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114510

Sigma-Aldrich

Methyl Orange

ACS reagent, Dye content 85 %

Synonyme(s) :

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

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About This Item

Formule empirique (notation de Hill):
C14H14N3NaO3S
Numéro CAS:
547-58-0
Poids moléculaire :
327.33
Numéro C.I. (Colour Index):
13025
Numéro Beilstein :
4732884
Numéro CE :
208-925-3
Numéro MDL:
MFCD00007502
Code UNSPSC :
12171500
ID de substance PubChem :
24847177
Nomenclature NACRES :
NA.47

Qualité

ACS reagent

Forme

powder

Composition

Dye content, 85%

Technique(s)

titration: suitable

Couleur

orange

pH

3.0-4.4, pink to yellow

visual transition interval

3.2-4.4, red to yellow

Pf

>300 °C

λmax

505 nm

Application(s)

diagnostic assay manufacturing
hematology
histology

Température de stockage

room temp

Chaîne SMILES 

[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+;

Clé InChI

STZCRXQWRGQSJD-GEEYTBSJSA-M

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Catégories apparentées

Description générale

Methyl orange (C.I. 13025) is the sodium salt of p-dimethylaminoazobenzenesulfonic acid.It is an orange-colored synthetic dye, which changes color depending on the pH of the solution. It develops a red color in acidic solution and yellow color in basic solution.

Application

Methyl orange is used as a-
  • pH indicator in the cell sap
  • counterstain to crystal violet in staining pollen tubes
  • component of a polychrome histological stain
  • solution indicator, such as in assays of oxalic and malonic acids
  • in other biomedical applications that include use in film dosimeters and as a reagent for the assay of bromide ions.

Actions biochimiques/physiologiques

Methyl Orange is an azo dye which works as a pH indicator.

Pictogrammes

Skull and crossbones
GHS06

Mention d'avertissement

Danger

Mentions de danger

H301

Conseils de prudence

P301 + P330 + P331 + P310

Classification des risques

Acute Tox. 3 Oral

Code de la classe de stockage

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

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

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Certificats d'analyse (COA)

Lot/Batch Number
SHBN0656
MKCL9427
MKCJ2859
MKCD5974
MKBP6238V

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Encapsulation of methyl orange pH-indicator into a sol-gel matrix.
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