Methyl orange in ACS Reagent grade water 85% (dye content), Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPY
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Danger
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Synonyms:
4-((4-(Dimethylamino)phenyl)diazenyl)benzenesulphonic acid, sodium salt, Methyl orange sodium salt, Helianthine
M-Clarity™ quality level = MQ200
114510-25G
114510-100G
114510-500G
114510-25GEA
21.8
GBP
114510-25G
114510-100G
114510-500G
Methyl orange in ACS Reagent grade water 85% (dye content), Sigma-Aldrich®
Methyl orange
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
Formula:
C₁₄H₁₄N₃NaO₃S MW: 327,34 g/mol Boiling Pt: ∼90 °C (1013 hPa) Melting Pt: > 300 °C Density: ∼1 g/cm³ (20 °C) Flash Pt: 38 °C Storage Temperature: Ambient |
MDL Number:
MFCD00007502 CAS Number: 547-58-0 EINECS: 208-925-3 UN: 3143 ADR: 6.1,III Merck Index: 13,06127 |
Specification Test Results
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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