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234109

Sigma-Aldrich

Methyl Orange

certified by the Biological Stain Commission

Synonym(s):

4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt, Acid Orange 52, Helianthin, Orange III

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About This Item

Empirical Formula (Hill Notation):
C14H14N3NaO3S
CAS Number:
547-58-0
Molecular Weight:
327.33
Colour Index Number:
13025
Beilstein/REAXYS Number:
4732884
EC Number:
208-925-3
MDL number:
MFCD00007502
UNSPSC Code:
12171500
PubChem Substance ID:
24854020

grade

certified by the Biological Stain Commission

composition

Dye content, ≥85%

pH

3.0-4.4, pink to yellow

λmax

507 nm

SMILES string

[Na+].CN(C)c1ccc(cc1)\N=N\c2ccc(cc2)S([O-])(=O)=O

InChI

1S/C14H15N3O3S.Na/c1-17(2)13-7-3-11(4-8-13)15-16-12-5-9-14(10-6-12)21(18,19)20;/h3-10H,1-2H3,(H,18,19,20);/q;+1/p-1/b16-15+;

InChI key

STZCRXQWRGQSJD-GEEYTBSJSA-M

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Suitability

Certified for use in the Wilson-Ezrin method for pituitary acidophils; Kreyberg′s method for keratin and mucus; as a counterstain following Heidenhain′s or Weigert′s hematoxylin on paraffin sections; as a substitute for orange G in Flemming′s triple stain.

pictograms

Skull and crossbones
GHS06

signalword

Danger

hcodes

H301

Hazard Classifications

Acute Tox. 3 Oral

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
MKBN2666V
MKBH9793V
29696CJ
14401EQ
06125CR

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Katarzyna A Michalow et al.
Environmental science and pollution research international, 19(9), 3696-3708 (2012-10-12)
TiO(2):Nb nanopowders within a dopant concentration in the range of 0.1-15 at.% were prepared by one-step flame spray synthesis. Effect of niobium doping on structural, optical and photocatalytic properties of titanium dioxide nanopowders was studied. Morphology and structure were investigated by
P Kumar et al.
Colloids and surfaces. B, Biointerfaces, 103, 658-661 (2012-12-26)
In this paper, we report on biosynthesis of silver nanoparticles using Ulva lactuca (seaweed) at room temperature along with photocatalytic degradation of methyl orange dye. UV spectral analysis showed peak at 430 nm with special reference to the excitation of
Jing Cao et al.
Journal of hazardous materials, 239-240, 316-324 (2012-09-29)
Novel p-n junction photocatalysts BiOI/(BiO)2CO3 with different contents of BiOI were in situ synthesized by etching (BiO)2CO3 precursor with hydroiodic acid (HI) solution. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectrometry (FT-IR), energy-dispersive spectroscopy (EDS)
Anjana Sarkar et al.
Nanotechnology, 23(47), 475711-475711 (2012-11-03)
The structure, composition and photocatalytic activity of TiO(2) nanoparticles annealed in various gas atmospheres (N(2), NH(3) and H(2)) were studied in this work. The effect of treatment on crystal structure, particle size, chemical composition and optical absorbance were assessed by
Tarek Alammar et al.
Nanoscale, 5(17), 8045-8055 (2013-07-23)
The phase selective synthesis of nanocrystalline TiO2, titania, in ionic liquids (ILs) is explored. The influence not only of the IL but also of the Ti-precursor, pH, and temperature is investigated. Sonochemical synthesis, microwave synthesis and conventional heating are compared.
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