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Orangé de méthyle dans de l'eau, qualité ACS du réactif 85% (teneur en colorant), Sigma-Aldrich®

Marques : SIGMA ALDRICH MICROSCOPY
Ratings: Ecrire un avis

Total Evaluation: 0
Moyenne des Notes : 0.0 sur 5

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Synonyme(s): 4-(4-Diméthylaminophénylazo)benzènesulfonate de sodium

M-Clarity™ (Niveau de Qualité) = MQ200

114510-25G 114510-100G 114510-500G
114510-25GEA 36.4 EUR
114510-25G 114510-100G 114510-500G
Orangé de méthyle dans de l'eau, qualité ACS du réactif 85% (teneur en colorant), Sigma-Aldrich®
Orangé de méthyle

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.


  • 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

Formule: C₁₄H₁₄N₃NaO₃S
Poids moléculaire: 327.34 g/mol
Point d'ébullition: ∼90 °C (1013 hPa)
Point de fusion: >300 °C
Densité: ∼1 g/cm³ (20 °C)
Point éclair: 38
Température de stockage: Température ambiante
Numéro MDL: MFCD00007502
Numéro CAS: 547-58-0
EINECS: 208-925-3
UN: 3143
ADR: 6.1 III
Indice Merck: 13,06127
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Résultats des tests de spécification

Appearance (colour) Orange
Appearance (form) Powder
Infrared spectrum Conforms to structure
Visual interval, pH 3.0 pink or red Pass
Visual interval, pH 3.2 pinkish orange Pass
Visual interval, pH 4.4 yellow Pass
Appearance (clarity) Pass
Carbon 43.7 - 59.1%
Nitrogen 10.9 - 14.8%


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