Methyl Red
Also known as 2-((4-(dimethylamino)phenyl)diazenyl)benzoic acid, C.I. Acid Red 2, Acid Red 2
- CAS number
- 493-52-7
- Molecular formula
- C15H15N3O2
- Molecular weight
- 269.3 g/mol
- Catalogue number
- OS-14643
- Purity
- 99 %
- Grade
- Pharmaceutical (IP/BP/USP/EP)
- Form
- Powder
- Packing
- 1 L
₹190 per kg
Minimum order 100 kg
Documents
- Certificate of analysis (COA) On request
- Safety data sheet (MSDS) On request
Specifications
| CAS number | 493-52-7 |
|---|---|
| Molecular formula | C15H15N3O2 |
| Molecular weight | 269.3 g/mol |
| IUPAC name | 2-[[4-(dimethylamino)phenyl]diazenyl]benzoic acid |
| InChIKey | CEQFOVLGLXCDCX-UHFFFAOYSA-N |
| SMILES | CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)O |
| MDL number | MFCD00002425 |
| PubChem CID | 10303 |
| Physical form | Powder |
|---|---|
| Appearance | Red to red-violet powder, eventually with granular parts. |
| Colour | Red |
| Melting point | 179–182 °C |
| Solubility | Methanol |
| pH | 4.2–6.3 pH |
| Purity | 99 % |
|---|---|
| Grade | Pharmaceutical (IP/BP/USP/EP) |
| Packaging size | 1 L |
|---|---|
| Packaging type | Glass Bottle |
Description and applications
Methyl red is a pH indicator. It is a red to yellow dye used to measure pH levels in aqueous solutions. Methyl red changes color from red at a pH below 4.4 to yellow at a pH above 6.2, making it useful in titrations and various analytical applications. It is commonly used in microbiological tests, such as the methyl red test for bacterial fermentation in the IMViC series. Additionally, methyl red is employed in some industrial processes and as a dye in certain products. Due to its color change range, it is valuable for precise pH monitoring.
Applications
- Staining
- Lab Reagent
- pH Indicator
- Laboratory
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