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75370

Sigma-Aldrich

Orange II sodium salt

for microscopy (Hist.), indicator (pH 11.0-13.0)

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:
3898201
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
MA.02

grade

for microscopy (Hist.)
indicator (pH 11.0-13.0)

Quality Level

form

powder

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

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.

Application

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

Other Notes

Reagent for the extraction and spectrophotomeric determination of cationic surfactants

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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)
J. Kawase et al.
Analyst, 104, 750-750 (1979)
Waheeba Ahmed Al-Amrani et al.
Water research, 46(19), 6419-6429 (2012-10-16)
In this study, the operational factors affecting the bioregeneration of AO7-loaded MAMS particles in batch system, namely redox condition, initial acclimated biomass concentration, shaking speed and type of acclimated biomass were investigated. The results revealed that with the use of
Xin Yang et al.
Huan jing ke xue= Huanjing kexue, 32(7), 1960-1966 (2011-09-20)
Persulfate oxidation is a recently emerging advanced oxidation process for the pollution control. Persulfate (PS) degradation of azo dye acid orange 7 (AO7) in an aqueous solution was studied in the presence of suspended granular activated carbon (GAC) at ambient

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