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75370

Sigma-Aldrich

Orange II sodium salt

suitable for microscopy

Synonym(s):

4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt, Acid Orange 7, Acid Orange A, Orange II, Tropaeolin 000 No. 2

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About This Item

Empirical Formula (Hill Notation):
C16H11N2NaO4S
CAS Number:
Molecular Weight:
350.32
Colour Index Number:
15510
Beilstein/REAXYS Number:
3898201
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
MA.02

form

powder

Quality Level

visual transition interval

11-13, yellow to orange-red

solubility

hot water: 0.5 g/10 mL, clear

εmax

≥500 at 478.0-488.0 nm in water

suitability

suitable for microscopy

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].Oc1ccc2ccccc2c1\N=N\c3ccc(cc3)S([O-])(=O)=O

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/b18-17+;

InChI key

CQPFMGBJSMSXLP-ZAGWXBKKSA-M

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General description

Orange II is a sulfonated azo dye.[1]

Application

It has been used in synthesis and characterization of Fe-doped aluminosilicate nanotubes with electron conductive properties.[2]

Other Notes

Reagent for the extraction and spectrophotomeric determination of cationic surfactants[3]

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves


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J. Kawase et al.
Analyst, 104, 750-750 (1979)
Properties of purified Orange II azoreductase, the enzyme initiating azo dye degradation by Pseudomonas KF46.
Zimmermann T, Kulla HG, Leisinger T.
European Journal of Biochemistry, 129(1), 197-203 (1982)
Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties.
Shafia E
Journal of Visualized Experiments, 117, 1-1 (2016)
Tadashi Ohashi et al.
Molecules (Basel, Switzerland), 17(12), 14219-14229 (2012-12-04)
Azo dyes are generally resistant to biodegradation due to their complex structures. Acid orange II is one of the most widely used dyes in the textile industry. The influence of bovine serum albumin (BSA) in different concentrations, pH, and time
Waheeba Ahmed Al-Amrani et al.
Bioresource technology, 118, 633-637 (2012-06-19)
The objectives of this study were: (1) to investigate the role of mixed culture of biomass in the regeneration of mono-amine modified silica (MAMS) and granular activated carbon (GAC) loaded with Acid Orange 7 (AO7), (2) to quantify and compare

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