| Alternate Names | Acid Orange 52 |
| Application | Methyl orange is a pH indicator dye for titrations |
| CAS Number | 547-58-0 |
| Molecular Weight | 327.33 |
| Molecular Formula | C14H14N3NaO3S |
| Supplemental Information | This is classified as a Dangerous Good for transport and may be subject to additional shipping charges. |
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data (including water content).
Methyl orange is a pH indicator frequently used in titrations. Methyl orange is also used for histological microscopy
TECHNICAL INFORMATION
| Appearance | Powder or crystalline or crystalline powder |
| Physical State | Solid |
| Solubility | Soluble in water (5 mg/ml at 20° C), ethanol (0.3 mg/ml), and pyrimidine (slightly). Insoluble in ether, and alcohol. |
| pH | 6.5 (5 g/l at 20°C) |
| Storage | Store at room temperature |
| Melting Point | >300° C |
| Refractive Index | n20D ~1.61 (Predicted) |
SAFETY INFORMATION
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
| WGK Germany | 3 |
| RTECS | DB6327000 |
| PubChem CID | 23673835 |
| Merck Index | 14:6105 |
| MDL Number | MFCD00007502 |
| EC Number | 208-925-3 |
| Beilstein Registry | 4732884 |
| SMILES | CN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+] |