C=C4)=C1)=O.[Na+].[Na+].[Na+]
InChi Code
InChI=1S/C20H14N2O10S3.3Na/c23-20-18(35(30,31)32)10-11-9-12(33(24,25)26)5-6-13(11)19(20)22-21-16-7-8-17(34(27,28)29)15-4-2-1-3-14(15)16;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3*+1/p-3
InChi Key
WLDHEUZGFKACJH-UHFFFAOYSA-K
Shipping & Storage Information
Storage
-20°C
Shipping
Wet ice in continental US; may vary elsewhere
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    Product Description

    Acid red 27 is an azo dye.1 It displays an absorption maximum at 520 nm. Acid red 27 (47 mg/kg) increases total lymphocytes and basophils and decreases total neutrophils and monocytes but does not affect body weight or serum protein levels in rats.2 It has been found as a contaminant in wastewater.1 Formulations containing acid red 27 have previously been used as food and cosmetic dyes.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Lehl, H.K., Ong, S.-A., Ho, L.-N., et al. Decolourization and mineralization of Acid Red 27 metabolites by using multiple zoned aerobic and anaerobic constructed wetland reactor. Desalination Water Treat. 160, 81-93 (2019).

    2. Hashem, M.M., Atta, A.H., Arbid, M.S., et al. Immunological studies on Amaranth, Sunset Yellow and Curcumin as food colouring agents in albino rats. Food Chem. Toxicol. 48(6), 1581-1586 (2010).