An azo dye
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Acid Orange 7

Item No. 44523

Product Insert (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-benzenesulfonic acid, monosodium salt
CAS Number
633-96-5
Synonyms
  • AO7
  • Orange 4
  • Orange II
  • 2-Napthol Orange
Molecular Formula
C16H11N2O4S • Na
Formula Weight
350.3
Emission
580 nma
Formulation (Request formulation change)
A solid
Solubility(Learn about Variance in Solubility)
DMSO: Soluble: ≥10 mg/mlPBS (pH 7.2): Sparingly soluble: 1-10 mg/ml
SMILES
O=S([O-])(C1=CC=C(C=C1)N=NC2=C(C=CC3=C2C=CC=C3)O)=O.[Na+]
InChi Code
InChI=1S/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,19H,(H,20,21,22);/q;+1/p-1
InChi Key
CQPFMGBJSMSXLP-UHFFFAOYSA-M
Shipping & Storage Information
Storage
-20°C
Shipping
Wet ice in continental US; may vary elsewhere
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    25 g

    $35

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    100 g

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    Product Description

    Acid orange 7 is an azo dye.1 It displays absorbance/emission maxima of 480/580 nm, respectively. Formulations containing acid orange 7 have been used as dyes in fabric, food, and cosmetics.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Vinodgopal, K., and Kamat, P.V. Photochemistry of textile azo dyes. Spectral characterization of excited state, reduced and oxidized forms of Acid Orange 7. J. Photochem. Photobiol. A Chem. 83(2), (1994).