| Melting point | 179-182 °C (lit.) |
| Boiling point | 412.44°C (rough estimate) |
| density | 0.839 g/mL at 25 °C |
| bulk density | 300-500kg/m3 |
| vapor density | 9.3 (vs air) |
| refractive index | 1.5930 (estimate) |
| Fp | 11 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | ethanol: soluble1mg/mL |
| form | Solid |
| pka | 4.95(at 25℃) |
| Colour Index | 13020 |
| color | Reddish-violet |
| PH Range | 4.4(red)-6.3(yellow) |
| Odor | Odorless |
| Water Solubility | Practically insoluble in water. Soluble in alcohol, acetic acidSoluble in ethanol. Insoluble in water. |
| λmax | 410nm, 530nm, 427nm, 519nm |
| ε(extinction coefficient) | ≥10000 at 282-288nm in methanol
≥20000 at 509-519nm in methanol
≥7000 at 329-335nm in methanol |
| Merck | 14,6119 |
| BRN | 750102 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| Major Application | Waveguides, LED sensors, photoresists, liquid crystals, sol-gel matrix, optical sensors, paints, toys, detection of thiols, food freshness sensors, dental product, saliva sampling method, detecting lactic acid, carbohydrates |
| InChIKey | CEQFOVLGLXCDCX-MSUUIHNZSA-N |
| CAS DataBase Reference | 493-52-7 |
| NIST Chemistry Reference | Benzoic acid, 2-[[4-(dimethylamino)phenyl]azo]-(493-52-7) |
| IARC | 3 (Vol. 8, Sup 7) 1987 |
| EPA Substance Registry System | Methyl red (493-52-7) |